Quadrature-Input Quadrature-Output Divider and Phase Locked Loop Frequency Synthesizer or Single Side Band Mixer雙平衡正交輸入正輸出分頻器
The invented double-balanced quadrature-input quadrature-output divider (QIQOD) is based on conventional multiplier-based regenerative dividers but employs four different feedback loops with appropriate phase shifts. By making use of quadrature phase outputs from any quadrature signal generator, the invented QIQOD provides smaller and better-matched input loading and smaller 3rd harmonics. In addition, the invented QIQOD provides a mechanism to achieve an output IQ phase sequence that is inherently tracked with the input IQ phase sequence.
A prototype QIQOD with inductive loads has been successfully demonstrated to operate at a frequency of 8.5 GHz and a supply voltage as low as 0.9V in TSMC 0.18-µm CMOS process. An image rejection of -62 dBc is measured at QIQOD output while consuming 7.2 mW.
A second prototype of two QIQOD train based on the invention but with resistive loads has been designed and fabricated to demonstrate the phase sequence tracking feature. Simulation shows that the output IQ phase sequence can track with the input IQ phase sequence automatically.
Phase-locked loops or synthesizers used to generate one or multiple quadrature phase signals can directly benefit from this invention to achieve much higher performance in terms of smaller and better-matched input loading, lower power consumption, and smaller chip area.
- For use in all data communication and telecommunication systems
Patent Number: US8140039B2
Application Number: US2007852702A
Inventor: Luong, Howard Cam | Zheng, Hui
Priority Date: 10 Sep 2007
Priority Number: US8140039B2
Application Date: 10 Sep 2007
Publication Date: 20 Mar 2012
IPC Current: H04B000700
US Class: 455260 | 327017 | 327018 | 327047 | 327057 | 327105 | 327117 | 327147 | 327156 | 327175 | 327177 | 331025 | 331158 | 331175 | 332127 | 375307 | 375344 | 375373 | 375375 | 375376 | 455075 | 455076 | 455147 | 4551651 | 4551831 | 4551921 | 455255 | 455264 | 455265 | 455316
Assignee Applicant: The Hong Kong University of Science & Technology
Title: Quadrature-input quadrature-output divider and phase locked loop frequency synthesizer or single side band mixer
Usefulness: Quadrature-input quadrature-output divider and phase locked loop frequency synthesizer or single side band mixer
Summary: Quadrature-input quadrature-output divider for use in a control latching circuit and a feedback loop of a phase locked loop (PLL) or a synthesiser (all claimed).
Novelty: Quadrature-input quadrature-output divider for use in e.g. feedback loop of phase locked loop or synthesizer, has combined output of mixers directed to quadrature-phase output of divider and fed-back to input of third mixer
电子
电路设计
10 Sep 2007
US 11/852702
US 8140039
TTC.PA.315
香港
