A DC-to-1 GHz Tunable RF \Delta \Sigma ADC Achieving DR = 74 dB and BW = 150 MHz at f = 450 MHz Using 550 mW

A DC-to-1 GHz Tunable RF \Delta \Sigma ADC Achieving DR = 74 dB and BW = 150 MHz at f = 450 MHz Using 550 mW

A sixth-order dc-to-1 GHz tunable continuous-time lowpass/bandpass ΔΣ ADC in 65-nm CMOS targeting RF and IF digitizing applications is presented. The ADC achieves 150-MHz bandwidth at 450-MHz center frequency with 74-dB dynamic range at 4-GHz sampling frequency while consuming 550 mW. This performan...

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Veröffentlicht in:IEEE journal of solid-state circuits 2012-12, Vol.47 (12), p.2888-2897
Hauptverfasser: Shibata, H., Schreier, R., Wenhua Yang, Shaikh, A., Paterson, D., Caldwell, T. C., Alldred, D., Ping Wing Lai
Format: Artikel
Sprache:eng
Schlagworte:
Bandpass ADC
Bandwidth
continuous-time
delta-sigma ADC
feed-forward operational amplifier
Gain
IF sampling
MOS devices
Noise measurement
Power demand
Resistors
Resonant frequency
RF sampling
software radio
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Zusammenfassung:A sixth-order dc-to-1 GHz tunable continuous-time lowpass/bandpass ΔΣ ADC in 65-nm CMOS targeting RF and IF digitizing applications is presented. The ADC achieves 150-MHz bandwidth at 450-MHz center frequency with 74-dB dynamic range at 4-GHz sampling frequency while consuming 550 mW. This performance is enabled by a reconfigurable LC and active-RC modulator structure, fifth-order and seventh-order feedforward operational amplifiers, a self-cut-off comparator, and a dual-supply DAC.
ISSN:0018-9200
1558-173X
DOI:10.1109/JSSC.2012.2217860