NDLI: Continuously auto-tuned and self-ranged dual-path PLL design with hybrid AFC

Content Provider	IEEE Xplore Digital Library
Author	Min Wang Bo Zhou Woogeun Rhee Zhihua Wang
Copyright Year	2011
Description	Author affiliation: Institute of Microelectronics, Tsinghua University, Beijing, China (Min Wang; Bo Zhou; Woogeun Rhee; Zhihua Wang)
Abstract	This paper describes a dual-path phase locked loop (PLL) design which automatically tunes to capture the desired frequency as well as the input control voltage range of the dual-path LC voltage-controlled oscillator (VCO). A hybrid automatic frequency calibration (AFC) circuit provides digital frequency calibration and mixed-mode continuous frequency tuning. Since the hybrid AFC circuit independently controls the coarse-tuning control voltage of VCO in this structure, the VCO input control voltage range can be preset before the PLL is locked. Therefore, an optimum loop filter voltage range can be chosen to have good charge pump matching or VCO gain linearity. Simulation results verify that the self-ranged control can be achieved by adjusting the output range of the limiting amplitude amplifier (LAA) during the PLL transient mode.
Starting Page	1
Ending Page	4
File Size	696553
Page Count	4
File Format	PDF
ISBN	9781424490196
e-ISBN	9781424490219
DOI	10.1109/ICICDT.2011.5783227
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-05-02
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase locked loops Voltage-controlled oscillators Frequency locked loops Tuning Bandwidth Voltage control
Content Type	Text
Resource Type	Article

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