公开(公告)号：US3925729A

公开(公告)日：1975-12-09

申请号：US50172274

申请日：1974-08-29

Applicant: UNITED TECHNOLOGIES CORP

Inventor： AMOROSO 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 slave transceiver is locked to a desired carrier frequency by a feedback loop including a tuning cavity adjusted to the same frequency as that of the master transceiver; the slave transceiver is first locked to a frequency on the skirt of its tuning cavity, differing from the center frequency of its tuning cavity by the common IF frequency 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 unilaterally-effective bistable device, initial sweeping of the oscillator control voltage to achieve skirt tuning in the slave mode or center tuning in the master mode.

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。 从收发器的振荡器通过包括调谐到与主收发器相同频率的调谐腔的反馈回路锁定到期望的载波频率; 从属收发器首先被锁定在其调谐腔的裙边上的频率上，与其调谐腔的中心频率不同于公共IF频率，此后，在感测到来自其IF放大器（从主机）的输出时，切换到 响应于由接收信号控制的AFC操作，使得主和从收发器在不同于其公共IF频率的频率处锁定在一起。 单个积分放大器提供解调器和AFC滤波器，以及单向有效双稳态器件，初始扫描振荡器控制电压，以实现从模式中的裙部调谐或主模式中的中心调谐。