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80-MHz bandpass ΔΣ modulators for multimode digital IF receivers.

Three fully differential bandpass (BP) ΔΣ modulators are presented. Two double-delay resonators are implemented using only one operational amplifier. The prototype circuits operate at a sampling frequency of 80 MHz. The BP ΔΣ modulators can be used in an intermediate-frequency (IF) receiver to combi...

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Podrobná bibliografie
Vydáno v:IEEE Journal of solid state circuits 38, 3 (2003).
Hlavní autor: Salo, T.O
Médium: Článek
Jazyk:angličtina
Témata:
0.35 micron.
1.25 MHz.
1.762 MHz.
24 to 38 mW.
270 kHz.
3.0 V.
3.84 MHz.
60 to 20 MHz.
80 MHz.
CMOS technology.
DECT.
GSM.
IS-95.
WCDMA/CDMA2000.
Analog-to-digital conversion.
Clock jitter.
Direct input signal sampling.
Double-delay resonators.
Eighth-order loop filter.
Frequency downconversion.
Intermediate-frequency receiver.
Multimode digital IF receivers.
Operational amplifier.
Peak signal-to-noise-plus-distortion ratios.
Sampled data circuits.
Sampling frequency.
Subsampling.
Switched-capacitor resonators.
Fully differential bandpass ΔΣ modulators.