A 0.8 V switched-opamp bandpass ΔΣ modulator using a two-path architecture
Journal
2002 IEEE Asia-Pacific Conference on ASIC, AP-ASIC 2002 - Proceedings
Pages
1-4
Date Issued
2002-08
Author(s)
Abstract
In this paper, a very low-voltage fourth-order bandpass delta-sigma modulator with a two-path architecture is presented. Using the modified switched opamp technique enables the modulator to operate at only 0.8 V supply voltage without any voltage multiplier or bootstrapping switch. Realized in a 0.25 μm 1P5M standard CMOS process, the prototype modulator exhibits a signal-to-noise-plus-distortion ratio (SNDR) of 60.6 db and a dynamic range (DR) of 68 db in a 30 kHz signal bandwidth centered at 1.25 MHz while consuming 2.5 mW and occupying an active area of 2.11 mm2. © 2002 IEEE.
Other Subjects
Bandpass amplifiers; Bandpass filters; CMOS integrated circuits; Delta sigma modulation; Operational amplifiers; Signal to noise ratio; Bandpass delta sigma modulators; Bandpass delta-sigma modulator; Distortion ratio; Signal bandwidth; Standard CMOS process; Supply voltages; Very low voltage; Voltage multipliers; Modulators
Type
conference paper