A 32Gb/s wireline receiver with a low-frequency equalizer, CTLE and 2-tap DFE in 28nm CMOS

Parikh, Samir; Kao, Tsung Sheng; Hidaka, Y.; Jiang, Jian Hong; Toda, A.; McLeod, Scott; Walker, William W.; Koyanagi, Yoichi; Shibuya, Toshiyuki; Yamada, Jun

doi:10.1109/isscc.2013.6487622

Cited by 69 publications

(33 citation statements)

References 3 publications

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“…2(a) [4]. The LFEQ compensates for the long-term ISI from low frequency band signal, and the CTLE compensates for the short-term ISI due to the high frequency signal loss.…”

Section: A Low Frequency Equalizing-embedded Ctle (Lfe-ctle)mentioning

confidence: 99%

“…In order to reduce both the number of DFE taps and the power consumption, we proposed a low-frequency equalizing continuous-time linear equalizer (LFE-CTLE), followed by a 2-tap DFE for 28-Gb/s data rate. The proposed CTLE not only compensates for the channel loss at high-frequency (>14GHz=28GHz/2) but also mitigates the long-term ISI tail caused by the slight slope (<4dB) of the loss at low-frequency (<1GHz) in the channel [4]. Previously, the low-frequency equalizer [4] was proposed to mitigate the long-term ISI tail.…”

Section: Introductionmentioning

confidence: 99%

“…The proposed CTLE not only compensates for the channel loss at high-frequency (>14GHz=28GHz/2) but also mitigates the long-term ISI tail caused by the slight slope (<4dB) of the loss at low-frequency (<1GHz) in the channel [4]. Previously, the low-frequency equalizer [4] was proposed to mitigate the long-term ISI tail. However, it requires additional power consumption compared to the conventional linear equalizer.…”

Section: Introductionmentioning

confidence: 99%

“…In the high-speed DFE with 2 or more tap, the previous works mostly used a speculative DFE to guarantee the critical timing margin of feedback loop. However, a 2-tap speculative DFE consumes large power consumption for additional latches, multiplexers, and summation nodes [3][4]. In addition, the data rate is strictly limited due to the delay of the latches and multiplexers in limited power consumption [5].…”

Section: Introductionmentioning

confidence: 99%

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A 24-mW 28-Gb/s wireline receiver with low-frequency equalizing CTLE and 2-tap speculative DFE

Kim

Bae

et al. 2015

2015 IEEE International Symposium on Circuits and Systems (ISCAS)

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In this paper, a power-efficient equalization techniques is proposed for a high data-rate multi-standard wireline receiver. First, a low-frequency-equalizing continuoustime linear equalizer (LFE-CTLE) compensates for not only the short-term inter-symbol interference (ISI) from high-frequency channel loss but also the long-term ISI from the low-frequency channel loss without additional power consumption compared to the previous CTLE. LFE-CTLE can reduce the required number of taps and power consumption of the following decision feedback equalizer (DFE). A 2-tap speculative DFE adopts 4-phase clocking techniques to reduce the number of summation nodes and latches for low-power consumption. The proposed receiver is designed in 65-nm LP CMOS technology with 1.-2V supply voltage. It can achieve 28-Gb/s data rate with a 24-mW power efficiency.Keywords-Continuous-time linear equalizer (CTLE), decision feedback equalizer (DFE), equalizer, intersymbol interference (ISI), low frequency equalizer (LFEQ), unrolled DFE, speculative DFE

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“…2(a) [4]. The LFEQ compensates for the long-term ISI from low frequency band signal, and the CTLE compensates for the short-term ISI due to the high frequency signal loss.…”

Section: A Low Frequency Equalizing-embedded Ctle (Lfe-ctle)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A 24-mW 28-Gb/s wireline receiver with low-frequency equalizing CTLE and 2-tap speculative DFE

Kim

Bae

et al. 2015

2015 IEEE International Symposium on Circuits and Systems (ISCAS)

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“…The frequency response of the passive equalizer has a zero whose location is programmable independently from the attenuation and can vary in the hundreds of megahertz range. Measurements demonstrate its effectiveness for the equalization of lowfrequency losses such as those due to the skin effect [2].…”

Section: Introductionmentioning

confidence: 99%

A 16 Gb/s receiver with DC wander compensated rail-to-rail AC coupling and passive linear-equalizer in 22 nm CMOS

Francese

Toifl

Brändli

et al. 2014

ESSCIRC 2014 - 40th European Solid State Circuits Conference (ESSCIRC)

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A 16 Gb/s receiver implemented in 22 nm SOI CMOS technology is reported. The analog frontend accepts a rail-to-rail input common-mode imposed from the transmitter side. It consists of a baseline wander compensated passive linear equalizer that AC-couples the received signal to the subsequent active CTLE with a regulated common-mode level. The programmable passive linear equalizer features a frequency response suitable for low-frequency equalization such as for skineffect losses. When its zero is programmed at 200 MHz minimum frequency, the measured maximum mid-band peaking is 7 dB. The receiver architecture is half-rate and comprises an 8-tap DFE and a baud-rate CDR. With no FFE at the transmitter, 0.9 Vppd PRBS31 NRZ data are recovered error-free (BER<10 -12 ) across a copper channel with 34 dB attenuation at 8 GHz.

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Optical‐Electrical‐Optical (O‐E‐O) Switches

Mukherjee

2022

Optical Switching

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A 32Gb/s wireline receiver with a low-frequency equalizer, CTLE and 2-tap DFE in 28nm CMOS

Cited by 69 publications

References 3 publications

A 24-mW 28-Gb/s wireline receiver with low-frequency equalizing CTLE and 2-tap speculative DFE

A 24-mW 28-Gb/s wireline receiver with low-frequency equalizing CTLE and 2-tap speculative DFE

A 16 Gb/s receiver with DC wander compensated rail-to-rail AC coupling and passive linear-equalizer in 22 nm CMOS

Optical‐Electrical‐Optical (O‐E‐O) Switches

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