A 1-V CMOS switched-opamp switched-capacitor pseudo-2-path filter
A modified switched-opamp technique is proposed to enable switched-capacitor (SC) circuits to operate at 1 V with the opamp fully functional in all phases. A 1-V fully differential two-switchable-output-pair operational amplifier has been designed for the proposed technique, which is then employed i...
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| Veröffentlicht in: | IEEE journal of solid-state circuits 2001-01, Vol.36 (1), p.14-22 |
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| container_title | IEEE journal of solid-state circuits |
| container_volume | 36 |
| creator | Cheung, V.S.-L. Luong, H.C. Wing-Hung Ki |
| description | A modified switched-opamp technique is proposed to enable switched-capacitor (SC) circuits to operate at 1 V with the opamp fully functional in all phases. A 1-V fully differential two-switchable-output-pair operational amplifier has been designed for the proposed technique, which is then employed in a 1-V fully differential SC pseudo-2-path filter. Implemented in a standard single-poly triple-metal 0.5-/spl mu/m CMOS process, the filter achieves a sixth-order bandpass response centered at 75 kHz with a quality factor of 45. Capacitors formed with polysilicon and highly doped n-well (cap-well option) regions are used to achieve both good linearity and small chip area. At 1-V supply, the filter obtains an output swing of 1.2 V/sub pp/ and a dynamic range of 51 db while dissipating 310 /spl mu/W and occupying a chip area of 0.8 mm/sup 2/. |
| doi_str_mv | 10.1109/4.896224 |
| format | Article |
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A 1-V fully differential two-switchable-output-pair operational amplifier has been designed for the proposed technique, which is then employed in a 1-V fully differential SC pseudo-2-path filter. Implemented in a standard single-poly triple-metal 0.5-/spl mu/m CMOS process, the filter achieves a sixth-order bandpass response centered at 75 kHz with a quality factor of 45. Capacitors formed with polysilicon and highly doped n-well (cap-well option) regions are used to achieve both good linearity and small chip area. At 1-V supply, the filter obtains an output swing of 1.2 V/sub pp/ and a dynamic range of 51 db while dissipating 310 /spl mu/W and occupying a chip area of 0.8 mm/sup 2/.</description><identifier>ISSN: 0018-9200</identifier><identifier>EISSN: 1558-173X</identifier><identifier>DOI: 10.1109/4.896224</identifier><identifier>CODEN: IJSCBC</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>Band pass filters ; Chip formation ; Chips ; Circuits ; Clocks ; CMOS ; CMOS process ; CMOS technology ; Differential amplifiers ; Dynamic voltage scaling ; Low voltage ; Noise levels ; Operational amplifiers ; Phases ; Power semiconductor switches ; Quality factor ; Switching circuits</subject><ispartof>IEEE journal of solid-state circuits, 2001-01, Vol.36 (1), p.14-22</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2001</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c365t-e9e5d012f5a413e26b0ec963e726c454e41e2d3fe66f0266a838f0876f75e1943</citedby><cites>FETCH-LOGICAL-c365t-e9e5d012f5a413e26b0ec963e726c454e41e2d3fe66f0266a838f0876f75e1943</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/896224$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>314,776,780,792,27901,27902,54733</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/896224$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc></links><search><creatorcontrib>Cheung, V.S.-L.</creatorcontrib><creatorcontrib>Luong, H.C.</creatorcontrib><creatorcontrib>Wing-Hung Ki</creatorcontrib><title>A 1-V CMOS switched-opamp switched-capacitor pseudo-2-path filter</title><title>IEEE journal of solid-state circuits</title><addtitle>JSSC</addtitle><description>A modified switched-opamp technique is proposed to enable switched-capacitor (SC) circuits to operate at 1 V with the opamp fully functional in all phases. A 1-V fully differential two-switchable-output-pair operational amplifier has been designed for the proposed technique, which is then employed in a 1-V fully differential SC pseudo-2-path filter. Implemented in a standard single-poly triple-metal 0.5-/spl mu/m CMOS process, the filter achieves a sixth-order bandpass response centered at 75 kHz with a quality factor of 45. Capacitors formed with polysilicon and highly doped n-well (cap-well option) regions are used to achieve both good linearity and small chip area. At 1-V supply, the filter obtains an output swing of 1.2 V/sub pp/ and a dynamic range of 51 db while dissipating 310 /spl mu/W and occupying a chip area of 0.8 mm/sup 2/.</description><subject>Band pass filters</subject><subject>Chip formation</subject><subject>Chips</subject><subject>Circuits</subject><subject>Clocks</subject><subject>CMOS</subject><subject>CMOS process</subject><subject>CMOS technology</subject><subject>Differential amplifiers</subject><subject>Dynamic voltage scaling</subject><subject>Low voltage</subject><subject>Noise levels</subject><subject>Operational amplifiers</subject><subject>Phases</subject><subject>Power semiconductor switches</subject><subject>Quality factor</subject><subject>Switching circuits</subject><issn>0018-9200</issn><issn>1558-173X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNqF0UtLw0AQB_BFFKxV8OwpeFAvW_c52RxL8QVKDz7wtqybCU1Jm7ibIH57U1IUPOhpGObHwMyfkGPOJpyz7FJNTAZCqB0y4lobylP5uktGjHFDM8HYPjmIcdm3Shk-ItNpwulLMnuYPybxo2z9AnNaN27V_LTeNc6XbR2SJmKX11TQxrWLpCirFsMh2StcFfFoW8fk-frqaXZL7-c3d7PpPfUSdEsxQ50zLgrtFJco4I2hz0BiKsArrVBxFLksEKBgAsAZaQpmUihSjTxTckzOh71NqN87jK1dldFjVbk11l20GVcAIMH08uxPKQxXgkn2P-z3aTAbePoLLusurPtzbdZ_W4Ng0KOLAflQxxiwsE0oVy58Ws7sJhur7JBNT08GWiLiN9sOvwCXPYV5</recordid><startdate>200101</startdate><enddate>200101</enddate><creator>Cheung, V.S.-L.</creator><creator>Luong, H.C.</creator><creator>Wing-Hung Ki</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>RIA</scope><scope>RIE</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>8FD</scope><scope>L7M</scope><scope>7U5</scope><scope>F28</scope><scope>FR3</scope></search><sort><creationdate>200101</creationdate><title>A 1-V CMOS switched-opamp switched-capacitor pseudo-2-path filter</title><author>Cheung, V.S.-L. ; Luong, H.C. ; Wing-Hung Ki</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c365t-e9e5d012f5a413e26b0ec963e726c454e41e2d3fe66f0266a838f0876f75e1943</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2001</creationdate><topic>Band pass filters</topic><topic>Chip formation</topic><topic>Chips</topic><topic>Circuits</topic><topic>Clocks</topic><topic>CMOS</topic><topic>CMOS process</topic><topic>CMOS technology</topic><topic>Differential amplifiers</topic><topic>Dynamic voltage scaling</topic><topic>Low voltage</topic><topic>Noise levels</topic><topic>Operational amplifiers</topic><topic>Phases</topic><topic>Power semiconductor switches</topic><topic>Quality factor</topic><topic>Switching circuits</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Cheung, V.S.-L.</creatorcontrib><creatorcontrib>Luong, H.C.</creatorcontrib><creatorcontrib>Wing-Hung Ki</creatorcontrib><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>Solid State and Superconductivity Abstracts</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><jtitle>IEEE journal of solid-state circuits</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Cheung, V.S.-L.</au><au>Luong, H.C.</au><au>Wing-Hung Ki</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A 1-V CMOS switched-opamp switched-capacitor pseudo-2-path filter</atitle><jtitle>IEEE journal of solid-state circuits</jtitle><stitle>JSSC</stitle><date>2001-01</date><risdate>2001</risdate><volume>36</volume><issue>1</issue><spage>14</spage><epage>22</epage><pages>14-22</pages><issn>0018-9200</issn><eissn>1558-173X</eissn><coden>IJSCBC</coden><abstract>A modified switched-opamp technique is proposed to enable switched-capacitor (SC) circuits to operate at 1 V with the opamp fully functional in all phases. A 1-V fully differential two-switchable-output-pair operational amplifier has been designed for the proposed technique, which is then employed in a 1-V fully differential SC pseudo-2-path filter. Implemented in a standard single-poly triple-metal 0.5-/spl mu/m CMOS process, the filter achieves a sixth-order bandpass response centered at 75 kHz with a quality factor of 45. Capacitors formed with polysilicon and highly doped n-well (cap-well option) regions are used to achieve both good linearity and small chip area. At 1-V supply, the filter obtains an output swing of 1.2 V/sub pp/ and a dynamic range of 51 db while dissipating 310 /spl mu/W and occupying a chip area of 0.8 mm/sup 2/.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/4.896224</doi><tpages>9</tpages></addata></record> |
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| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Band pass filters Chip formation Chips Circuits Clocks CMOS CMOS process CMOS technology Differential amplifiers Dynamic voltage scaling Low voltage Noise levels Operational amplifiers Phases Power semiconductor switches Quality factor Switching circuits |
| title | A 1-V CMOS switched-opamp switched-capacitor pseudo-2-path filter |
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