Track and hold amplifiers and digital calibration for analog-to-digital converters

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8350738
APP PUB NO 20120188109A1
SERIAL NO

13010285

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An exemplary differential track and hold amplifier includes a track stage including first and second linearized pairs connected in series at their respective inputs and in parallel at their respective outputs. The differential track and hold amplifier also includes a hold stage selectively coupled to the outputs of the first and second linearized pairs. The hold stage includes a unity gain buffer with feedback having a hold capacitor interconnected across its outputs. The differential track and hold amplifier also includes an output buffer coupled to the outputs of the hold stage. An exemplary analog-to-digital converter includes a differential track-and-hold amplifier, a voltage ladder, and a plurality of slices. Each of the slices in turn includes a differential preamplifier coupled to the track-and-hold amplifier and to a corresponding location on the voltage ladder; a current mode logic latch comparator coupled to the differential preamplifier; a large-swing latch coupled to the current mode logic latch comparator; a complementary metal oxide semiconductor latch having a dummy load; a calibration digital to analog converter connected across outputs of the differential preamplifier to inject calibration currents; and a register coupled to the calibration digital to analog converter and storing calibration values for use thereby. The analog-to-digital converter also includes a multiplexer which multiplexes outputs of the complementary metal oxide semiconductor latches down to a predetermined number of outputs.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
GLOBALFOUNDRIES INC.SUNNYVALE, CA16296

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Deniz, Zeynep Toprak Glen Oaks, US 5 32
Plouchart, Jean-Olivier New York, US 44 151
Sanduleanu, Mihai Adrian Tiberiu Yorktown Heights, US 33 161

Cited Art Landscape

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Other [Check patent profile for assignment information] (2)
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SAMSUNG ELECTRONICS CO., LTD. (1)
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5517141 Differential high speed track and hold amplifier 41 1995
 
NXP B.V. (2)
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THE TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK (1)
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UNIVERSITEIT GENT (1)
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* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
QUALCOMM INCORPORATED (1)
9035697 Split amplifiers with improved linearity 1 2013
 
NXP B.V. (2)
* 8830095 Track and hold circuit and method 1 2013
* 2013/0222,163 TRACK AND HOLD CIRCUIT AND METHOD 3 2013
 
MICROSEMI STORAGE SOLUTIONS (U.S.), INC. (1)
8823563 Calibration circuit for an analog-to-digital converter 0 2013
 
EMBEDDED SYSTEMS, LLC (1)
9065400 Programmable-gain instrumentation amplifier 0 2013
* Cited By Examiner

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