TRANSMISSION-N-MULTIPLEXED SUPERHETERODYNE RECEIVER OF COMMUNICATION ENGINEERING APPARATUS

摘要

PURPOSE: To provide a transmitting device S providing an N-fold super heterodyne reception device E as against a communication technique device G, where an intermediate frequency signal does not have a modulation signal component by the transmission device S in addition to the modulation of a reception signal ES. CONSTITUTION: A compensating device K has a frequency control circuit where a voltage-controlled oscillator VCO is provided, the target frequency of the oscillator corresponds to the sum of a first intermediate frequency and the second intermediate frequency or difference between them and the oscillator is connected to a second reception mixer EM2.