The RF9936 is a monolithic integrated receiver front-end for PCS applications. The IC contains all of the required components to implement the RF functions of the receiver front-end except for the passive filtering and LO generation. It contains two LNAs (low-noise amplifiers), a double-balanced Gilbert cell mixer, a balanced IF output, an LO isolation buffer amplifier, and an LO output buffer amplifier for providing the buffered LO signal as an output. On-chip digital logic is used to enable the appropriate LNA. The LNAs share a common output that permits insertion of a bandpass filter between the LNA output and the Mixer section. Analog gain adjustment is provided which allows 10dB variation in gain. The IC is designed to operate from a single 3.6V power supply.
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