Chip K174PS4

The K174PS4 microcircuit is a double balanced mixer.
It is intended for use as a frequency mixer in the frequency range up to 1000 MHz, a modulator, an amplifier in blocks of channel selectors for UHF TVs.
It differs from mixers on discrete devices by the absence or attenuation of components with signal and local oscillator frequencies in the output signal spectrum and good decoupling between the local oscillator circuit and the input. The leakage of the local oscillator voltage to the input of the receiver is 40-50 dB.