Highly linear tunable CMOS Gm-C low-pass filter
A comprehensive analysis of tunable transconductor topologies based on passive resistors is presented. Based on this analysis, a new CMOS transconductor is designed, which features high linearity, simplicity, and robustness against geometric and parametric mismatches. A novel tuning technique using...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2009 |
| País: | México |
| Institución: | Instituto Nacional de Astrofísica, Óptica y Electrónica |
| Repositorio: | Repositorio Institucional del INAOE |
| Idioma: | inglés |
| OAI Identifier: | oai:inaoe.repositorioinstitucional.mx:1009/1241 |
| Acceso en línea: | http://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1241 |
| Access Level: | acceso abierto |
| Palabra clave: | info:eu-repo/classification/Analog CMOS circuits/Analog CMOS circuits info:eu-repo/classification/Continuous-time filters/Continuous-time filters info:eu-repo/classification/Gm-C filters/Gm-C filters info:eu-repo/classification/Harmonic distortion/Harmonic distortion info:eu-repo/classification/Transconductors/Transconductors info:eu-repo/classification/Tunable filters/Tunable filters info:eu-repo/classification/cti/1 info:eu-repo/classification/cti/22 info:eu-repo/classification/cti/2203 |
| Sumario: | A comprehensive analysis of tunable transconductor topologies based on passive resistors is presented. Based on this analysis, a new CMOS transconductor is designed, which features high linearity, simplicity, and robustness against geometric and parametric mismatches. A novel tuning technique using just a MOS transistor in the triode region allows the adjustment of the transconductance in a wide range without affecting the voltage-to-current conversion core. Measurement results of the transconductor fabricated in a 0.5- µm CMOS technology confirm the high linearity predicted. As an application, a third-order Gm-C tunable low-pass filter fabricated in the same technology is presented. The measured third-order intermodulation distortion of the filter for a single 5-V supply and a 2-Vpp two-tone input signal centered at 10 MHz is -78 dB. |
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