Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Having specific delay in producing output waveform
Patent
1996-04-29
1999-02-09
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Having specific delay in producing output waveform
327161, H03H 1126
Patent
active
058699929
ABSTRACT:
A delay time control circuit controls delay times without a significant increase of power consumption or circuit components. The delay time control circuit for controlling delay times in a logic circuit includes a delay circuit having a plurality of serially connected gates, a pulse signal supplied to the delay circuit; a first group of gates which generates a reset pulse based on the pulse signal, a second group of gates which generates a set pulse based on the pulse signal, a flip-flop which is set by the set pulse and is reset by the reset pulse, an integrator which integrates an output signal of the flip-flop to produce an average voltage indicating a duty cycle of the output signal, a first delay time control voltage generator which compares the average voltage and a reference voltage indicating a delay time for the logic circuit and generates a first control voltage which is applied to the logic circuit, and a second delay time control voltage generator which receives the first control voltage and generates a second control voltage which is symmetrical to the first control voltage and is applied to the logic circuit.
REFERENCES:
patent: 4845390 (1989-07-01), Chan
patent: 4868514 (1989-09-01), Azevedo et al.
patent: 5179303 (1993-01-01), Searles et al.
patent: 5223755 (1993-06-01), Richley
patent: 5554946 (1996-09-01), Curran et al.
patent: 5554950 (1996-09-01), Molin
Advantest Corp.
Callahan Timothy P.
Nu Ton My-Trang
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