A GaAs RF amplifier IC for UHF TV tuners

The design and performance of a monolithic GaAs RF amplifier IC with a bias circuit, for application in UHF TV/VTR tuners, are presented. This IC can reduce the area of an RF amplifier to less than half of the size of a conventional amplifier. It has a sufficiently wide range of variation in sheet resistance and threshold voltage to obtain a satisfactory yield. The noise figure of the TV tuner using the present IC is lower than that of the conventional tuner by more than 1.5 dB. Excellent crossmodulation characteristics are obtained at the same time. >