A 4 × 5-Gb/s reference-less receiver is proposed in a 0.13-μm CMOS technology. In the proposed reference-less clock and data recovery (CDR) circuit, asynchronous sampling-based frequency acquisition is proposed to achieve a fast frequency locking, and VCO calibration is proposed to attain a constant loop bandwidth. To reduce noise caused by multiple VCOs, a clock signal is forwarded from the main channel to the subchannels, and skews between the channels are compensated by a skew compensation algorithm. In the main channel, the reference-less CDR achieves a 1.12-μs locking time, and the measured standard deviation of VCO gain is reduced from 0.33 to 0.08. The recovered clock jitter in the main channel is 1.591 psrms, and the power consumption of the main channel and the subchannels are 3.53 and 2.16 mW/Gb/s, respectively.
|Number of pages||10|
|Journal||IEEE Transactions on Very Large Scale Integration (VLSI) Systems|
|Publication status||Published - 2016 Aug|
Bibliographical notePublisher Copyright:
© 2016 IEEE.
- Clock and data recovery (CDR)
- VCO calibration
- deskew algorithm
- frequency detection
- multichannel interface
- referenceless receiver
ASJC Scopus subject areas
- Hardware and Architecture
- Electrical and Electronic Engineering