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Discrete-time charge-domain filter with charge buffer for flexible design of FIR filter

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1 Author(s)
Huang, M.-F. ; Inf. & Commun. Res. Lab., Ind. Technol. Res. Inst., Hsinchu, Taiwan

A discrete-time charge-domain filter (CDF) with wide bandwidth and high attenuation is proposed. By employing a charge buffer with timing control to move a sampled charge between capacitors, the CDF can reduce the number of pulses and select a decimation rate effectively. Measurement showed 13 MHz bandwidth and 88.86 dB attenuation in a 90 nm CMOS process.

Published in:

Electronics Letters  (Volume:47 ,  Issue: 24 )