DocumentCode
3546739
Title
Digitally tuned bandpass sigma delta modulator for wireless communications
Author
Hezar, Rahmi ; Altun, Oguz
Author_Institution
Wireless Analog Technol. Center, Texas Instrum. Inc., Dallas, TX, USA
fYear
2005
fDate
23-26 May 2005
Firstpage
3668
Abstract
An 80 MHz, 3-level output, bandpass sigma delta modulator analog to digital converter (ADC) with complete digital tuning is presented. The proposed architecture is based on error feedback mechanism with a 64-level flash ADC, and a 3-level DAC in the loop. It yields almost constant SNR for programmable signal band that can be placed anywhere in the 2 to 38MHz band.
Keywords
band-pass filters; circuit feedback; circuit tuning; error analysis; programmable circuits; radio receivers; sigma-delta modulation; 2 to 38 MHz; 80 MHz; ADC architecture; analog to digital converter; constant SNR; digital tuning; digitally tuned bandpass sigma delta modulator; error feedback mechanism; flash ADC; programmable signal band; three-level DAC; wireless communications; Analog-digital conversion; Delta modulation; Delta-sigma modulation; Digital modulation; Feedback; Noise shaping; Switches; Transfer functions; Tunable circuits and devices; Wireless communication;
fLanguage
English
Publisher
ieee
Conference_Titel
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN
0-7803-8834-8
Type
conf
DOI
10.1109/ISCAS.2005.1465425
Filename
1465425
Link To Document