Low voltage-controlled, stand-by electronic circuit with delayed

Details Low voltage-controlled, stand-by electronic circuit with delayed Low voltage-controlled, stand-by electronic circuit with delayed

1989-05-25

1990-04-17

Wong, Peter S.

Electricity: power supply or regulation systems

External or operator controlled

Using a three or more terminal semiconductive device as the...

323317, 307597, G05F 316

Patent

active

049183702

ABSTRACT:
This low voltage-controlled, stand-by electronic circuit with delayed switch off, comprises a switching circuit defining a stand-by input receiving a stand-by switching signal and an output, and a delay circuit generating a delayed switch off signal. The switching circuit comprises a controlled current source having two control inputs, one whereof is connected to the stand-by input for switching on the controlled current source upon receiving the stand-by switching signal and the other of the inputs is connected to the delay circuit. The delay circuit is also connected to the stand-by input and receives therefrom the stand-by switching signal for generating the delayed switch off signal, so that the controlled current source is switched on upon receiving the stand-by switching signal and remains on in absence of the stand-by switching signal and of the delayed switch off signal, the controlled current source being switched off by the delayed switch off signal on the second control input.

REFERENCES:
patent: 2923863 (1960-02-01), Chesson et al.
patent: 3721832 (1973-03-01), Lee
patent: 3784881 (1974-01-01), Van Horn et al.
patent: 4639661 (1987-01-01), Williams et al.
patent: 4810902 (1989-03-01), Storti et al.

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