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A 63-mA 112/94-dB DR IF bandpass ΔΣ modulator with direct feed-forward and double sampling

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3 Author(s)
Yamamoto, T. ; Renesas Technol. Corp., Takasaki ; Kasahara, M. ; Matsuura, T.

We developed a 10.7-MHz intermediate frequency (IF) bandpass discrete-time (DT) 4th -order 4-bit ΔΣ modulator for AM/FM car radio tuners. Using direct feed-forward and double sampling, we have achieved a dynamic range (DR) of 112 dB in the 3-kHz AM bandwidth (BW) and a DR of 94 dB in the 200-kHz FM BW. The modulator occupies 3 mm2, in 0.15 μm CMOS technology, and draws 63 mA of current.

Published in:

Custom Integrated Circuits Conference, 2007. CICC '07. IEEE

Date of Conference:

16-19 Sept. 2007

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