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A Back-Gate Coupling Quadrature Voltage-Control Oscillator Embedded With Self Body-Bias Schema

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4 Author(s)
Janne-Wha Wu ; Dept. of Commun. Eng., Nat. Chung Cheng Univ., Chiayi, Taiwan ; Han-Hsin Wu ; Kai-Cheng Hsu ; Chang-Chun Chen

A quadrature voltage-controlled oscillator was designed with back-gate coupling and embedded self body-biasing and implemented with the TSMC 0.18 μm 1P6M CMOS technology. Without using any extra negative bias-pin in the current-reuse structure, this embedded body-bias schema makes the switching transistors become forward body-biased in the duration of turn-on. It is not only beneficial for low-voltage operation, but also achieves a high oscillating output power (-2.5 dBm) with less supply power (2.5 mW). The percentage of frequency tuning range is 17.5% (from 4.60 to 5.48 GHz). The phase noise is -114 dBc/Hz at 1-MHz offset from the carrier frequency of 5.48 GHz.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:23 ,  Issue: 3 )