A 0.6 V, 2.11 MHz, 62 dB SFDR active-RC filter in 0.13 mu m CMOS process

Active-RC biquad is proposed, which allows the DC level of the input of operational amplifier (op-amp) to be different from that of the op-amp output, enabling the low-voltage operation. The proposed biquad realizes a second-order transfer function with only one op-amp, rendering even lower power co...

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Bibliographic Details
Published in:International journal of circuit theory and applications 2010-02, Vol.38 (1), p.99-107
Main Authors: Seok, Ji-Hwan, Jo, Jun-Gi, Yoo, Changsik
Format: Article
Language:English
Subjects:
Circuits
CMOS
Direct current
Dissipation
Dynamic range
Noise levels
Power consumption
Rendering
Online Access:Get full text
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Summary:Active-RC biquad is proposed, which allows the DC level of the input of operational amplifier (op-amp) to be different from that of the op-amp output, enabling the low-voltage operation. The proposed biquad realizes a second-order transfer function with only one op-amp, rendering even lower power consumption. By cascading two biquads, a 0.6 V fourth-order filter is realized in a 0.13 mu m CMOS technology. While dissipating only 0.42 mW, the filter shows 2.11 MHz cut-off frequency and 62 dB spurious-free dynamic range.
ISSN:0098-9886
DOI:10.1002/cta.526