Title :
A two-path bandpass /spl Sigma//spl Delta/ modulator with extended noise shaping
Author :
Tabatabaei, A. ; Kaviani, K. ; Wooley, B.
Author_Institution :
Center for Integrated Syst., Stanford Univ., CA, USA
Abstract :
The proliferation of communications applications stimulates interest in digitizing bandpass signals with bandwidths of several MHz at intermediate frequencies above 10 MHz. This multistage oversampling modulator combines lowpass and bandpass stages to achieve an extended dynamic range at low oversampling ratios. An experimental prototype of the architecture integrated in 0.25 /spl mu/m CMOS achieves 75 dB dynamic range for 2 MHz signal bandwidth at 16 MHz IF.
Keywords :
CMOS integrated circuits; cascade networks; sigma-delta modulation; 0.25 micron; 16 MHz; 2 MHz; CMOS; bandpass signals; extended dynamic range; extended noise shaping; intermediate frequencies; lowpass stages; oversampling ratios; signal bandwidth; two-path bandpass sigma-delta modulator; Bandwidth; Delta modulation; Digital modulation; Dynamic range; Frequency; Noise cancellation; Noise figure; Noise shaping; Prototypes; Quantization;
Conference_Titel :
Solid-State Circuits Conference, 2000. Digest of Technical Papers. ISSCC. 2000 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-5853-8
DOI :
10.1109/ISSCC.2000.839808
