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A SAW-Less First Folded-Conversion Second Down-Conversion Receiver for Multistandard Broadcasting Radio Applications

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3 Author(s)
Keping Wang ; Inst. of RFand OE-ICs (IROI), Southeast Univ., Nanjing, China ; Zhigong Wang ; Xuemei Lei

A surface-acoustic-wave-less first folded-conversion and second down-conversion receiver for the AM/FM/digital radio mondiale (DRM)/digital audio broadcasting (DAB) radio standards is presented. This architecture is more suitable for broadcasting radio with ultra-narrow signal bandwidth since it relaxes the requirement on the local area (LO) generator by decreasing its tuning range. To reduce the blockers and out-of-band (OB) interferers, current amplifying and polyphase filters are introduced simultaneously. An inverter-based switched capacitor array technique is proposed in voltage-controlled oscillator (VCO) design to isolate the noise from the substrate. With a single VCO, the receiver can cover the frequency range from 100 kHz to 1.5 GHz. Without the RF pre-filters, the in-band IIP3 is 1.5 dBm, and the OB IIP3 is up to 17.4 dBm. The LO phase noise in the worst case is -119 dBc/Hz@1 MHz. The chip is fabricated in a 0.18-μm CMOS technology, and mounted on a QFN package. It consumes only 86.4 mW under 1.8-V supply. To our best knowledge, this is first receiver reported thus far that supports all four AM/FM/DRM/DAB standards.

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:61 ,  Issue: 4 )

Date of Publication:

April 2013

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