Title :
A 3 chip GaAs double conversion TV tuner system with 70 dB image rejection
Author :
Ducourant, Thierry ; Philippe, Pascal ; Dautriche, Pierre ; Pauker, Vlad ; Villalon, Claudine ; Pertus, Marcel ; Damour, Jean-Pierre
Author_Institution :
Lab. d´´Electron et de Phys. Appl., Limeil-Brevannes, France
Abstract :
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.<>
Keywords :
III-V semiconductors; MMIC; field effect integrated circuits; frequency convertors; gallium arsenide; hybrid integrated circuits; television receivers; tuning; 0.7 micron; 1.9 GHz; 30 dB; 35 MHz; 70 dB; Al/sub 2/O/sub 3/ substrate; GaAs; MESFET; MMIC; TV tuner system; VHF-UHF; conversion gain; double frequency conversion method; image frequency rejection mixer; image rejection; image rejection downconverter; measurements data; narrowband amplifier; phase shifter; semiconductors; smoothing filter; three chip system; upconverter; Filters; Frequency conversion; Gain; Gallium arsenide; Image converters; Mixers; Narrowband; Smoothing methods; TV; Tuners;
Conference_Titel :
Microwave and Millimeter-Wave Monolithic Circuits Symposium, 1989. Digest of Papers., IEEE 1989
Conference_Location :
Long Beach, CA, USA
DOI :
10.1109/MCS.1989.37269
