Digitally programmable decibel-linear CMOS VGA for low-power mixed-signal applications
A new technique for realizing CMOS digitally-controlled decibel-linear variable gain amplifier (VGA) circuits is described. CMOS VGA circuits employing the proposed technique are then given. Besides being effective and simple to use from a system point of view, the VGA circuits offer a stable gain c...
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| Veröffentlicht in: | IEEE transactions on circuits and systems. 2, Analog and digital signal processing Analog and digital signal processing, 2000-05, Vol.47 (5), p.388-398 |
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| container_end_page | 398 |
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| container_issue | 5 |
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| container_title | IEEE transactions on circuits and systems. 2, Analog and digital signal processing |
| container_volume | 47 |
| creator | Elwan, H.O. Ismail, M. |
| description | A new technique for realizing CMOS digitally-controlled decibel-linear variable gain amplifier (VGA) circuits is described. CMOS VGA circuits employing the proposed technique are then given. Besides being effective and simple to use from a system point of view, the VGA circuits offer a stable gain characteristic with precise gain control that is achievable without component spreading. The VGA provides a 25 dB gain control range per stage, with 0.55 dB gain steps and a gain error of less than 0.5 dB. It can also be digitally reconfigured to give a 60 dB gain control range with 6 dB gain steps. The VGA circuit provides digital offset trimming, processes voltage or current input signals and operates in a fully differential configuration. Simulation and experimental results are provided. |
| doi_str_mv | 10.1109/82.842107 |
| format | Article |
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CMOS VGA circuits employing the proposed technique are then given. Besides being effective and simple to use from a system point of view, the VGA circuits offer a stable gain characteristic with precise gain control that is achievable without component spreading. The VGA provides a 25 dB gain control range per stage, with 0.55 dB gain steps and a gain error of less than 0.5 dB. It can also be digitally reconfigured to give a 60 dB gain control range with 6 dB gain steps. The VGA circuit provides digital offset trimming, processes voltage or current input signals and operates in a fully differential configuration. Simulation and experimental results are provided.</description><identifier>ISSN: 1057-7130</identifier><identifier>ISSN: 1558-125X</identifier><identifier>EISSN: 1558-125X</identifier><identifier>DOI: 10.1109/82.842107</identifier><identifier>CODEN: ICSPE5</identifier><language>eng</language><publisher>New York: IEEE</publisher><subject>CMOS digital integrated circuits ; CMOS technology ; converter ; current division network ; current sensed op amp ; decibel-linear ; Digital control ; Digital signal processing chips ; Dynamic range ; Feedback loop ; Filters ; Gain control ; Signal processing ; variable gain amplifier ; Voltage</subject><ispartof>IEEE transactions on circuits and systems. 2, Analog and digital signal processing, 2000-05, Vol.47 (5), p.388-398</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. 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Simulation and experimental results are provided.</description><subject>CMOS digital integrated circuits</subject><subject>CMOS technology</subject><subject>converter</subject><subject>current division network</subject><subject>current sensed op amp</subject><subject>decibel-linear</subject><subject>Digital control</subject><subject>Digital signal processing chips</subject><subject>Dynamic range</subject><subject>Feedback loop</subject><subject>Filters</subject><subject>Gain control</subject><subject>Signal processing</subject><subject>variable gain amplifier</subject><subject>Voltage</subject><issn>1057-7130</issn><issn>1558-125X</issn><issn>1558-125X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2000</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNpd0U1Lw0AQBuBFFKzVg1dPwYMgmLofSXZzLK1WodKDWrwtm2RSt266cTeh9t-bkuLB0wzMwwwvg9AlwSNCcHov6EhElGB-hAYkjkVIaPxx3PU45iEnDJ-iM-_XGGNBUjFAy6le6UYZswtqZ1dOVZXKDAQF5DoDExq9AeWCycviNVjOxkFpXWDsNqztFlxQ6R8oQq9XG2UCVddG56rRduPP0UmpjIeLQx2i98eHt8lTOF_MnifjeZiziDRhkZQJS0osGGMkKiClmEdZSokoAae8yLjKhGK4pAQIFCIRXKSqTLhKMReRYEN01-_1W6jbTNZOV8rtpFVaTvVyLK1bya_mU5KUd-mH6KbnXdbvFnwjK-1zMEZtwLZeUk5jyiLcwet_cG1b16X0UnR3ORd0j257lDvrvYPy7zzBcv8NKajsv9HZq95qAPhzh-EvNw-Dkg</recordid><startdate>20000501</startdate><enddate>20000501</enddate><creator>Elwan, H.O.</creator><creator>Ismail, M.</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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CMOS VGA circuits employing the proposed technique are then given. Besides being effective and simple to use from a system point of view, the VGA circuits offer a stable gain characteristic with precise gain control that is achievable without component spreading. The VGA provides a 25 dB gain control range per stage, with 0.55 dB gain steps and a gain error of less than 0.5 dB. It can also be digitally reconfigured to give a 60 dB gain control range with 6 dB gain steps. The VGA circuit provides digital offset trimming, processes voltage or current input signals and operates in a fully differential configuration. Simulation and experimental results are provided.</abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/82.842107</doi><tpages>11</tpages></addata></record> |
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| ispartof | IEEE transactions on circuits and systems. 2, Analog and digital signal processing, 2000-05, Vol.47 (5), p.388-398 |
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| source | IEEE Electronic Library (IEL) |
| subjects | CMOS digital integrated circuits CMOS technology converter current division network current sensed op amp decibel-linear Digital control Digital signal processing chips Dynamic range Feedback loop Filters Gain control Signal processing variable gain amplifier Voltage |
| title | Digitally programmable decibel-linear CMOS VGA for low-power mixed-signal applications |
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