Harness, Dickey & Pierce, P.L.C.
AC line powered relay driving circuits
Disclosed are exemplary embodiments of relay drive circuits. In an exemplary embodiment, a relay drive circuit generally includes a first diode, a second diode, a third diode, a first transistor, a second transistor, a first capacitor, and a second capacitor. The relay drive circuit is operable to transform an AC voltage to a DC voltage, and then use the DC voltage to control on/off of the relay.
Emerson Electric Co.
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Xingeng Cuiyun
Zhou Chen