公开(公告)号：KR810000065B1

公开(公告)日：1981-02-04

申请号：KR770000090

申请日：1977-01-17

Applicant: MOTOROLA INC

Inventor： ANDREWS J ,  BETHARDS C

IPC: H04B1/40

Abstract: A compression amplifier processes both the audio modulating signal to the transmitter, and the audio output from the receiver, in a conventional amplitude modulated transceiver. Unique switching circuitry provides isolation between transmitter and receiver inputs to, and outputs from, the compression amplifier.

公开(公告)号：BR7701665A

公开(公告)日：1978-01-24

申请号：BR7701665

申请日：1977-03-18

Applicant: MOTOROLA INC

Inventor： BETHARDS C ,  ANDREWS J

IPC: H04B1/40 ,  A42B1/04 ,  G11B20/04 ,  H04B1/44 ,  H04B1/64 ,  H04B1/38

公开(公告)号：BR7701670A

公开(公告)日：1978-01-17

申请号：BR7701670

申请日：1977-03-18

Applicant: MOTOROLA INC

Inventor： BETHARDS C

IPC: H03C1/02 ,  H03G3/30 ,  H03G7/00 ,  H04B1/04 ,  H04B1/64 ,  H03G7/06

Abstract: An amplitude modulated transmitter includes an audio amplifier which, via a radio frequency (RF) power supply modulator, modulates an RF amplifier and carrier. Fluctuations in the direct current DC bias to the RF amp, such as are common in mobile applications, vary the modulation index of the transmitted signal.