Data processing: measuring – calibrating – or testing – Testing system – Signal generation or waveform shaping
Patent
1993-05-03
1998-11-24
Cosimano, Edward R.
Data processing: measuring, calibrating, or testing
Testing system
Signal generation or waveform shaping
324 731, 371 271, G01R 3102
Patent
active
058421556
ABSTRACT:
A method and apparatus for adjusting charging and discharging currents of a pin driver to optimize slew rates and overshoot for different types of logic circuits. The current charging and discharging circuits include respective transistors that are mirrored to a transistor whose current varies in accordance with VH-VL where VH and VL are programmed reference voltages defining the high and low voltage levels of the output driver pulses. Thus, when VH-VL is relatively large such as for CMOS outputs, slew rates are relatively high. However, when VH-VL is relatively small such as for ECL outputs, slew rates are reduced to prevent excessive overshoot.
REFERENCES:
patent: Re31056 (1982-10-01), Chau et al.
patent: 4070565 (1978-01-01), Borrelli
patent: 4439858 (1984-03-01), Petersen
patent: 4500993 (1985-02-01), Jacobson
patent: 4583223 (1986-04-01), Inoue et al.
patent: 4635259 (1987-01-01), Schinabeck et al.
patent: 4637020 (1987-01-01), Schinabeck
patent: 4646299 (1987-02-01), Schinabeck et al.
patent: 4724378 (1988-02-01), Murray et al.
patent: 4837502 (1989-06-01), Ugenti
patent: 5202639 (1993-04-01), McKeon et al.
patent: 5377202 (1994-12-01), Bryson et al.
Bryson Stephen W.
Kondo Alan T.
Lee Don N.
Atwood Pierce
Cosimano Edward R.
Fairchild Semiconductor Corp.
LandOfFree
Method and apparatus for adjusting pin driver charging and disch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for adjusting pin driver charging and disch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for adjusting pin driver charging and disch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1714760