Microwave multiplying D/A converter

A digital to analog converter circuit for use at RF frequencies includes an input transimpedance buffer receiving an RF input. A complimentary switched R2R ladder network is coupled to the input buffer at one end and to an output transimpedance circuit at its other end. The output transimpedance circuit has an extremely low impedance and provides an RF output. The switched ladder network is formed of transistors and includes a complimentary switch to maintain current and voltage regardless of the transistor states. A bi-phase D/A converter uses a mirrored complimentary switched R2R ladder network coupled between a phase splitter and the output transimpedance circuit.