Title :
A 56mW CT Quadrature Cascaded ΣΔ Modulator with 77dB DR in a Near Zero-IF 20MHz Band
Author :
Breems, Lucien J. ; Rutten, Robert ; Van Veldhoven, Robert ; van der Weide, G. ; Termeer, Henk
Author_Institution :
NXP Semicond., Eindhoven
Abstract :
A 90nm CMOS CT quadrature ΣΔ modulator is designed for highly digitized wideband receivers. The ADC achieves 77dB DR and 20MHz BW around a 10.5MHz IF and is sampled at 340MHz. The cascaded modulator comprises programmable analog 2nd-order quadrature filters and a digital quadrature noise-cancellation filter. The 0.5mm2 chip draws 56mW from a 1.2V supply
Keywords :
CMOS digital integrated circuits; cascade networks; digital filters; radio receivers; sigma-delta modulation; 1.2 V; 10.5 MHz; 20 MHz; 340 MHz; 56 mW; 90 nm; CMOS delta-sigma modulator; CT quadrature cascaded delta-sigma modulator; cascaded modulator; digital quadrature noise-cancellation filter; highly digitized wideband receivers; programmable analog filter; second-order quadrature filters; Bandwidth; Calibration; Capacitors; Delay; Digital modulation; Noise cancellation; Quantization; Resistors; Resonator filters; Transfer functions;
Conference_Titel :
Solid-State Circuits Conference, 2007. ISSCC 2007. Digest of Technical Papers. IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
1-4244-0852-0
Electronic_ISBN :
0193-6530
DOI :
10.1109/ISSCC.2007.373382
