Presentation | 2011-11-28 CMOS Op-amp Offset Calibration Technique Using Closed Loop Offset Amplifier and Folded-Alternated Resistor String DAC Hiroyuki Morimoto, Hiroaki Goto, Hajime Fujiwara, Kazuyuki Nakamura, |
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PDF Download Page | PDF download Page Link |
Abstract(in Japanese) | (See Japanese page) |
Abstract(in English) | This paper describes the development of a circuit system that enables the offset calibration of an op-amp circuit after production. A closed-loop feedback system was developed to realize high-speed and accurate offset calibration action. For the D/A converter which occupies most of the area for the additional calibration circuit, the Folded-Alternated Resistor String DAC was developed. This reduced the area by and realized low power consumption while maintaining the same accuracy as a conventional type of DAC. The fabrication with standard 0.35μm CMOS, followed by actual measurement, has confirmed that the offset can be confined to no more than 1.5mV using the new calibration circuit. With this technique, miniaturization of a whole op-amp system can be achieved, because the layout size of each circuit consisting of op-amps can be reduced when using this offset correction circuit. |
Keyword(in Japanese) | (See Japanese page) |
Keyword(in English) | Op-amp / offset / calibration / D/A converter / Resistor sting |
Paper # | VLD2011-65,DC2011-41 |
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Conference Information | |
Committee | DC |
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Conference Date | 2011/11/21(1days) |
Place (in Japanese) | (See Japanese page) |
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Topics (in Japanese) | (See Japanese page) |
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Paper Information | |
Registration To | Dependable Computing (DC) |
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Language | JPN |
Title (in Japanese) | (See Japanese page) |
Sub Title (in Japanese) | (See Japanese page) |
Title (in English) | CMOS Op-amp Offset Calibration Technique Using Closed Loop Offset Amplifier and Folded-Alternated Resistor String DAC |
Sub Title (in English) | |
Keyword(1) | Op-amp |
Keyword(2) | offset |
Keyword(3) | calibration |
Keyword(4) | D/A converter |
Keyword(5) | Resistor sting |
1st Author's Name | Hiroyuki Morimoto |
1st Author's Affiliation | Center for Microelectronic Systems, Kyushu Institute of Technology() |
2nd Author's Name | Hiroaki Goto |
2nd Author's Affiliation | Center for Microelectronic Systems, Kyushu Institute of Technology |
3rd Author's Name | Hajime Fujiwara |
3rd Author's Affiliation | New Japan Radio Co. Ltd. |
4th Author's Name | Kazuyuki Nakamura |
4th Author's Affiliation | Center for Microelectronic Systems, Kyushu Institute of Technology |
Date | 2011-11-28 |
Paper # | VLD2011-65,DC2011-41 |
Volume (vol) | vol.111 |
Number (no) | 325 |
Page | pp.pp.- |
#Pages | 6 |
Date of Issue |