| Citation: |
Pan Wenguang, Ma Chengyan, Gan Yebing, Ye Tianchun. A reconfigurable OTA-C baseband filter with wide digital tuning for GNSS receivers[J]. Journal of Semiconductors, 2010, 31(9): 095006. doi: 10.1088/1674-4926/31/9/095006
Pan W G, Ma C Y, Gan Y B, Ye T C. A reconfigurable OTA-C baseband filter with wide digital tuning for GNSS receivers[J]. J. Semicond., 2010, 31(9): 095006. doi: 10.1088/1674-4926/31/9/095006.
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A reconfigurable OTA-C baseband filter with wide digital tuning for GNSS receivers
doi: 10.1088/1674-4926/31/9/095006
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Abstract
The design of a digitally-tunable sixth-order reconfigurable OTA-C filter in a 0.18-μm RFCMOS process is proposed. The filter can be configured as a complex band pass filter or two real low pass filters. An improved digital automatic frequency tuning scheme based on the voltage controlled oscillator technique is adopted to compensate for process variations. An extended tuning range (above 8 : 1) is obtained by using widely continuously tunable transconductors based on digital techniques. In the complex band pass mode, the bandwidth can be tuned from 3 to 24 MHz and the center frequency from 3 to 16 MHz.-
Keywords:
- reconfigurable filter
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