Adjustable delay circuit

Details Adjustable delay circuit Adjustable delay circuit

1998-07-29

2000-09-26

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Having specific delay in producing output waveform

327287, 327283, H03K 5159, H03K 5153

Patent

active

061247464

ABSTRACT:
An adjustable delay circuit, for a logic input signal, comprises circuitry for charging a capacitance at a first constant current when the logic signal switches to a first logic state; circuitry for discharging the capacitance at a second constant current when the logic signal switches to the second logic state; circuitry for stopping charging and discharging of the capacitance between the moment when the voltage across the capacitance reaches a high threshold or a low threshold and a subsequent switching of the logic signal; and a first comparator connected to switch the state of an output signal when the voltage across the capacitance crosses a third threshold included between the first and second thresholds.

REFERENCES:
patent: 4620312 (1986-10-01), Yamashita
patent: 4812687 (1989-03-01), Larson et al.
patent: 4893036 (1990-01-01), Hester et al.
patent: 5025176 (1991-06-01), Takeno
patent: 5066877 (1991-11-01), Hamano et al.
patent: 5461335 (1995-10-01), Tsuchiva
patent: 5594377 (1997-01-01), Choi et al.

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