Title :
A 2.5 V 50 MHz IF-sampling ΔΣ-modulator for digital cellular telephones
Author :
Lansirinne, M. ; Lindfors, Saska ; Koli, Kimmo ; Halonen, Kari
Author_Institution :
Electron. Circuit Design Lab., Helsinki Univ. of Technol., Espoo, Finland
Abstract :
This paper discusses the design of a 50 MHz IF-sampling switched-capacitor ΔΣ-modulator with a 2.5 V supply voltage implemented in a 0.5 μm BiCMOS process. The problems caused by the low analog supply voltage are addressed with special biasing and common-mode arrangements. Simulation results verifying a peak SNDR of 83 dB for a baseband signal are presented
Keywords :
BiCMOS integrated circuits; cellular radio; digital radio; mixed analogue-digital integrated circuits; modulators; sigma-delta modulation; switched capacitor networks; 0.5 micron; 2.5 V; 50 MHz; 83 dB; BiCMOS process; IF-sampling ΔΣ-modulator; SC delta-sigma modulator; biasing; common-mode arrangements; digital cellular telephones; low analog supply voltage; switched-capacitor modulator; Active filters; Analog circuits; Baseband; Digital signal processing; Dynamic range; Frequency; Low voltage; Noise shaping; Quantization; Telephony;
Conference_Titel :
Analog and Mixed IC Design, 1997. Proceedings., 1997 2nd IEEE-CAS Region 8 Workshop on
Conference_Location :
Baveno
Print_ISBN :
0-7803-4240-2
DOI :
10.1109/AMICD.1997.637183
