具有70db图像抑制的3片GaAs双转换电视调谐器系统

Digest of Papers.,Microwave and Millimeter-Wave Monolithic Circuits Symposium Pub Date : 1989-06-12 DOI:10.1109/MCS.1989.37269

T. Ducourant, P. Philippe, P. Dautriche, V. Pauker, C. Villalon, M. Pertus, J.-P. Damour

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引用次数: 3

摘要

提出了一种采用0.7 μ m MESFET GaAs技术的全集成三芯片VHF-UHF电视调谐器系统。该系统基于双变频方法，由一个上变频器(IF/sub 1/=1.9 GHz)、一个平滑滤波器和一个图像抑制下变频器(IF/sub 2/=35 MHz)连接在氧化铝基板上。整个VHF-UHF频段的总转换增益为30 dB，抑制电平大于60 dB，仅在500 MHz处进行一次初步微调。提供了上变频窄带放大器、图像抑制混频器(IFRM)和移相器的测量数据。

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A 3 chip GaAs double conversion TV tuner system with 70 dB image rejection

A fully integrated three-chip VHF-UHF TV tuner system is presented that uses 0.7- mu m MESFET GaAs technology. The system, based on the double frequency conversion method, consists of an upconverter (IF/sub 1/=1.9 GHz), a smoothing filter, and an image rejection downconverter (IF/sub 2/=35 MHz) connected together on an alumina substrate. The total conversion gain is 30 dB and the rejection level is more than 60 dB throughout the VHF-UHF band with only one preliminary trimming at 500 MHz. Upconverter narrowband amplifier, image frequency rejection mixer (IFRM), and phase shifter measurements data are provided.<>

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Digest of Papers.,Microwave and Millimeter-Wave Monolithic Circuits Symposium

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