Title :
A 63-mA 112/94-dB DR IF bandpass ΔΣ modulator with direct feed-forward and double sampling
Author :
Yamamoto, Takaya ; Kasahara, Masumi ; Matsuura, Tatsuji
Author_Institution :
Renesas Technol. Corp., Takasaki
Abstract :
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.
Keywords :
CMOS integrated circuits; band-pass filters; delta-sigma modulation; discrete time filters; feedforward; tuning; AM-FM car radio tuners; CMOS technology; DR IF bandpass ΔΣ modulator; bandpass discrete-time DeltaSigma modulator; bandwidth 3 kHz; current 63 mA; direct feed-forward sampling; double sampling; frequency 10.7 MHz; frequency 200 kHz; intermediate frequency; word length 4 bit; CMOS technology; Capacitors; Delay; Digital modulation; Feedforward systems; Frequency modulation; Noise cancellation; Power harmonic filters; Sampling methods; Tuners;
Conference_Titel :
Custom Integrated Circuits Conference, 2007. CICC '07. IEEE
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4244-0786-6
Electronic_ISBN :
978-1-4244-1623-3
DOI :
10.1109/CICC.2007.4405681
