A Fully Differential RC Calibrator for Accurate Cut-off Frequency of a Programmable Channel Selection Filter
A fully differential RC calibrator for accurate cut-off frequency of a programmable channel selection filter is proposed. The proposed RC calibrator consists of an RC timer, clock generator, synchronous counter, digital comparator, and control block. To verify the proposed RC calibrator, a six-order...
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Veröffentlicht in: | Journal of semiconductor technology and science 2016, Vol.16 (5), p.682-686 |
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Hauptverfasser: | , , , |
Format: | Artikel |
Sprache: | kor |
Online-Zugang: | Volltext |
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Zusammenfassung: | A fully differential RC calibrator for accurate cut-off frequency of a programmable channel selection filter is proposed. The proposed RC calibrator consists of an RC timer, clock generator, synchronous counter, digital comparator, and control block. To verify the proposed RC calibrator, a six-order Chebyshev programmable low-pass filter with adjustable 3 dB cut-off frequency, which is controlled by the proposed RC calibrator, was implemented in a $0.18-{\mu}m$ CMOS technology. The channel selection filter with the proposed RC calibrator draws 1.8 mA from a 1.8 V supply voltage and the measured 3 dB cut-off frequencies of the channel selection LPF is controlled accurately by the RC calibrator. |
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ISSN: | 1598-1657 |