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A Novel, Low-Voltage, Current Reused, Quadrature VCO and Divide-by-4 Frequency Divider Circuit

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2 Author(s)
Wei Li ; Dept. of Electron. Eng., Chinese Univ. of Hong Kong, Hong Kong, China ; Cheng, K.-K.M.

A low-voltage, current-reused, quadrature voltage controlled oscillator (QVCO) and divide-by-4 frequency divider (FD4) architecture is presented for the first time. The proposed architecture features compact and low voltage operation by the proper stacking of a ring-type injection locked FD4 and a back-gate coupled QVCO. This design lowers the power consumption and eliminates the need of high frequency divider as well as buffering stage. The circuit has been implemented in 0.18-μm triple-well CMOS process. Experimental results show a phase noise level of -114.1 dBc/Hz at 1 MHz offset from carrier (2.2 GHz). This chip occupies a core area of 0.9×0.35 mm2 and consumes 2.7 mA from a 1.3 V power supply.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:23 ,  Issue: 2 )

Date of Publication:

Feb. 2013

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