Title :
Equalization of IM3 Products in Wideband Direct-Conversion Receivers
Author :
Keehr, Edward ; Hajimiri, Ali
Author_Institution :
California Inst. of Technol., Pasadena, CA
Abstract :
The wideband direct-conversion receiver architecture is proposed in this paper. In order to provide a quantitative design objective, the UMTS standard is targeted. The single-ended-to-differential conversion previously handled by an inter-stage SAW filter is now performed by a balun. The balun is followed by high-P2 MP mixers driven by Cherry-Hooper LO buffers. The MP BB filter is an active-RC 3 rd-order Chebyshev architecture that drives an 8b pipelined ADC with fs=50 MHz. The AP is a scaled-down version of the MP, with the primary difference being the inclusion of an IM3 generator. As scaling reduces the breakdown voltage of CMOS devices and as system integration trends demand the further elimination of off- chip components, there arises a great need to improve the linearity of RF receivers.
Keywords :
3G mobile communication; CMOS integrated circuits; Chebyshev filters; active filters; equalisers; mixers (circuits); radio receivers; CMOS device; Cherry-Hooper LO buffer; MP BB filter; RF receiver; UMTS standard; active-RC 3 rd-order Chebyshev architecture; high-P2 MP mixer; wideband direct-conversion receiver; 3G mobile communication; Adaptive equalizers; Baseband; Circuits; Convergence; Finite impulse response filter; Impedance matching; Radio frequency; SAW filters; Wideband;
Conference_Titel :
Solid-State Circuits Conference, 2008. ISSCC 2008. Digest of Technical Papers. IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4244-2010-0
Electronic_ISBN :
978-1-4244-2011-7
DOI :
10.1109/ISSCC.2008.4523128