Yi-Chieh HuangSHEN-IUAN LIU2018-09-102018-09-102011-0201936530http://scholars.lib.ntu.edu.tw/handle/123456789/366448https://www.scopus.com/inward/record.uri?eid=2-s2.0-79955710787&doi=10.1109%2fISSCC.2011.5746352&partnerID=40&md5=13b2984cbebb053136233de8d46b5b93To ensure the signal integrity over a lossy channel, an analog equalizer and/or a decision-feedback equalizer (DFE) [2-6] are widely adopted in high-speed data transmission. An adaptive analog equalizer or adaptive DFE is also attractive to compensate the frequency-dependent loss due to the different channel lengths and environment variations. Conventionally, a multiple-tap DFE is adopted to compensate the inter-symbol interference (ISI), which is induced by postcursors due to the non-ideal channel impulse responses. To avoid the power and area penalty due to many postcursors, a DFE with infinite impulse response (IIR) filter feedback [2] has been presented. In [2], no adaptation scheme ensures that such IIR filter cancels the postcursors precisely, i.e., its RC time constant and amplitude need to be manually adjusted. In this work, a 6Gb/s receiver using a DFE with an adaptive continuous-time IIR filter and a clock/data recovery (CDR) circuit is presented. In a high loss environment, a conventional digital qaudricor-relator frequency detector (QFD) may fail due to the significant data dependent jitter. To integrate an adaptive DFE with a CDR circuit, a proposed frequency-sweeping frequency detector (FD) and a lock detector (LD) are presented in this work. © 2011 IEEE.[SDGs]SDG7Clock and data recovery circuits (CDR circuits); Continuous time systems; Decision feedback equalizers; Feedback; Impulse response; Channel impulse response; Data-dependent jitter; Frequency detectors; Frequency sweeping; Frequency-dependent loss; High-speed data transmission; Infinite impulse response; RC time constants; IIR filtersconference paper10.1109/ISSCC.2011.57463522-s2.0-79955710787