Transistor circuit with a self-holding circuit for a relay

Details Transistor circuit with a self-holding circuit for a relay Transistor circuit with a self-holding circuit for a relay

1994-10-13

1996-05-28

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

327215, H03K 3037

Patent

active

055215351

ABSTRACT:
A self-holding circuit is provided with an input terminal (2), an output terminal (3), a self returnable push switch (SW2), a first transistor TR1), a first time constant circuit (R3 and C1) having a predetermined charging time constant (T1), a second transistor (TR2), a relay (RL), first and second diodes (D1, D2), a second time constant circuit (R8, R9 and C2) having a predetermined discharging constant (T2), and a third transistor (TR3). The circuit may be switched on by a first pushing operation of the push switch and switched off by a second pushing operation of the same push switch.

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