公开(公告)号：US3916412A

公开(公告)日：1975-10-28

申请号：US50172774

申请日：1974-08-29

Applicant: UNITED TECHNOLOGIES CORP

Inventor： AMOROSO JR SALVATORE

IPC: H04B1/40 ,  H04B1/50

CPC classification number: H04B1/50 ,  H04B1/408

Abstract: A transceiver, adapted for use as either a master or a slave in a duplex pair, has a single, voltage-tunable, solid state oscillator to provide the carrier frequency wave, a small portion of which is mixed with the received wave and applied therewith to a single ended mixer; an AGC-controlled loop cancels transmitter input modulation from the receiver output. The oscillator of the master transceiver is locked to a desired carrier frequency by a feedback loop including a tuning cavity adjusted to a frequency different from that of the slave transceiver by the common IF frequency; the slave transceiver is first locked to the frequency of its tuning cavity and thereafter, upon sensing output from its IF amplifier (from the master), is switched to operate in response to AFC controlled by the received signal, such that the master and slave transceivers are locked together at frequencies differing by their common IF frequency. A single integrating amplifier provides demodulator and AFC filtering and, together with a bistable device, initial sweeping of the oscillator control voltage.

Abstract translation: 适用于双工对中的主器件或从器件的收发器具有单个电压可调谐的固态振荡器，以提供载波频率波，其中一小部分与接收的波混合并与其一起施加 到单端混合器; AGC控制环路从接收机输出消除发射机输入调制。 主收发器的振荡器通过反馈回路锁定到期望的载波频率，该反馈回路包括通过公共IF频率调整到与从机收发器不同的频率的调谐腔; 从属收发器首先被锁定到其调谐腔的频率，此后，在感测到来自其中频放大器（从主机）的输出时，被切换为响应于由接收信号控制的AFC进行操作，使得主从收发器 以不同于其共同的中频频率的频率锁定在一起。 单个积分放大器提供解调器和AFC滤波器，并与双稳态器件一起初始扫描振荡器控制电压。