An Inverter-Based, CMOS, Low-Power Optical Receiver Front-End

Zohoori, Soorena; Dolatshahi, Mehdi; Pourahmadi, Majid; Hajisafari, Mahmoud

doi:10.1080/01468030.2019.1567871

Cited by 15 publications

(4 citation statements)

References 13 publications

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“…It consists of an active type of RGC, to present small values of resistance at input node, plus an extra gain stage which itself consists of a common drain structure to compensate the -3dB frequency limitations of the RB-TIA and a common source structure to provide further amplification for the signal. However, the input resistance of the RGC stage can be calculated as equation (4).…”

Section: The Proposed Tia Circuitmentioning

confidence: 99%

A Low-power, CMOS Optical Communication Receiver System for 5Gbps Applications based on RGC Structure

Honarmand

Zohoori

Abbasi

2020

mjee

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An optical communication receiver system is presented in this research using 65nm CMOS, which consists of three lowpower active differential stages as Limiting Amplifier (LA) following an ultra-low-power RGC-Based Transimpedance Amplifier (RB-TIA). The presented active circuit of the RB-TIA is followed by a gain stage that extends the-3dB frequency of the circuit by creating a resonance for the load capacitance. Thus, needless of consuming extra power, a wide-bandwidth circuit has been designed. In addition, employing active-inductor loads within the LA stages enables obtaining a 5Gbps receiver system. The RB-TIA consumes 573µW and provides 3.52GHz frequency, while the complete optical receiver consumes only 4.76mW power to provide-3dB frequency of 3.5GHz and high gain of 80dB (10'000). The circuits have been mathematically presented and discussed, and simulations have justified the presented circuit design.

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Section: The Proposed Tia Circuitmentioning

confidence: 99%

A Low-power, CMOS Optical Communication Receiver System for 5Gbps Applications based on RGC Structure

Honarmand

Zohoori

Abbasi

2020

mjee

Self Cite

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“…Because it has high speed and low loss, it carries a large amount of information [1,2,3]. Limiting amplifier (LA) is an indispensable part of optical communication system [4,5,6], and LOS detector is a key part of an LA. LOS detector in an LA is used to monitor input signal amplitude (𝑉 𝑝𝑒𝑎𝑘 ) [7].…”

Section: Introductionmentioning

confidence: 99%

Threshold-programmable loss-of-signal detection circuit with temperature compensation

Chen

Sun

et al. 2023

IEICE Electron. Express

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It is a challenge to implement a loss-of-signal (LOS) circuit with a wide threshold voltage range that is insensitive to temperature. This paper presents a new wide-range threshold-programmable LOS detector with full temperature compensation for application in 25Gb/s high-speed optical communication receivers. The wide-range programmable threshold voltage of the LOS detector is achieved by adjusting the threshold voltage of the peak detector and the gain of the variable gain amplifier (VGA). The detection accuracy is obviously improved by using offset self-cancellation technology for the comparator (COMP) and temperature compensation technology for the VGA and the peak detector. The LOS detector has been fabricated in 0.18 um BICMOS process and occupies 0.03 𝑚𝑚 2 . The programmable threshold voltage range is 11∼130 mV for the 25Gb/s nonreturn-to-zero code, the hysteresis is 2 dB, and the max detection error is 4 mV. The LOS detector consumes 2.18 mW from 1.8 V supply voltage.

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“…6,7 Yet, a large area is required on the chip. To solve this problem, the active inductive peaking method was introduced in previous studies [7][8][9][10] to conserve the area on the chip, besides broadening the frequency bandwidth. Some other alternative low-input resistance structure is wide-swing cascode structures 11,12 to amplify the signal in current-mirror arrangements.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, various studies have presented inverter structures as TIAs. 8,10,[13][14][15][16][17] Zohoori and Dolatshahi 8 use a cascoded inverter that broadens the frequency bandwidth. This is desirable for high data rates.…”

Section: Introductionmentioning

confidence: 99%

An improved low‐input resistance folded‐cascode transimpedance amplifier for giga‐bit per second optical communication front‐ends

Zohoori,

Hosseini,

Dehkordi

et al. 2023

Circuit Theory & Apps

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SummaryThe present study is devoted to articulating a modified folded‐cascode circuit, to make folded‐cascode structures an attractive configuration as a transimpedance amplifier (TIA) for being employed in Giga‐bit per second optical communication receiver systems. Giga‐bps communication receivers are highly necessitating circuits to isolate the input parasitic capacitance of the photodiode. The present modification makes folded cascodes comparable to the famous regulated cascode (RGC) structures by isolating this parasitic capacitor almost by the same quantity. The system is shown to be capable of operating at 2.5 Gbps up to 8 Gbps data rate with a fixed bandwidth. The paper analyzes and evaluates the designed circuit mathematically, and the obtained simulated results from Cadence using TSMC 65 nm CMOS validate the suitability of the modified circuit as a TIA.

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An Inverter-Based, CMOS, Low-Power Optical Receiver Front-End

Cited by 15 publications

References 13 publications

A Low-power, CMOS Optical Communication Receiver System for 5Gbps Applications based on RGC Structure

A Low-power, CMOS Optical Communication Receiver System for 5Gbps Applications based on RGC Structure

Threshold-programmable loss-of-signal detection circuit with temperature compensation

An improved low‐input resistance folded‐cascode transimpedance amplifier for giga‐bit per second optical communication front‐ends

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