Electronic digital logic circuitry – Function of and – or – nand – nor – or not – Bipolar transistor
Patent
1995-01-19
1996-03-12
Westin, Edward P.
Electronic digital logic circuitry
Function of and, or, nand, nor, or not
Bipolar transistor
326 93, 327 52, H03K 19086
Patent
active
054989825
ABSTRACT:
A method and apparatus for reducing aperture uncertainty and kick-back noise in high speed comparators is disclosed. The disclosed method is used in a comparator for comparing a first signal (INP) and a second signal (INM) and having a track mode and a regenerative mode of operation. The steps of this method are as follows. A first input current representing the first signal is switched through a first output node (OUTP) during the track mode and a second input current representing the second signal is switched through a second output node (OUTM) during the track mode. During the regenerative mode, approximately half of the first input current is switched through the first output node (OUTP) and approximately half of the first input current is switched through the second output node (OUTM). Also during the regenerative mode, approximately half of the second input current is switched through the first output node and approximately half of the second input current is switched through the second output node.
REFERENCES:
patent: 4810908 (1989-03-01), Suzuki et al.
patent: 5065050 (1991-11-01), Fernandez
patent: 5329189 (1994-07-01), Ushida et al.
Underwood; "Cascode Current Switch ALU"; IBM Technical Disclosure Bulletin; vol. 21, No. 12; May 1979; pp. 4808-4810.
Gopinathan Venugopal
Izzard Martin J.
Donoladson Richard L.
Driscoll Benjamin D.
Hiller William E.
Rutkowski Peter T.
Texas Instruments Incorporated
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