Title :
A rail-to-rail input receiver employing successive regeneration and adaptive cancellation of intermodulation products
Author :
Keehr, Edward A. ; Hajimiri, Ali
Author_Institution :
California Inst. of Technol., Pasadena, CA, USA
Abstract :
A direct conversion receiver is demonstrated which operates in the presence of a rail-to-rail (+12.4dBm) out-of-band blocker and a -16.3dBm blocker, where the ICP1 is +12.5dBm and the uncorrected extrapolated IIP3 is +33.5dBm. IM distortion is adaptively cancelled via feedforward loops which are digitally expanded to reproduce higher order nonlinear reference terms. Cancellation improves input-referred total IM distortion by over 24dB, resulting in an extrapolated IIP3 of +45.3dBm.
Keywords :
CMOS integrated circuits; interference suppression; intermodulation; linearisation techniques; mixed analogue-digital integrated circuits; radio receivers; radiofrequency integrated circuits; IM distortion; RF CMOS technology; RF receiver; adaptive cancellation; direct conversion receiver; extrapolated IIP3; feedforward loop; intermodulation product; mixed signal linearization; nonlinear circuit; out-of-band blocker; rail-to-rail input receiver; size 90 nm; successive regeneration; Adaptive equalizers; Adaptive filters; Baseband; Digital modulation; Nonlinear circuits; Nonlinear distortion; Radio frequency; Rail to rail inputs; Receivers; Signal generators; Adaptive equalization; RF receivers; feedforward cancellation; mixed-signal linearization; nonlinear circuits; wireless communications;
Conference_Titel :
Radio Frequency Integrated Circuits Symposium (RFIC), 2010 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4244-6240-7
DOI :
10.1109/RFIC.2010.5477407
