Title :
A 2nd Order 1-bit Complex Switched Capacitor Sigma-Delta ADC with 90dB SNDR in a 180kHz Bandwidth
Author :
Bannon, Alan ; Dunne, Anthony ; O´Hare, Daniel ; Miller, Matthew ; Oliaei, Omid
Author_Institution :
Freescale Semicond. Inc, Cork
Abstract :
A complex switched capacitor sigma-delta ADC is described. The ADC is used in the VLIF RX path of a GSM/GPRS/EDGE phone and has an SNDR of 90 dB in a 180 kHz bandwidth, with the VLIF centered at 123 kHz. The use of a complex noise transfer function allows for a more optimal use of noise shaping. The ADC is 2nd order, 1-bit, with a sampling rate of 52 MHz implemented in 90 nm CMOS.
Keywords :
CMOS digital integrated circuits; cellular radio; radiofrequency integrated circuits; sigma-delta modulation; switched capacitor networks; transceivers; CMOS ADC; GSM/GPRS/EDGE phone; bandwidth 180 kHz; complex noise transfer function; complex switched capacitor sigma-delta ADC; frequency 52 MHz; noise shaping; second-order sigma-delta modulator; size 90 nm; word length 1 bit; Bandwidth; Capacitors; Delta-sigma modulation; Frequency; GSM; Ground penetrating radar; Noise shaping; Semiconductor device noise; Signal design; Transfer functions;
Conference_Titel :
Electronics, Circuits and Systems, 2006. ICECS '06. 13th IEEE International Conference on
Conference_Location :
Nice
Print_ISBN :
1-4244-0395-2
Electronic_ISBN :
1-4244-0395-2
DOI :
10.1109/ICECS.2006.379738
