A Time-Based Bandpass ADC Using Time-Interleaved Voltage-Controlled Oscillators

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In this paper, a bandpass analog-to-digital converter (ADC) based on time-inverleaved oversampled ADC is introduced. Unlike previous delta-sigma bandpass ADCs that require accurate digital-to-analog converters and high-speed analog circuits, the proposed architecture provides bandpass function by time-interleaving first-order voltage-controlled-oscillator (VCO)-based ADCs. The use of VCO-based ADC has the advantage that its resolution is determined by the time resolution rather than the voltage resolution, thus making it attractive for future low-voltage CMOS processes. The performance of the proposed ADC is theoretically analyzed and simulated in ideal condition, as well as in nonideal condition, in the presence of nonlinearity, sampling clock jitter, and mismatch.
Publisher
IEEE
Issue Date
2008-12
Language
English
Article Type
Article
Citation

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS, v.55, pp.3571 - 3581

ISSN
1549-8328
DOI
10.1109/TCSI.2008.925823
URI
http://hdl.handle.net/10203/90938
Appears in Collection
EE-Journal Papers(저널논문)
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