Comparator circuits with local ramp buffering for a column-parallel single slope ADC
Abstract
A comparator circuit suitable for use in a column-parallel single-slope analog-to-digital converter comprises a comparator, an input voltage sampling switch, a sampling capacitor arranged to store a voltage which varies with an input voltage when the sampling switch is closed, and a local ramp buffer arranged to buffer a global voltage ramp applied at an input. The comparator circuit is arranged such that its output toggles when the buffered global voltage ramp exceeds the stored voltage. Both DC- and AC-coupled comparator embodiments are disclosed.
- Inventors:
- Issue Date:
- Research Org.:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1248813
- Patent Number(s):
- 9325335
- Application Number:
- 14/523,179
- Assignee:
- TELEDYNE SCIENTIFIC & IMAGING, LLC (Thousand Oaks, CA)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H03 - BASIC ELECTRONIC CIRCUITRY H03K - PULSE TECHNIQUE
H - ELECTRICITY H03 - BASIC ELECTRONIC CIRCUITRY H03M - CODING
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2014 Oct 24
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Citation Formats
Milkov, Mihail M. Comparator circuits with local ramp buffering for a column-parallel single slope ADC. United States: N. p., 2016.
Web.
Milkov, Mihail M. Comparator circuits with local ramp buffering for a column-parallel single slope ADC. United States.
Milkov, Mihail M. Tue .
"Comparator circuits with local ramp buffering for a column-parallel single slope ADC". United States. https://www.osti.gov/servlets/purl/1248813.
@article{osti_1248813,
title = {Comparator circuits with local ramp buffering for a column-parallel single slope ADC},
author = {Milkov, Mihail M.},
abstractNote = {A comparator circuit suitable for use in a column-parallel single-slope analog-to-digital converter comprises a comparator, an input voltage sampling switch, a sampling capacitor arranged to store a voltage which varies with an input voltage when the sampling switch is closed, and a local ramp buffer arranged to buffer a global voltage ramp applied at an input. The comparator circuit is arranged such that its output toggles when the buffered global voltage ramp exceeds the stored voltage. Both DC- and AC-coupled comparator embodiments are disclosed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 26 00:00:00 EDT 2016},
month = {Tue Apr 26 00:00:00 EDT 2016}
}
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Focal plane analog-to-digital converter
patent, January 1992
- Parrish, William J.
- US Patent Document 5,084,704
Ramp generator for image sensor ADC
patent, October 2005
- Bailey, Toby Edward Ralph
- US Patent Document 6,956,413
Ramp generators for imager analog-to-digital converters
patent, September 2007
- Lee, Yan
- US Patent Document 7,274,319
Rotary clock flash analog to digital converter system and method
patent, October 2009
- Wood, John
- US Patent Document 7,609,756
Image sensor ADC and CDS per column with oversampling
patent, May 2012
- Poonnen, Thomas; Zarnowski, Jeffrey; Liu, Li-Lin
- US Patent Document 8,169,517
Multichannel digitizer and method of digitizing
patent, October 2012
- Rao, Naresh Kesavan; Gruber, Nanette
- US Patent Document 8,294,607
Double data rate (DDR) counter, analog-to-digital converter (ADC) using the same, CMOS image sensor using the same and methods in DDR counter, ADC and CMOS image sensor
patent, March 2013
- Lim, Yong; Koh, Kyoung Min; Kim, Kyung Min
- US Patent Document 8,395,539
Apparatus and method for CDS and ADC with multiple samplings in image sensor
patent, June 2013
- Lee, Myoung-Su; Han, June-Soo
- US Patent Document 8,462,246
Mixed linear/square-root encoded single slope ramp provides a fast, low noise analog to digital converter with very high linearity for focal plane arrays
patent, January 2014
- Wrigley, Christopher J.; Hancock, Bruce R.; Newton, Kenneth W.
- US Patent Document 8,624,769
Image sensor with double integration time and conditional selection
patent, April 2014
- Noiret, Andy; Ligozat, Thierry
- US Patent Document 8,686,341
Analog-to-digital converter using a ramp generator
patent, May 2014
- Ay, Suat Utku
- US Patent Document 8,724,001
Comparator, analog-to-digital convertor, solid-state imaging device, camera system, and electronic apparatus
patent, July 2014
- Ueno, Yosuke
- US Patent Document 8,766,843
Ad conversion circuit and solid-state image pickup device
patent, September 2014
- Hagihara, Yoshio
- US Patent Document 8,823,575