Time delay circuit which is voltage independent

Details Time delay circuit which is voltage independent Time delay circuit which is voltage independent

1998-08-24

2000-11-21

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Having specific delay in producing output waveform

327264, H03H 1126

Patent

active

061508640

ABSTRACT:
A time delay circuit that produces a constant delay and is independent of supply voltage. The time delay circuit has a current mirror circuit, a voltage shift circuit, an inverter and a capacitor. The inverter will trip at a predetermined voltage level. A capacitor is coupled to the current mirror circuit and to the inverter for generating a portion of the delay time. A voltage shift circuit is coupled to the inverter for approximately mirroring a voltage shift in the current mirror circuit thereby allowing the time delay circuit to be voltage independent.

REFERENCES:
patent: 5057722 (1991-10-01), Kobatake
patent: 5926042 (1999-07-01), Talaga, Jr.
patent: 5929681 (1999-07-01), Suzuki

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