TW200701641A - Pre-buffer level shifter and output buffer apparatus - Google Patents

Pre-buffer level shifter and output buffer apparatus

Info

Publication number
TW200701641A
TW200701641A TW094120383A TW94120383A TW200701641A TW 200701641 A TW200701641 A TW 200701641A TW 094120383 A TW094120383 A TW 094120383A TW 94120383 A TW94120383 A TW 94120383A TW 200701641 A TW200701641 A TW 200701641A
Authority
TW
Taiwan
Prior art keywords
buffer
level shifter
current
clamping circuit
output
Prior art date
Application number
TW094120383A
Other languages
Chinese (zh)
Other versions
TWI271034B (en
Inventor
Chih-Hung Wu
Meng-Jer Wey
Chien-Hui Chuang
Original Assignee
Faraday Tech Corp
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
Application filed by Faraday Tech Corp filed Critical Faraday Tech Corp
Priority to TW94120383A priority Critical patent/TWI271034B/en
Publication of TW200701641A publication Critical patent/TW200701641A/en
Application granted granted Critical
Publication of TWI271034B publication Critical patent/TWI271034B/en

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  • Logic Circuits (AREA)
  • Electronic Switches (AREA)

Abstract

A pre-buffer level shifter and an output buffer apparatus are provided. The pre-buffer level shifter includes a switch-able current source, a current mirror, a buffer unit, a first and a second clamping circuit. The switch-able current source determines to provide a current to one of a first and a second current terminal of the current mirror according to a first data signal at a control terminal of the switch-able current source. The first clamping circuit and the buffer unit couple to the second current terminal of the current mirror. The second clamping circuit couples to an output terminal of the buffer unit. In the pre-buffer level shifter comprising thin oxide MOS transistor devices, the present invention can control the voltage swing of signal driving an output buffer within a suitable voltage range by using the clamping circuit. Thus, the pre-buffer level shifter can drive the output buffer made up of thin oxide MOS transistor devices correctly, and increase the operating speed and ensure the reliability thereof.
TW94120383A 2005-06-20 2005-06-20 Pre-buffer level shifter and output buffer apparatus TWI271034B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TW94120383A TWI271034B (en) 2005-06-20 2005-06-20 Pre-buffer level shifter and output buffer apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW94120383A TWI271034B (en) 2005-06-20 2005-06-20 Pre-buffer level shifter and output buffer apparatus

Publications (2)

Publication Number Publication Date
TW200701641A true TW200701641A (en) 2007-01-01
TWI271034B TWI271034B (en) 2007-01-11

Family

ID=38430344

Family Applications (1)

Application Number Title Priority Date Filing Date
TW94120383A TWI271034B (en) 2005-06-20 2005-06-20 Pre-buffer level shifter and output buffer apparatus

Country Status (1)

Country Link
TW (1) TWI271034B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8487687B2 (en) 2010-01-27 2013-07-16 Novatek Microelectronics Corp. Output buffer circuit and method for avoiding voltage overshoot
TWI578707B (en) * 2016-04-15 2017-04-11 台灣類比科技股份有限公司 Voltage level shifter circuit
TWI711275B (en) * 2018-02-12 2020-11-21 美商半導體組件工業公司 A level-shifting circuit configured to limit leakage current and method for operating circuits

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8487687B2 (en) 2010-01-27 2013-07-16 Novatek Microelectronics Corp. Output buffer circuit and method for avoiding voltage overshoot
USRE47743E1 (en) 2010-01-27 2019-11-26 Novatek Microelectronics Corp. Output buffer circuit and method for avoiding voltage overshoot
TWI578707B (en) * 2016-04-15 2017-04-11 台灣類比科技股份有限公司 Voltage level shifter circuit
TWI711275B (en) * 2018-02-12 2020-11-21 美商半導體組件工業公司 A level-shifting circuit configured to limit leakage current and method for operating circuits
US11025238B2 (en) 2018-02-12 2021-06-01 Semiconductor Components Industries, Llc Level-shifting circuit configured to limit leakage current

Also Published As

Publication number Publication date
TWI271034B (en) 2007-01-11

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees