Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Having specific delay in producing output waveform
Patent
1997-07-21
1999-08-10
Tran, Toan
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Having specific delay in producing output waveform
327288, 327263, 327278, H03K 513
Patent
active
059364513
ABSTRACT:
A reduced area delay circuit and method are disclosed. The delay circuit uses a constant current source and a constant current drain to charge and discharge a capacitor and thus control the delay time of the delay circuit. The constant current source and drain can be implemented using current mirrors formed by configuring MOSFET transistors in a common source configuration. The delay circuit method includes the steps of receiving an input signal, delaying the input signal by using a constant current source or drain in combination with a capacitor, and then buffering the voltage on the capacitor using two inverters. A programmable delay circuit is also disclosed by adding additional pairs of current mirrors to the delay circuit and selectively enabling the pairs to adjust the delay time.
REFERENCES:
patent: 4740743 (1988-04-01), Reisinger et al.
patent: 4806804 (1989-02-01), O'Leary
patent: 4812687 (1989-03-01), Larson et al.
patent: 4875020 (1989-10-01), Daniele et al.
patent: 5006738 (1991-04-01), Usuki et al.
patent: 5057722 (1991-10-01), Kobatake
patent: 5068628 (1991-11-01), Groshal
patent: 5081380 (1992-01-01), Chen
patent: 5175452 (1992-12-01), Lupi et al.
patent: 5227679 (1993-07-01), Woo
patent: 5231319 (1993-07-01), Crafts et al.
patent: 5300837 (1994-04-01), Fischer
patent: 5317219 (1994-05-01), Lupi et al.
patent: 5382840 (1995-01-01), Massoner
Capocelli Piero
Paparo Mario
Phillips William A.
Galanthay Theodore E.
Jorgenson Lisa K.
Larson Renee M.
Shin Eunja
STMicroeletronics, Inc.
LandOfFree
Delay circuit and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Delay circuit and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Delay circuit and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1123705