公开(公告)号：US3925688A

公开(公告)日：1975-12-09

申请号：US54515875

申请日：1975-01-29

Applicant: RCA CORP

Inventor： KALFUS MARTIN AARON

IPC: H03K17/13 ,  H03K17/72

CPC classification number: H03K17/136

Abstract: An input signal having a period T is applied to a series connected load and triggerable bidirectional switch. A zero crossing detector provides a trigger pulse at each axis crossing of either the input signal or the voltage across the switch. A circuit, including a monostable multivibrator triggered at alternate axis crossings of the input signal and having an ONperiod between T/2 and T, applies the detector trigger pulses to the switch during the ON-period. Triggering of the multivibrator is controlled by a further circuit so that switching at the zero crossings of the input signal or the potential across the switch for an integral number of cycles is thereby provided during the period that the multivibrator is triggered.

Abstract translation: 具有周期T的输入信号被施加到串联连接的负载和可触发的双向开关。 过零检测器在切换开关的输入信号或电压的每个轴交叉处提供触发脉冲。 包括在输入信号的交替轴交叉处触发并具有T / 2和T之间的导通周期的单稳态多谐振荡器的电路在接通时段期间将检测器触发脉冲施加到开关。 多谐振荡器的触发由另一个电路控制，从而在多谐振荡器被触发的时间段期间提供在输入信号的零交叉处或开关两端的电位之间进行整数倍的切换。