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TW200520381A - Apparatus and method for adjusting the impedance of an output driver - Google Patents

Apparatus and method for adjusting the impedance of an output driver

Info

Publication number
TW200520381A
TW200520381A TW093107376A TW93107376A TW200520381A TW 200520381 A TW200520381 A TW 200520381A TW 093107376 A TW093107376 A TW 093107376A TW 93107376 A TW93107376 A TW 93107376A TW 200520381 A TW200520381 A TW 200520381A
Authority
TW
Taiwan
Prior art keywords
impedance
output
generator
bias
controller
Prior art date
Application number
TW093107376A
Other languages
Chinese (zh)
Other versions
TWI236217B (en
Inventor
James R Lundberg
Original Assignee
Ip First Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US10/730,425 external-priority patent/US6949949B2/en
Application filed by Ip First Llc filed Critical Ip First Llc
Publication of TW200520381A publication Critical patent/TW200520381A/en
Application granted granted Critical
Publication of TWI236217B publication Critical patent/TWI236217B/en

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  • Logic Circuits (AREA)
  • Networks Using Active Elements (AREA)

Abstract

An output impedance bias compensation system for adjusting output impedance of at least one output including a reference impedance generator, an impedance matching controller, at least one output impedance generator, and a programmable bias controller. The reference impedance generator develops a reference impedance based on a reference value. The impedance matching controller continually adjusts an input of the reference impedance generator to match the reference value within a predetermined tolerance. Each output impedance enerator is coupled to a corresponding output and is controlled by an output impedance control input. The programmable bias controller combines a bias amount with the value of the input of the reference impedance generator to provide the output impedance control input. The bias controller is programmable to provide a bias amount to compensate for any process variations between the reference impedance generator and each output impedance generator.
TW93107376A 2003-12-05 2004-03-19 Apparatus and method for adjusting the impedance of an output driver TWI236217B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/730,425 US6949949B2 (en) 2002-12-17 2003-12-05 Apparatus and method for adjusting the impedance of an output driver

Publications (2)

Publication Number Publication Date
TW200520381A true TW200520381A (en) 2005-06-16
TWI236217B TWI236217B (en) 2005-07-11

Family

ID=34377727

Family Applications (1)

Application Number Title Priority Date Filing Date
TW93107376A TWI236217B (en) 2003-12-05 2004-03-19 Apparatus and method for adjusting the impedance of an output driver

Country Status (2)

Country Link
CN (1) CN100468969C (en)
TW (1) TWI236217B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111416603A (en) * 2019-01-04 2020-07-14 瑞昱半导体股份有限公司 Transmission gate circuit

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102045054B (en) * 2009-10-13 2013-04-24 晨星软件研发(深圳)有限公司 Method and related device for correcting output/input circuit
US9691443B2 (en) * 2014-11-17 2017-06-27 Micron Technology, Inc. Apparatuses and methods for compensating for process, voltage, and temperature variation in a memory
TWI719891B (en) * 2020-04-22 2021-02-21 瑞昱半導體股份有限公司 Bias compensation device and method for operating a bias compensation device
CN119892011B (en) * 2025-03-26 2025-08-29 牛芯半导体(深圳)有限公司 Resistance adjustment circuit and resistance adjustment method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111416603A (en) * 2019-01-04 2020-07-14 瑞昱半导体股份有限公司 Transmission gate circuit
CN111416603B (en) * 2019-01-04 2023-03-24 瑞昱半导体股份有限公司 Transmission gate circuit

Also Published As

Publication number Publication date
TWI236217B (en) 2005-07-11
CN1553569A (en) 2004-12-08
CN100468969C (en) 2009-03-11

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