公开(公告)号：US3659210A

公开(公告)日：1972-04-25

申请号：US3659210D

申请日：1970-10-26

Applicant: ERICSSON TELEFON AB L M

Inventor： NILSSON NILS LENNART

IPC: H03D13/00

CPC classification number: H03D13/008

Abstract: Phase detection circuit, which in the state of a voltage value indicates the difference between the phase of an incoming signal and the phase of a reference signal. The circuit is built up by an operational amplifier with two inputs, one of them inverting the phase of the incoming signal. The incoming signal is fed to both inputs of the amplifier, whereby the signal is fed to the not inverting input via a switch which is controlled by the reference signal in such a manner that it alternatively lets through and blocks up the incoming signal during every other half period of the reference signal. The amplifier is so dimensioned that the amplification of signals fed to the inverting input is as high or lower than the amplification of signals fed to the other input.

Abstract translation: 在电压值状态下的相位检测电路表示输入信号的相位与参考信号的相位之差。 该电路由具有两个输入的运算放大器构成，其中一个反相输入信号的相位。 输入信号被馈送到放大器的两个输入端，由此信号通过由参考信号控制的开关馈送到非反相输入端，使得它可以在每隔一个时间通过并阻塞输入信号 参考信号的半周期。 放大器的尺寸如此，使得馈送到反相输入端的信号的放大率高于或低于馈送到另一输入端的信号的放大。