Browsing by Author "Lin, Wei-Zhen"

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A 0.75-2.67 GHz 5-bit Vector-Sum Phase Shifter
(2013)
Yan, Tzu-Chao
;
Lin, Wei-Zhen
;
Kuo, Chien-Nan
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
A 5-bit active vector-sum phase shifter operated in 0.75-2.67 GHz is implemented in 0.18-mu m CMOS technology. A tunable RC quadrature all-pass filter and a resistor-string VGA are proposed for quadrature phase generation and magnitude ratio tuning, respectively. The chip size is 0.89 mm(2). The DC power consumption of core circuit is 6.39 mW from 1.8 V supply. The RMS magnitude error and RMS phase error are below 0.74 dB and 7.2 degrees.
An Inductorless RC-based Quadrature Phase Generator and Its Application to Vector-Sum Phase Shifter
(2014-01-01)
Yan, Tzu-Chao
;
Lin, Wei-Zhen
;
Kuo, Chien-Nan
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
An inductorless quadrature phase generator is designed and implemented in 0.18 mu m CMOS technology. The proposed circuit is composed of two resistors, two capacitors, and four differential amplifiers. The performance of proposed circuit is verified by a single sideband (SSB) mixer and a vector-sum phase shifter. Measurement results show that the image rejection ratio is 42.38 dBc at 2.16 GHz. The measured RMS phase error and RMS magnitude error are below 3.5 degrees and 0.55 dB in 2-2.6 GHz, respectively.