Differential comparator cirucit
Abstract
A differential comparator circuit for an Analog-to-Digital Converter (ADC) or other application includes a plurality of differential comparators and a plurality of offset voltage generators. Each comparator includes first and second differentially connected transistor pairs having equal and opposite voltage offsets. First and second offset control transistors are connected in series with the transistor pairs respectively. The offset voltage generators generate offset voltages corresponding to reference voltages which are compared with a differential input voltage by the comparators. Each offset voltage is applied to the offset control transistors of at least one comparator to set the overall voltage offset of the comparator to a value corresponding to the respective reference voltage. The number of offset voltage generators required in an ADC application can be reduced by a factor of approximately two by applying the offset voltage from each offset voltage generator to two comparators with opposite logical sense such that positive and negative offset voltages are produced by each offset voltage generator.
- Inventors:
-
- Simi Valley, CA
- Issue Date:
- Research Org.:
- Technoconcepts, Inc. (Newbury Park, CA)
- OSTI Identifier:
- 870635
- Patent Number(s):
- 5563598
- Assignee:
- Technoconcepts, Inc. (Newbury Park, CA)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H03 - BASIC ELECTRONIC CIRCUITRY H03K - PULSE TECHNIQUE
H - ELECTRICITY H03 - BASIC ELECTRONIC CIRCUITRY H03M - CODING
- DOE Contract Number:
- FG03-92ER81459
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- differential; comparator; cirucit; circuit; analog-to-digital; converter; adc; application; plurality; comparators; offset; voltage; generators; differentially; connected; transistor; pairs; equal; opposite; offsets; control; transistors; series; respectively; generate; voltages; corresponding; reference; compared; input; applied; set; overall; value; respective; required; reduced; factor; approximately; applying; generator; logical; sense; positive; negative; produced; analog-to-digital converter; input voltage; reference voltage; voltage generator; reference voltages; value corresponding; comparator circuit; digital converter; differential comparator; differential input; /341/
Citation Formats
Hickling, Ronald M. Differential comparator cirucit. United States: N. p., 1996.
Web.
Hickling, Ronald M. Differential comparator cirucit. United States.
Hickling, Ronald M. Mon .
"Differential comparator cirucit". United States. https://www.osti.gov/servlets/purl/870635.
@article{osti_870635,
title = {Differential comparator cirucit},
author = {Hickling, Ronald M},
abstractNote = {A differential comparator circuit for an Analog-to-Digital Converter (ADC) or other application includes a plurality of differential comparators and a plurality of offset voltage generators. Each comparator includes first and second differentially connected transistor pairs having equal and opposite voltage offsets. First and second offset control transistors are connected in series with the transistor pairs respectively. The offset voltage generators generate offset voltages corresponding to reference voltages which are compared with a differential input voltage by the comparators. Each offset voltage is applied to the offset control transistors of at least one comparator to set the overall voltage offset of the comparator to a value corresponding to the respective reference voltage. The number of offset voltage generators required in an ADC application can be reduced by a factor of approximately two by applying the offset voltage from each offset voltage generator to two comparators with opposite logical sense such that positive and negative offset voltages are produced by each offset voltage generator.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 1996},
month = {Mon Jan 01 00:00:00 EST 1996}
}