High frequency transmitter with controlled output power - uses switched digital reference level to control output power

摘要

The transmitter has a controllable amplific (V1), HF power amplifier (V2), coupling circuit (RK) to sample proportion of output signal, rectifier (G), inverting amplifier (V3), and regulated amplifier (V4). A reference transmitter with digital inputs and digital to analog convertic (D/A) provides an output signal that is switched and controlled by switching input (E). The input signal (E) is also converted to an impulse threshold circuit (Q1). USE/ADVANTAGE - HF Transmitters. Overall size and cost reductio