Converting a Three-Stage Pseudoclass-AB Amplifier to a True-Class-AB Amplifier
We convert a low-voltage low-transistor-count wide-swing multistage pseudoclass-AB amplifier proposed by Mita et al. to a true-class-AB amplifier. The conversion is made possible using gate-drain feedback to combine two inverting common- source amplifiers to form a single noninverting stage. Both th...
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| creator | Surkanti, P. R. Furth, P. M. |
| description | We convert a low-voltage low-transistor-count wide-swing multistage pseudoclass-AB amplifier proposed by Mita et al. to a true-class-AB amplifier. The conversion is made possible using gate-drain feedback to combine two inverting common- source amplifiers to form a single noninverting stage. Both the pseudoclassand true-class-AB amplifiers were fabricated in a 0.5-μm CMOS 2P3M process. They are designed to operate from ±1.25-V supplies at a nominal quiescent current of 175 μA and a minimum phase margin of 45° when driving capacitive loads from 1 to 200 pF and resistive loads from 500 Ω to 1 MΩ. The total com- pensation capacitance of the proposed class-AB amplifier is 12 pF, which is 50% less than the pseudoclass-AB amplifier. The simu- lated unity-gain frequency of the class-AB amplifier is 4.9 MHz at a load of 25 pF||1kΩ, which is 88% higher than that of the pseudoclass-AB amplifier. Experimental measurements show that the proposed amplifier has a maximum total bias current of 175 μA, as compared with 1.05 mA for the pseudoclass-AB am- plifier. Measured slew rates of the proposed amplifier are 2.7 and 3.3 V/μs, twice as much as those of its pseudoclass-AB counterpart. |
| doi_str_mv | 10.1109/TCSII.2012.2188462 |
| format | Article |
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R. ; Furth, P. M.</creator><creatorcontrib>Surkanti, P. R. ; Furth, P. M.</creatorcontrib><description>We convert a low-voltage low-transistor-count wide-swing multistage pseudoclass-AB amplifier proposed by Mita et al. to a true-class-AB amplifier. The conversion is made possible using gate-drain feedback to combine two inverting common- source amplifiers to form a single noninverting stage. Both the pseudoclassand true-class-AB amplifiers were fabricated in a 0.5-μm CMOS 2P3M process. They are designed to operate from ±1.25-V supplies at a nominal quiescent current of 175 μA and a minimum phase margin of 45° when driving capacitive loads from 1 to 200 pF and resistive loads from 500 Ω to 1 MΩ. The total com- pensation capacitance of the proposed class-AB amplifier is 12 pF, which is 50% less than the pseudoclass-AB amplifier. The simu- lated unity-gain frequency of the class-AB amplifier is 4.9 MHz at a load of 25 pF||1kΩ, which is 88% higher than that of the pseudoclass-AB amplifier. Experimental measurements show that the proposed amplifier has a maximum total bias current of 175 μA, as compared with 1.05 mA for the pseudoclass-AB am- plifier. Measured slew rates of the proposed amplifier are 2.7 and 3.3 V/μs, twice as much as those of its pseudoclass-AB counterpart.</description><identifier>ISSN: 1549-7747</identifier><identifier>EISSN: 1558-3791</identifier><identifier>DOI: 10.1109/TCSII.2012.2188462</identifier><identifier>CODEN: ICSPE5</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Amplification ; Amplifiers ; Capacitance ; Circuits ; Class-AB amplifier ; CMOS ; CMOS integrated circuits ; Conversion ; Converting ; Current measurement ; gate-drain feedback ; Logic gates ; Multistage ; Poles and zeros ; pseudoclass-AB amplifier ; Resistors ; reverse nested Miller compensation (RNMC) ; Slew rate ; Transistors</subject><ispartof>IEEE transactions on circuits and systems. II, Express briefs, 2012-04, Vol.59 (4), p.229-233</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) Apr 2012</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c328t-6b58486308609cefcbcba74ed7ed0753228c8d9ef1bfee49bf87e6c2e0da87cc3</citedby><cites>FETCH-LOGICAL-c328t-6b58486308609cefcbcba74ed7ed0753228c8d9ef1bfee49bf87e6c2e0da87cc3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/6170880$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,780,784,796,27924,27925,54758</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/6170880$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Surkanti, P. R.</creatorcontrib><creatorcontrib>Furth, P. M.</creatorcontrib><title>Converting a Three-Stage Pseudoclass-AB Amplifier to a True-Class-AB Amplifier</title><title>IEEE transactions on circuits and systems. II, Express briefs</title><addtitle>TCSII</addtitle><description>We convert a low-voltage low-transistor-count wide-swing multistage pseudoclass-AB amplifier proposed by Mita et al. to a true-class-AB amplifier. The conversion is made possible using gate-drain feedback to combine two inverting common- source amplifiers to form a single noninverting stage. Both the pseudoclassand true-class-AB amplifiers were fabricated in a 0.5-μm CMOS 2P3M process. They are designed to operate from ±1.25-V supplies at a nominal quiescent current of 175 μA and a minimum phase margin of 45° when driving capacitive loads from 1 to 200 pF and resistive loads from 500 Ω to 1 MΩ. The total com- pensation capacitance of the proposed class-AB amplifier is 12 pF, which is 50% less than the pseudoclass-AB amplifier. The simu- lated unity-gain frequency of the class-AB amplifier is 4.9 MHz at a load of 25 pF||1kΩ, which is 88% higher than that of the pseudoclass-AB amplifier. Experimental measurements show that the proposed amplifier has a maximum total bias current of 175 μA, as compared with 1.05 mA for the pseudoclass-AB am- plifier. Measured slew rates of the proposed amplifier are 2.7 and 3.3 V/μs, twice as much as those of its pseudoclass-AB counterpart.</description><subject>Amplification</subject><subject>Amplifiers</subject><subject>Capacitance</subject><subject>Circuits</subject><subject>Class-AB amplifier</subject><subject>CMOS</subject><subject>CMOS integrated circuits</subject><subject>Conversion</subject><subject>Converting</subject><subject>Current measurement</subject><subject>gate-drain feedback</subject><subject>Logic gates</subject><subject>Multistage</subject><subject>Poles and zeros</subject><subject>pseudoclass-AB amplifier</subject><subject>Resistors</subject><subject>reverse nested Miller compensation (RNMC)</subject><subject>Slew rate</subject><subject>Transistors</subject><issn>1549-7747</issn><issn>1558-3791</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNplkMtOwzAQRS0EEqXwA7CJxIaNg-08bC9LxKNSBUgt68hxxiVVGhc7QeLvcWjFAlYz0pw7mjkIXVISU0rk7apYzucxI5TFjAqR5uwITWiWCZxwSY_HPpWY85SfojPvN4QwSRI2Qc-F7T7B9U23jlS0encAeNmrNUSvHoba6lZ5j2d30Wy7axvTgIt6O5JuAFz8G56jE6NaDxeHOkVvD_er4gkvXh7nxWyBdcJEj_MqE6nIEyJyIjUYXelK8RRqDjXhWcKY0KKWYGhlAFJZGcEh1wxIrQTXOpmim_3enbMfA_i-3DZeQ9uqDuzgS0pYeJBlQgb0-g-6sYPrwnWBCkiaZYQFiu0p7az3Dky5c81Wua8AlaPi8kdxOSouD4pD6GofagDgN5BTToQgyTeeSXbL</recordid><startdate>20120401</startdate><enddate>20120401</enddate><creator>Surkanti, P. R.</creator><creator>Furth, P. M.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>97E</scope><scope>RIA</scope><scope>RIE</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope><scope>F28</scope><scope>FR3</scope></search><sort><creationdate>20120401</creationdate><title>Converting a Three-Stage Pseudoclass-AB Amplifier to a True-Class-AB Amplifier</title><author>Surkanti, P. R. ; Furth, P. 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M.</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 2005–Present</collection><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><jtitle>IEEE transactions on circuits and systems. II, Express briefs</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Surkanti, P. R.</au><au>Furth, P. M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Converting a Three-Stage Pseudoclass-AB Amplifier to a True-Class-AB Amplifier</atitle><jtitle>IEEE transactions on circuits and systems. II, Express briefs</jtitle><stitle>TCSII</stitle><date>2012-04-01</date><risdate>2012</risdate><volume>59</volume><issue>4</issue><spage>229</spage><epage>233</epage><pages>229-233</pages><issn>1549-7747</issn><eissn>1558-3791</eissn><coden>ICSPE5</coden><abstract>We convert a low-voltage low-transistor-count wide-swing multistage pseudoclass-AB amplifier proposed by Mita et al. to a true-class-AB amplifier. The conversion is made possible using gate-drain feedback to combine two inverting common- source amplifiers to form a single noninverting stage. Both the pseudoclassand true-class-AB amplifiers were fabricated in a 0.5-μm CMOS 2P3M process. They are designed to operate from ±1.25-V supplies at a nominal quiescent current of 175 μA and a minimum phase margin of 45° when driving capacitive loads from 1 to 200 pF and resistive loads from 500 Ω to 1 MΩ. The total com- pensation capacitance of the proposed class-AB amplifier is 12 pF, which is 50% less than the pseudoclass-AB amplifier. The simu- lated unity-gain frequency of the class-AB amplifier is 4.9 MHz at a load of 25 pF||1kΩ, which is 88% higher than that of the pseudoclass-AB amplifier. Experimental measurements show that the proposed amplifier has a maximum total bias current of 175 μA, as compared with 1.05 mA for the pseudoclass-AB am- plifier. Measured slew rates of the proposed amplifier are 2.7 and 3.3 V/μs, twice as much as those of its pseudoclass-AB counterpart.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TCSII.2012.2188462</doi><tpages>5</tpages></addata></record> |
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| subjects | Amplification Amplifiers Capacitance Circuits Class-AB amplifier CMOS CMOS integrated circuits Conversion Converting Current measurement gate-drain feedback Logic gates Multistage Poles and zeros pseudoclass-AB amplifier Resistors reverse nested Miller compensation (RNMC) Slew rate Transistors |
| title | Converting a Three-Stage Pseudoclass-AB Amplifier to a True-Class-AB Amplifier |
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