A Wide-band Reference-less Bidirectional Continuous-Rate Frequency Detector

被引:0
|
作者
Pham Manh Ha [1 ]
Nguyen Huu Tho [2 ]
Hoang Hong Hanh [2 ]
Quang Nguyen-The [2 ]
机构
[1] Vietnam Telecommun Author, 115 Tran Duy Hung, Hanoi, Vietnam
[2] Le Quy Don Tech Univ, Dept Commun Engn, 236 Hoang Quoc Viet, Hanoi, Vietnam
关键词
Bidirectional frequency detector; reference-less; wide-band; continuous-rate; clock and data recovery; CLOCK;
D O I
10.1109/sigtelcom.2019.8696267
中图分类号
TP301 [理论、方法];
学科分类号
081202 ;
摘要
This paper presents a wide-band half-rate frequency locked loop (FLL) circuit in 180 nm CMOS process. The bidirectional FLL includes a coarse frequency detector (CFD) and a fine frequency detector (FFD) to automatically detect a change in input data rate, acquires the new frequency without the need for an external reference clock or any programming. A modified CFD is proposed to reduce the frequency acquisition time. The simulation shows the FLL achieves wide lock range of 400Mb/s-to-2.6Gb/s and frequency acquisition time of 1.73 mu s.
引用
收藏
页码:25 / 29
页数:5
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