Title :
A 17.1-17.3-GHz image-reject downconverter with phase-tunable LO using 3× subharmonic injection locking
Author :
Yue, Stephen Y. ; Ma, Dennis K. ; Long, John R.
Author_Institution :
Synopsys Canada Inc., Mississauga, Ont., Canada
Abstract :
A 17-GHz RF receiver, consisting of a low-noise amplifier (LNA) and doubly balanced mixers coupled by a monolithic 3.7:1 step-down transformer, realizes over 75 dB of image rejection in a production 100-GHz fT SiGe BiCMOS technology. A new coupling transformer winding improves the magnetic coupling coefficient by more than 20% compared to conventional designs, which reduces parasitic effects and increases the overall efficiency of the LNA/mixer combination. Quadrature LO signals with electronically tunable phase are generated by a subharmonically injection-locked oscillator. The measured receiver IIP3 is -5.1 dBm with 17.3-dB conversion gain and 6.5-dB noise figure (SSB 50 Ω) at 17.2 GHz. The 1.9×1.0 mm2 IC consumes 62.5 mW from a 2.2-V supply.
Keywords :
BiCMOS integrated circuits; baluns; image convertors; injection locked amplifiers; injection locked oscillators; mixers (circuits); radio receivers; silicon; transformer windings; wireless LAN; 100 GHz; 17.1 to 17.3 GHz; 17.3 dB; 2.2 V; 6.5 dB; 62.5 mW; LNA/mixer combination; RF receiver; SiGe; SiGe BiCMOS; coupling transformer winding; doubly balanced mixers; image reject downconverter; image rejection; image-reject mixing; injection-locked oscillator; low-noise amplifier; low-power design; low-voltage design; magnetic coupling coefficient; monolithic step-down transformer; phase-tunable LO; quadrature LO signals; subharmonic injection locking; transformer balun; wireless downconverter; wireless local-area networking; BiCMOS integrated circuits; Couplings; Germanium silicon alloys; Injection-locked oscillators; Low-noise amplifiers; Production; Radio frequency; Signal generators; Silicon germanium; Windings; 65; Image-reject mixing; LNA; low-noise amplifier; low-power design; low-voltage design; transformer balun; wireless downconverter; wireless local-area networking;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2004.836343
