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Design of a wide-band frequency synthesizer based on TDC and DVC techniques

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5 Author(s)
Terng-Yin Hsu ; Dept. of Electron. Eng., Ming-Hsing Inst. of Technol., Hsinchu, Taiwan ; Terng-Ren Hsu ; Chung-Cheng Wang ; Yi-Chuan Liu
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A wide-band frequency synthesizer based on time-to-digital (TDC) and digital-to-voltage (DVC) conversion techniques is proposed here. The proposed frequency synthesizer has the capabilities of jitter reduction and large bandwidth, making it more robust for high-frequency applications. A test chip is designed and fabricated in 0.6-μm CMOS single-poly triple-metal process. Here, the novel DVC circuit is realized by tristate inverters, where the resolution can achieve 0.2 mV. Control stability of jitter can improve about 24 dB by exploiting the TDC-based controller. In order to achieve high output frequency and large output range, an analog voltage-controlled oscillator is designed to provide a locked range from 900 to 1900 MHz with <22 kHz resolution at 3.3 V. Simulation and test results show that the proposal can work as expected. Moreover, the TDC-based controller can be treated as soft IP to speed up turnaround time.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:37 ,  Issue: 10 )

Date of Publication:

Oct 2002

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