Switched-Capacitor Track-and-Hold Amplifiers With Low Sensitivity to Op-Amp Imperfections
This paper describes high-precision switched-capacitor (SC) track-and-hold amplifier (THA) stages. They use a novel continuous-time correlated double sampling (CDS) scheme to desensitize the operation to amplifier imperfections. Unlike earlier predictive-CDS amplifiers, the circuits do not need a sa...
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| Veröffentlicht in: | IEEE transactions on circuits and systems. 1, Fundamental theory and applications Fundamental theory and applications, 2007-01, Vol.54 (1), p.193-199 |
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| container_title | IEEE transactions on circuits and systems. 1, Fundamental theory and applications |
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| creator | Yoshizawa, H. Temes, G.C. |
| description | This paper describes high-precision switched-capacitor (SC) track-and-hold amplifier (THA) stages. They use a novel continuous-time correlated double sampling (CDS) scheme to desensitize the operation to amplifier imperfections. Unlike earlier predictive-CDS amplifiers, the circuits do not need a sampled-and-held input signal for their operation. During the tracking period, an auxiliary continuous-time signal path is established, which predicts the output voltage during the holding period. This allows accurate operation even for low amplifier gains and large offsets over a wide input frequency range. Extensive simulations were performed to compare the performance of the proposed THAs with earlier circuits utilizing CDS. The results verify that their operation is far more robust than that of any previously described SC amplifiers |
| doi_str_mv | 10.1109/TCSI.2006.887454 |
| format | Article |
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The results verify that their operation is far more robust than that of any previously described SC amplifiers</description><subject>Amplifiers</subject><subject>Analog signal processing</subject><subject>Circuit noise</subject><subject>Circuit simulation</subject><subject>Circuits</subject><subject>Clocks</subject><subject>Communication switching</subject><subject>Defects</subject><subject>Frequency</subject><subject>Frequency ranges</subject><subject>Gain</subject><subject>Operational amplifiers</subject><subject>Robustness</subject><subject>Sampling</subject><subject>Sampling methods</subject><subject>Signal processing</subject><subject>switched-capacitor (SC) amplifier</subject><subject>track-and-hold (T/H) stage</subject><subject>Tracking</subject><subject>Voltage</subject><issn>1549-8328</issn><issn>1057-7122</issn><issn>1558-0806</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2007</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNp9kUFr3DAQhUVpoemm90Ivpof2pM3IsmzpGJa0WVjIYbeEnIQsj4hSr-VK2ob8-8ps6aGHnmYYvjfDvEfIBwZrxkBdHTb77boGaNdSdo1oXpELJoSkIKF9vfSNopLX8i15l9ITQK2AswvysH_22T7iQDdmNtbnEKtDNPYHNdNAb8M4VNfHefTOY0zVvc-P1S48V3ucks_-l88vVQ7V3UwLVW2PM0aHNvswpUvyxpkx4fs_dUW-f705bG7p7u7bdnO9o5YLnim2LcOht-CwBw6Dcd0gGIJzzHYDGsdqVJ1STvRgTCPqXpWZrHuupJTA-Yp8Oe-dY_h5wpT10SeL42gmDKekpWrr4ktBV-Tzf0neCN61QhXw0z_gUzjFqXyhZduo4ihb7sIZsjGkFNHpOfqjiS-agV4i0UskeolEnyMpko9niUfEv3hT1gFv-G98oIeq</recordid><startdate>200701</startdate><enddate>200701</enddate><creator>Yoshizawa, H.</creator><creator>Temes, G.C.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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They use a novel continuous-time correlated double sampling (CDS) scheme to desensitize the operation to amplifier imperfections. Unlike earlier predictive-CDS amplifiers, the circuits do not need a sampled-and-held input signal for their operation. During the tracking period, an auxiliary continuous-time signal path is established, which predicts the output voltage during the holding period. This allows accurate operation even for low amplifier gains and large offsets over a wide input frequency range. Extensive simulations were performed to compare the performance of the proposed THAs with earlier circuits utilizing CDS. The results verify that their operation is far more robust than that of any previously described SC amplifiers</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TCSI.2006.887454</doi><tpages>7</tpages></addata></record> |
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| identifier | ISSN: 1549-8328 |
| ispartof | IEEE transactions on circuits and systems. 1, Fundamental theory and applications, 2007-01, Vol.54 (1), p.193-199 |
| issn | 1549-8328 1057-7122 1558-0806 |
| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Amplifiers Analog signal processing Circuit noise Circuit simulation Circuits Clocks Communication switching Defects Frequency Frequency ranges Gain Operational amplifiers Robustness Sampling Sampling methods Signal processing switched-capacitor (SC) amplifier track-and-hold (T/H) stage Tracking Voltage |
| title | Switched-Capacitor Track-and-Hold Amplifiers With Low Sensitivity to Op-Amp Imperfections |
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