The NE612 was an integrated circuit for processing of signals, such as in the transmission of radio signals. It consists of an oscillator and a mixer. It could handle signal frequencies of up to 500 MHz and local oscillator frequencies of up to 200 MHz. The mixer was a “Gilbert cell” multiplier configuration which provides both a gain of 14 dB and a noise figure of 5 dB at 45 MHz. The IC belongs to a family of the following ICs: NE602, SA602, NE612 and SA612. It was widely used in amateur radio applications, e.g. in the commercial Elecraft products, and others.
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