Title :
A 60 GHz Injection-Locked Frequency Tripler With Spur Suppression
Author :
Kuo, Chien-Nan ; Yan, Tzu-Chao
Author_Institution :
Dept. of Electron. Eng., Nat. Chiao-Tung Univ. (NCTU), Hsinchu, Taiwan
Abstract :
A 60 GHz injection-locked frequency tripler is designed to improve spectral purity with spur suppression of the fundamental and the even-order harmonics. Several circuit designs are utilized in the harmonic current injection circuit to maximize the third-order harmonic and minimize the undesired harmonic current outputs, including notch filters and a capacitive cross-coupled transistor pair. With the input signal of 0.5 dBm at 19.7 GHz, the harmonic rejection ratios of the fundamental, and the second-order achieve 31.3 dBc, and 45.8 dBc, respectively. Implemented in 0.13 m CMOS technology, the core circuit consumes power of 9.96 mW with 1.2 V supply voltage. The entire die occupies an area of 985 × 866 μm2.
Keywords :
CMOS integrated circuits; filters; frequency multipliers; harmonics; millimetre wave circuits; network synthesis; CMOS; capacitive cross-coupled transistor pair; circuit design; even-order harmonics; frequency 19.7 GHz; frequency 60 GHz; harmonic current injection circuit; injection-locked frequency tripler; notch filters; power 9.96 mW; size 0.13 mum; spectral purity; spur suppression; third-order harmonic; voltage 1.2 V; CMOS integrated circuits; Frequency measurement; Generators; Harmonic analysis; Loss measurement; Oscillators; Semiconductor device measurement; Capacitive cross-coupling; frequency tripler; injection-locking; notch filter;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2010.2060260
