Control circuit for HF transmitter of carrier frequency technique

摘要

The circuit contains a variable damping member in the useful signal path, and damper number controls dependent on preset characteristic magnitudes. A separate loop is provided for the control of amplifying and the output power at the circuit input (E) and output (A). Each loop couples a detection (Det 1,2) with identical transmission characteristic. Separate adjusting elements are provided for the amount of amplification, or for amplification and power. A temp. compensated diode summation circuit (D 1,2) is used, having an automatic change-over in dependence on the input signal level, for changing over between constant amplification mode and constant power mode.