StarTech.com DVI2VGAE DVI-D To VGA Active Adapter Converter Cable ...
40.8 GBP
Access the complete information sheet, compare prices and discover the features of PRODUCTNAME, available at the price of PRICE CURRENCY; it fits into the CATEGORY NAME category; the sale is managed by SELLER NAME and the production is by MANUFACTURER NAME.
StarTech-com-DVI-to-VGA-Cables-StarTech-com-DVI2VGAE-P-This-DVI2VGAE-active-DVI-D-to-VGA-adaptor-from-StarTech-com-lets-you-connect-a-digital-DVI-output-from-your-desktop-or-laptop-computer-onto-a-VGA-monitor-or-projector-saving-the-cost-of-upgrading-to-a-DVI-D-compatible-display-P-P-Providing-a-simple-way-to-output-user-generated-content-such-as-presentations-and-work-documents-the-DVI-D-to-VGA-converter-can-also-work-to-increase-your-productivity-by-extending-your-computer-s-desktop-o
EAN: 0065030850834
Shipping Costs: 0 GBP
Availability: in stock
Delivery Times: 2-4 Days
Condition: new
Comparison of similar products
StarTech.com HD2VGAA2 HDMI To VGA Video Adapter Converter With Audio
33.99 GBP
StarTech.com HDMI to VGA Adaptor Cables - StarTech.com HD2VGAA2, This HDMI to VGA adaptor cable from Star Tech.com will allow you to connect an HDMI output device, such as a laptop video output or digital media extender, to a VGA display device (monitor, projector) by converting the HDMI video signal from the output device into a VGA output and separate 2-channel analogue audio.The HDMI to VGA adaptor is intended for displaying user generated content such as presentations, documents, and work sheets onto a VGA projector or monitor. The adaptor can also extend your computer's desktop to double your workspace and increase productivity.The versatile converter supports resolutions including high definition 1080p, up to 1920 x 1200, which eliminates the expense of upgrading a VGA display for the sake of compatibility, and doesn't require a separate power adaptor which saves installation time and hassle.It is backed by a 2-year warranty and free lifetime technical support. StarTech.com HD2VGAA2 HDMI To VGA Video Adapter Converter With Audio
StarTech.com USB32DVIPRO USB 3.0 To DVI Graphics Adapter
100.8 GBP
StarTech-com-USB-3-0-to-DVI-Graphics-Adaptors-StarTech-com-USB32DVIPRO-P-This-USB-3-0-to-DVI-Adaptor-from-StarTech-com-turns-an-available-USB-3-0-port-into-a-DVI-output-with-high-resolution-2048-x-1152-video-support-providing-a-convenient-external-video-solution-that-makes-it-easy-to-add-multi-monitor-capability-to-a-USB-3-0-enabled-desktop-or-laptop-computer-optimal-performance-from-USB-3-0-backward-compatible-with-USB-2-0-P-P-Leveraging-the-high-bandwidth-5-Gbps-SuperSpeed-USB-3-0
StarTech.com HD2VGAE2 HDMI To VGA Adapter Cable
43.2 GBP
StarTech.com HDMI to VGA Adaptor Cables - StarTech.com HD2VGAE2, This HDMI to VGA adaptor from StarTech.com allows you to connect an HDMI output from your laptop, ultrabook, or desktop computer onto a VGA monitor or projector, saving the cost of upgrading to an HDMI compatible display.Intended for outputting user generated content such as presentations, and work documents, this converter can also work to increase your productivity by extending your computer's desktop onto a secondary monitor, doubling available workspace.With no need for an external power source, and support for resolutions up to 1080p (1920 x 1080), this active HDMI to VGA adaptor offers a compact and portable solution for connecting a High-Definition VGA display.The HD2VGAE2 adaptor is backed by a 2-year warranty and free lifetime technical support. StarTech.com HD2VGAE2 HDMI To VGA Adapter Cable
StarTech.com USB32VGAES USB 3.0 To VGA Adapter - Slim
36 GBP
StarTech.com USB 3.0 to VGA Adaptors - StarTech.com USB32VGAES, The USB32VGAES Slim USB 3.0 to VGA Adaptor from StarTech.com turns a USB 3.0 port into a VGA output port with 1920 x 1200/1080p video support. Functioning as an external graphics card, this USB to VGA adaptor provides a convenient way to add multi-monitor capability to a USB 3.0-enabled desktop or laptop computer To save space while travelling, this ultra-portable adaptor features a lightweight, small footprint design that fits easily in a laptop carrying bag.Using the high-bandwidth (5 Gbps) SuperSpeed USB 3.0 interface, the adaptor delivers smooth, high-definition content to your VGA display/projector. The adaptor can be used to mirror your primary desktop, showing the same image on each display, or to extend your desktop to double your workspace and increase your productivity.The USB32VGAES is backed by a 2-year warranty and free lifetime technical support. StarTech.com USB32VGAES USB 3.0 To VGA Adapter - Slim
LINDY 32120 Converter DVI HDMI VGA 3840x2160 Pixel Audio
69.31 GBP
LINDY --Conrad DVI socket 25-pin 658821 - LINDY 32120, LINDY 32120 is the Manufacturer's Part Number for a high-performance converter designed to facilitate seamless connectivity between diverse video interfaces. This product, also identified by the alternate description 2534633, supports DVI, HDMI, and VGA inputs and is capable of delivering a maximum resolution of 3840x2160 pixels. It ensures high-quality audio transfer alongside video, making it an efficient solution for engineering applications requiring compatibility between modern digital and legacy analogue devices. Typical applications include integration in professional audio-visual setups, conference systems, and educational institutions where multiple display standards are in use. Its robust build and versatility make it suitable for environments that demand reliable signal conversion and interfacing. LINDY 32120 Converter DVI HDMI VGA 3840x2160 Pixel Audio
StarTech.com StarTech DVIDDMM2M 2m DVI-D Dual Link Cable - M/M
18.39 GBP
StarTech.com DVI-D Dual Link Cable - M/M - StarTech.com DVIDDMM2M, The StarTech.com DVIDDMM2M 2m DVI-D Dual Link cable features 2 x male DVI (25-pin) connectors and provides a reliable, purely digital connection between your desktop or laptop computer and a DVI-D monitor or projector. It supports resolutions of up to 2560 x 1600, transmission rates of up to 9.9 Gbits/sec, and is fully compliant with DVI DDWG standards.Backed by StarTech.com's Lifetime Warranty. StarTech DVIDDMM2M 2m DVI-D Dual Link Cable - M/M
StarTech.com StarTech DVIDDMM3M 3m DVI-D Dual Link Cable - M/M
20.79 GBP
StarTech.com DVI-D Dual Link Cable - M/M - StarTech.com DVIDDMM3M, The StarTech.com DVIDDMM3M 3m DVI-D Dual Link cable features 2 x male DVI (25-pin) connectors and provides a reliable, purely digital connection between your desktop or laptop computer and a DVI-D monitor or projector. It supports resolutions of up to 2560 x 1600, transmission rates of up to 9.9 Gbits/sec, and is fully compliant with DVI DDWG standards.Backed by StarTech.com's Lifetime Warranty. StarTech DVIDDMM3M 3m DVI-D Dual Link Cable - M/M
StarTech.com StarTech HDDVIMM3M 3m HDMI To DVI-D Cable - M/M
15.87 GBP
StarTech.com HDMI To DVI-D Cable Range - StarTech.com HDDVIMM3M, The StarTech.com HDDVIMM3M 3m HDMI to DVI-D cable enables you to connect a DVI-D video card or other DVI-D output device to a HDMI display. The cable supports bi-directional operation that also allows the reverse configuration, delivering digital video from an HDMI output to a DVI-D display. A valuable addition to any digital signage, multimedia or home theatre application, this high performance cable is designed to provide the best quality picture available from either an HDMI or DVI source.Backed by the StarTech.com lifetime warranty. StarTech HDDVIMM3M 3m HDMI To DVI-D Cable - M/M
StarTech.com StarTech HDDVIMF8IN 200mm HDMI To DVI-D Video Cable Adaptor - M/F
15.03 GBP
StarTech.com HDMI To DVI-D Cable Range - StarTech.com HDDVIMF8IN, The StarTech.com HDDVIMF8IN 200mm HDMI to DVI video adaptor cable features one HDMI male connector and one DVI-D female connector, which enables a bi-directional connection between HDMI devices and DVI-D devices to overcome compatibility issues. The flexible cable design reduces strain on your device port and helps keep adjacent ports accessible, unlike solid adaptors.Backed by the StarTech.com lifetime warranty. StarTech HDDVIMF8IN 200mm HDMI To DVI-D Video Cable Adaptor - M/F
StarTech.com StarTech HDDVIFM8IN 200mm HDMI To DVI-D Video Cable Adaptor - F/M
14.73 GBP
StarTech.com HDMI To DVI-D Cable Range - StarTech.com HDDVIFM8IN, The StarTech.com HDDVIFM8IN 200mm HDMI to DVI-D video adaptor cable features one HDMI female connector and one DVI-D male connector. This enables a bi-directional connection between HDMI devices and DVI-D devices to overcome compatibility issues. Backed by the StarTech.com lifetime warranty. StarTech HDDVIFM8IN 200mm HDMI To DVI-D Video Cable Adaptor - F/M
StarTech.com SAT32MSAT257 mSATA SSD To 2.5in SATA Adapter Converter
32.79 GBP
StarTech.com SATA/SSD Adapter Converters and Enclosures - StarTech.com SAT32MSAT257, You can vastly increase system performance by adding the speed of an mSATA SSD in any 2.5in SATA application, with this mSATA to SATA adaptor from StarTech.com.This adaptor utilises the full potential of your SATA III controller, reduces data transfer bottle necks with file transfer speeds up to 6 Gbps and saves you money by reducing your power consumption over regular platter drives.The SAT32MSAT257 is backed by a 2-year warranty, and lifetime technical support. StarTech.com SAT32MSAT257 mSATA SSD To 2.5in SATA Adapter Converter
StarTech.com DP2HDMI DisplayPort To HDMI Video Adapter Converter
24.39 GBP
StarTech.com Display Port to HDMI Adaptors - StarTech.com DP2HDMI, This DisplayPort® to HDMI adaptor from StarTech.com lets you connect an HDMI-enabled video display to a DisplayPort video source (e.g.DisplayPort video cards, etc.), eliminating the expense of having to upgrade your display for DisplayPort compatibility.This adaptor supports display resolutions of up to 1920 x 1200 allowing you to take full advantage of HDMI video capability. It is a passive adaptor cable that requires a DP++ port (DisplayPort++), meaning that DVI and HDMI signals can also be passed through the port. This adaptor allows for audio pass-through if supported by the video source. It is backed by a 2-year warranty and free lifetime technical support. StarTech.com DP2HDMI DisplayPort To HDMI Video Adapter Converter
StarTech.com MDP2HDMI Mini DisplayPort To HDMI Video Adapter Converter
21.99 GBP
StarTech.com Mini DisplayPort Adaptors and Converters - StarTech.com MDP2HDMI, The MDP2HDMI Mini DisplayPort® HDMI Adaptor Cable from StarTech.com offers a cost-effective HDMI/Mini DisplayPort link, enabling you to connect an HDMI display to a device with a Mini DisplayPort output while saving the expense of upgrading the monitor for compatibility.The MDP2HDMI is a passive adaptor cable that requires a DP++ port (DisplayPort++), meaning that DVI and HDMI signals can also be passed through the port. It is compatible with Intel® Thunderbolt™, when connected directly to a supporting DisplayPort over Thunderbolt™ I/O port.This adaptor is backed by a 2-year warranty and free lifetime technical support. StarTech.com MDP2HDMI Mini DisplayPort To HDMI Video Adapter Converter
StarTech.com DP2HDMI2 DisplayPort To HDMI Video Adapter Converter
20.79 GBP
StarTech.com Display Port to HDMI Adaptors - StarTech.com DP2HDMI2, The DP2HDMI2 DisplayPort® to HDMI Adaptor from StarTech.com allows you to connect an HDMI-enabled display or projector to a DisplayPort out port from a computer (desktop or laptop), eliminating the expense of having to upgrade your display for DisplayPort compatibility.The adaptor supports display resolutions of up to 1920 x 1200, allowing you to take full advantage of HDMI video capability.The DP2HDMI2 is a passive adaptor cable that requires a DP++ port (DisplayPort++), meaning that DVI and HDMI signals can also be passed through the port. This adaptor allows for audio pass-through if supported by the video source. Backed by a 2-year warranty and free lifetime technical support. StarTech.com DP2HDMI2 DisplayPort To HDMI Video Adapter Converter
StarTech.com IDE2SAT2 40 Pin Male IDE To SATA Adapter Converter Wi...
29.19 GBP
StarTech-com-IDE2SAT2-40-Pin-Male-IDE-To-SATA-Adapter-Converter-with-ODD-StarTech-com-IDE2SAT2-P-The-IDE2SAT2-40-pin-IDE-to-SATA-adaptor-from-StarTech-com-enables-you-to-connect-a-SATA-I-II-III-drive-to-an-available-IDE-ATA-33-66-100-133-motherboard-port-a-cost-effective-solution-that-allows-you-to-add-newer-SATA-drives-and-keep-your-existing-motherboard-P-P-This-adaptor-offers-a-cost-effective-solution-for-bridging-the-gap-between-a-newer-2-5in-3-5in-5-25in-SATA-drive-and-older-IDE-mo
StarTech.com SV231DDVDUA 2 Port USB DVI VGA Dual Display KVM Switc...
199.2 GBP
StarTech.com 2- and 4-port USB DVI KVM Switches with USB Hubs and Audio Support - StarTech.com SV231DDVDUA, The SV231DDVDUA 2-port Dual Monitor KVM switch offers a complete multimedia switching solution, letting users control 2x dual display computers using a single USB mouse and keyboard peripheral set. With support for high-resolution video interfaces, this dual view KVM switch provides 1x VGA (analogue) and 1x DVI-I port per computer, as well as audio switching between connected computers. The switch features an integrated 2-port USB hub that allows USB 2.0 peripherals to be shared between computers, eliminating the need to purchase duplicate peripherals.Suitable for any workspace, the dual monitor KVM switch has a compact desktop design and features a rugged metal chassis that helps ensure durable performance. Its high-resolution DVI and VGA ports support almost any dual display scenario; even with one DVI + VGA PC, and one dual DVI PC, an adaptor can be used with this KVM to support your configuration. Absolutely no software or drivers required, providing a completely OS independent KVM solution. Backed by a StarTech.com 3-year warranty and free lifetime technical support. StarTech.com SV231DDVDUA 2 Port USB DVI VGA Dual Display KVM Switch with Audio
StarTech.com SAT2IDEADP SATA To 3.5/2.5 IDE HDD Adapter For Hard D...
30.39 GBP
StarTech-com-SAT2IDEADP-SATA-To-3-5-2-5-IDE-HDD-Adaptor-for-Hard-Drive-Docks-StarTech-com-SAT2IDEADP-P-The-SAT2IDEADP-SATA-to-IDE-hard-drive-adaptor-from-StarTech-com-enables-you-to-use-your-2-5-inch-3-5-inch-IDE-based-PATA-hard-drives-in-most-SATA-based-HDD-docking-stations-and-drive-duplicators-It-features-all-metal-construction-for-maximum-durability-and-is-fully-compatible-with-IDE-hard-drives-up-to-ATA-133-133MBps-P-P-The-unique-mounting-style-of-the-SATA-IDE-adaptor-enables-it
StarTech.com ICUSBAUDIO2D USB Stereo Audio Adapter External Sound Card
37.2 GBP
StarTech.com USB Stereo Audio Adaptors - StarTech.com ICUSBAUDIO2D, The ICUSBAUDIO2D External USB Sound Card from StarTech.com lets you add an S/PDIF digital audio output and standard 3.5mm analogue audio/microphone connections to your system through USB, offering a convenient way to bypass or replace an internal sound card without having to open the computer case.For home-theatre quality sound, the USB DAC (digital to analogue converter) offers 96KHz/24-bit sampling rates for both playback and recording, and a 3.5mm S/PDIF port with support for Dolby® Digital 5.1 surround sound (AC3) and DTS® pass-through. This versatile USB audio adaptor features an integrated 3.5mm 4-position TRRS connection for your headphones or combination headset/microphone. There is also a convenient external volume control for quick adjustments, a hardware EQ switch for Bass or Treble boosting, and an LED status bar to display the current sampling rate.This product is backed by a 2-year warranty and free lifetime technical support. StarTech.com ICUSBAUDIO2D USB Stereo Audio Adapter External Sound Card
StarTech.com HD2VGAMicro HDMI To VGA Small Form Factor - No Extern...
28.22 GBP
StarTech.com HDMI to VGA Adaptor Cables - StarTech.com HD2VGAMICRO, With this HDMI to VGA converter from StarTech.com you can connect an HDMI output from your Chromebook, Ultrabook or laptop computer to a VGA monitor or projector.To ensure compatibility with your Samsung® Chromebook the HD2VGAMICRO has been extensively tested in wide range of applications, making the video adaptor an ideal converter to connect your Chromebook to any VGA display. With no external power adaptor required, and a small form factor design, this portable adaptor is a great accessory to have in your laptop carrying case. It supports plug-and-play installation, which speeds up the installation time and eliminates the worry of having driver software ready on any computer.The converter delivers maximum video quality, with support for resolutions up to 1920 x 1200/1080p providing a convenient solution for boosting productivity by extending your computer's desktop onto a secondary monitor.The HD2VGAMICRO is backed by a 2-year warranty and free lifetime technical support. StarTech.com HD2VGAMicro HDMI To VGA Small Form Factor - No External Power
StarTech.com HD2VGAMM6 HDMI To VGA Cable Without Audio - 6ft
38.4 GBP
StarTech.com HDMI to VGA Adaptor Cables - StarTech.com HD2VGAMM6, This HDMI to VGA converter cable from StarTech.com lets you connect your HDMI equipped Chromebook™, laptop or desktop to a VGA monitor or projector, with no additional adaptors or cables required.The converter cable saves you the hassle of combining an HDMI to VGA adaptor with a bulky VGA cable by providing an end-to-end solution for connecting your digital HDMI computer to your VGA monitor or projector.Unlike most HDMI to VGA adaptors which require a power outlet to convert the video signal, the HD2VGAMM6 doesn't need external power in most installations. To work with Mac computers where extra power is needed, the HD2VGAMM6 features an optional integrated USB power source (USB cable not included).In the past, converting digital HDMI to analogue VGA was a difficult and expensive task. Now, you can avoid upgrade costs by connecting your HDMI video source to your existing VGA monitor or projector using the HD2VGAMM6. Plus, because the adaptor cable supports video resolutions up to 1920 x 1200 or 1080p, you can rest assured you can use your existing VGA display while maintaining high-definition video quality.The converter cable delivers a precise 6ft connection that eliminates the clutter of excess cable length and ensures a tidy, professional installation. It is backed by a 2-year warranty and free lifetime technical support. StarTech.com HD2VGAMM6 HDMI To VGA Cable Without Audio - 6ft
StarTech.com StarTech HDMIDVIFM HDMI To DVI-D Video Cable Adaptor - F/M
18.08 GBP
StarTech.com HDMI To DVI-D Video Cable Adaptor Range - StarTech.com HDMIDVIFM, The StarTech.com HDMIDVIFM HDMI to DVI-D video cable adaptor features 1 x HDMI female connector and 1 x DVI-D male connector, which enables a bi-directional connection between HDMI devices and DVI-D devices to overcome compatibility issues. You can connect an HDMI source to a DVI-D display or connect a DVI-D source to an HDMI display.Backed by the StarTech.com lifetime warranty. StarTech HDMIDVIFM HDMI To DVI-D Video Cable Adaptor - F/M
Digitus AK-340418-002-S AV Converter DisplayPort HDMI DVI VGA 4K A...
27.75 GBP
Digitus-Conrad-DisplayPort-plug-658114-Digitus-AK-340418-002-S-Digitus-AK-340418-002-S-is-a-versatile-AV-converter-that-supports-the-seamless-conversion-of-video-signals-from-DisplayPort-HDMI-DVI-and-VGA-interfaces-to-a-4K-display-output-making-it-an-essential-solution-for-engineers-handling-multiple-display-standards-Featuring-audio-support-for-enhanced-media-integration-this-device-ensures-compatibility-with-a-wide-range-of-audio-visual-systems-The-converter-is-particularly-useful
StarTech.com StarTech HDMIDVIMF HDMI To DVI-D Video Cable Adaptor - M/F
18.08 GBP
StarTech.com HDMI To DVI-D Video Cable Adaptor Range - StarTech.com HDMIDVIMF, The StarTech.com HDMIDVIMF HDMI to DVI-D video cable adaptor features 1 x HDMI male connector and 1 x DVI-D female connector, and enables a bi-directional connection between HDMI devices and DVI-D devices to overcome compatibility issues. You can connect an HDMI source to a DVI-D display or connect a DVI-D source to an HDMI display.Backed by the StarTech.com lifetime warranty. StarTech HDMIDVIMF HDMI To DVI-D Video Cable Adaptor - M/F
StarTech.com SAT2MSAT25 2.5in SATA To Mini SATA SSD Adapter Enclosure
32.79 GBP
StarTech.com SATA/SSD Adapter Converters and Enclosures - StarTech.com SAT2MSAT25, This 2.5in SATA to Mini SATA SSD adaptor enclosure from StarTech.com turns an mSATA (Mini SATA) mini-SSD into a standard 2.5in SATA SSD for use anywhere a 2.5in SATA drive can be used.To maximise performance and utilise the full speed potential of SATA III hard drives, this HDD Backplane supports SATA III for transfer speeds up to 6 Gbps when paired with compatible controller.Featuring all the standard mounting points that a normal 2.5in hard drive uses, the converter can be installed into External Hard Drive Enclosures, Hard Drive Docking Stations or into desktop or laptop computers.The enclosure also features a unique design that enables seamless data pass-through with no conversion bottlenecks, enabling the mSATA drive to work as fast as it's allowed by the host system/interface.Constructed from aluminium and plastic, this converter is backed by a 2-year warranty and free lifetime technical support. StarTech.com SAT2MSAT25 2.5in SATA To Mini SATA SSD Adapter Enclosure
StarTech.com 25SAT22MSAT Dual mSATA SSD To 2.5” SATA RAID Adapter ...
37.27 GBP
StarTech-com-25SAT22MSAT-Dual-mSATA-SSD-To-2-5in-SATA-RAID-Adaptor-Converter-StarTech-com-25SAT22MSAT-P-The-25SAT22MSAT-mSATA-to-SATA-adaptor-from-StarTech-com-enables-you-to-increase-the-performance-of-your-system-vastly-by-adding-a-dual-mSATA-SSD-RAID-array-into-any-2-5in-SATA-hard-disc-drive-bay-P-You-can-reduce-your-data-transfer-bottleneck-with-file-transfer-speeds-up-to-6Gbps-by-utilising-the-full-potential-of-your-SATA-III-controller-and-reduce-power-consumption-too-by-using-SSDs-in
Renkforce RF-3301142 DisplayPort/DVI Adapter cable Black 1.00 m sc...
11.65 GBP
Renkforce Audio & Visual Cables 652118 - Renkforce RF-3301142, Renkforce RF-3301142 is a DisplayPort to DVI adapter cable designed to provide seamless connectivity between devices requiring video signal exchange. This black cable is 1.00 metre in length and features a DisplayPort plug and a DVI-D 24+1-pin plug, catering to a variety of audio and visual applications. The cable is screwable, ensuring a secure connection that minimises signal loss and maximises transfer stability. It is ideal for connecting modern computers and graphics cards with DisplayPort outputs to older monitors or projectors that accept DVI inputs, often found in engineering environments where legacy systems are still in use. Its robust construction makes it suitable for professional settings, where reliable and high-quality visual data transmission is critical. Renkforce RF-3301142 DisplayPort/DVI Adapter cable Black 1.00 m screwable
StarTech.com ST124HDMI2 4-port HDMI splitter and signal amplifier
172.8 GBP
StarTech.com HDMI Splitters - StarTech.com ST124HDMI2, This 4 Port High Speed HDMI Video Splitter with Audio from StarTech.com enables you to share a single HDMI source with up to 4 HDMI or DVI-D enabled displays/receivers without sacrificing image or sound quality. Mounting brackets are included for a tidy, professional installation.Supporting true HD video resolutions up to 1080p, this HDMI splitter allows you to situate your HDMI-capable displays up to 5m away from the splitter. This versatile HDMI splitter features 3.5mm audio input and output connections giving you the option of sending your accompanying audio signal through the HDMI cable or through a separate 3.5mm stereo audio channel.A perfect addition to virtually any application requiring the high quality video delivered by HDMI devices, the ST124HDMI2 video splitter is easy to install and provides flawless, distortion-free digital video.It is backed by a 2-year warranty and free lifetime technical support. StarTech.com ST124HDMI2 4-port HDMI splitter and signal amplifier