Title :
A 2.5 V 50 MHz ΔΣ-modulator for digital cellular telephones
Author :
Lansirinne, Mika ; 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 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 are presented.
Keywords :
BiCMOS integrated circuits; cellular radio; digital radio; mixed analogue-digital integrated circuits; modulators; sigma-delta modulation; switched capacitor networks; telephone sets; 0.5 micron; 2.5 V; 50 MHz; 83 dB; BiCMOS process; SC ΔΣ-modulator; analog supply voltage; biasing arrangements; common-mode arrangements; delta-sigma modulator; digital cellular telephones; switched-capacitor ΔΣ-modulator; Analog circuits; Baseband; BiCMOS integrated circuits; Digital signal processing; Energy consumption; Frequency; Low voltage; Noise shaping; Quantization; Telephony;
Conference_Titel :
Circuits and Systems, 1997. Proceedings of the 40th Midwest Symposium on
Print_ISBN :
0-7803-3694-1
DOI :
10.1109/MWSCAS.1997.662285
