Transimpedance Limit Exploration and Inductor-Less Bandwidth Extension for Designing Wideband Amplifiers

Chen, Oscal T.‐C.; Chan, Cheng-Ta; Sheen, R.R.-B.

doi:10.1109/tvlsi.2015.2394809

Cited by 12 publications

(6 citation statements)

References 10 publications

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“…From ( 5), ( 8), (12), |Z AL | > R D ( i.e., R D < 1/g m2 ) and approximation similar to shunt-shunt CS-TIA in [26], implies |Z BAL | > |Z BR |. Similarly, comparing ( 6) and (14) gives BW BAL > BW BR .…”

Section: Proposed Tia: Ce Tia With Active Inductive Peakingmentioning

confidence: 85%

“…Design has been done as per the design procedure discussed in section IV. Specifications of the design have been achieved by following the mathematical analysis given in section V and using the following equations: (8) for active inductor pole position, (12) for transimpedance gain, ( 14) for bandwidth and (15) for input-referred noise calculations. Further, the values of component parameters were optimized iteratively based on the post-layout electromagnetic (EM) simulation results.…”

Section: A Design and Simulation Of Ku-band Tiamentioning

confidence: 99%

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Single Stage Low Noise Inductor-Less TIA for RF Over Fiber Communication

Kumar

Saravanan²,

Duraiswamy

et al. 2021

IEEE Access

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This paper presents design, mathematical analysis, and measurement of low noise singlestage transimpedance amplifier (TIA) with scalable bandwidth using 130 nm bipolar complementary metaloxide-semiconductor (BiCMOS) silicon-germanium (SiGe) process. Common-emitter (CE) shunt-shunt feedback topology with active inductor peaking has been used in the design for improving noise, gain and driving capability of TIA by decreasing the input and output impedance, respectively. The use of active inductive peaking in CE shunt-shunt feedback topology has resulted in a new TIA configuration with better performance. The circuit has been optimized for low noise performance by adopting the proposed design technique. Validity of the mathematical analysis and design for the proposed TIA has been established with the help of simulations as well as measurement results. The measurement results of Ku-band TIA (10 MHz to 14 GHz) have demonstrated a transimpedance gain of 53.2 dBΩ, input-referred current noise of 16.8 pA/ √Hz with power consumption of 9.8 mW . The design architecture is adaptable for higher frequency bands, which has been demonstrated by designing another TIA covering K-and Ka-bands (10 MHz to 35 GHz) with transimpedance gain of 33.4 dBΩ, input-referred current noise of 29.4 pA/ √Hz with power consumption of 28.1 mW in the post-layout simulation results, and occupies same chip area as that of 14 GHz, i.e., 0.1 × 0.21 mm 2 INDEX TERMS BiCMOS, CE topology, inductive peaking, low noise, silicon-photonics, TIA

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Section: Proposed Tia: Ce Tia With Active Inductive Peakingmentioning

confidence: 85%

Section: A Design and Simulation Of Ku-band Tiamentioning

confidence: 99%

Single Stage Low Noise Inductor-Less TIA for RF Over Fiber Communication

Kumar

Saravanan²,

Duraiswamy

et al. 2021

IEEE Access

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“…A vertical eye-opening of 20 mV with a width of 0.1 UI at a BER of 1E-6 is achieved. Finally, Table III compares performance of the proposed TIA with the state-of-the-art inductorless TIAs [35][36][37][38]. Reference [10] employs inductors and transformers to improve the GBP without sacrificing the power consumption.…”

Section: Implementation Of Negative Capacitance Generation Circuitmentioning

confidence: 99%

An Inductorless Optical Receiver Front-End Employing a High Gain-BW Product Differential Transimpedance Amplifier in 16-nm FinFET Process

Kashani

Shakiba

Sheikholeslami

2023

IEEE Open J. Circuits Syst.

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In this paper, a fully-differential transimpedance amplifier (TIA) providing a high gain-BW product (GBP) is introduced. In the proposed architecture, a cascode cross-coupled structure is employed to double the effective transconductance of the cascode devices, improving the BW of the TIA. Moreover, a differential architecture is implemented using an RC highpass filter along with a buffer stage requiring smaller capacitance and resistance. Furthermore, a single-ended negative capacitance generation (NCG) circuit is employed at the input of the TIA to partially compensate for the input parasitic capacitances. A TIA including the proposed techniques, designed and laid out in a 16-nm FinFET process, demonstrates 57% and 79% better figure-of-merit compared to cascode and conventional TIAs designed along with the proposed TIA for a fair comparison, respectively. Post-layout simulations in companion with statistical analysis are employed to verify the effectiveness of the proposed architecture. From simulation results, the optical receiver achieves a peak transimpedance gain of 58.5 dBΩ, a BW of 14.8 GHz, an input-referred noise of 33.6 pA/√Hz, and an eye-opening of 30 mV at a data-rate of 56 Gbps PAM4 and at a bit-error-rate (BER) of 1E-6. The whole circuit consume 49 mW and occupies an active area of 0.0076 mm 2 .

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“…Therefore, in the second step of the proposed design technique, a high-frequency peaking is intentionally introduced in the main amplifier's amplitude response without impairing its low-frequency gain. Various possible designs of active feedback-based MA architectures [7][8][9][10] can introduce the required peaking by adding a pole in their feedback loops. The amplitude peaking in the equalizing main amplifier (EMA) is then used to compensate for the TIA's limited bandwidth to restore an overall bandwidth of approximately 0.5 f bit .…”

Section: Introductionmentioning

confidence: 99%

“…Further, a 1st-order CTLE stage has a limited capability in equalizing a second-order TIA [6,12] which necessitates cascading several equalizer stages, further increasing power and area overheads. On the other hand, various inductorless feedback techniques can be used to design main amplifiers with gain-bandwidth products (GBW) far superior to a cascade of first-order stages [7][8][9][10]. The improvement is the result of poles moving away from the In contrast to traditional continuous-time linear equalizer (CTLE)-based designs [6,11], the proposed front-end attains the improved sensitivity and high-gain of these designs, while achieving better energy efficiency due to the elimination of the standalone equalizer stage(s).…”

Section: Introductionmentioning

confidence: 99%

A Novel Inductorless Design Technique for Linear Equalization in Optical Receivers

Abdelrahman

Williams

Liboiron-Ladouceur

et al. 2022

JLPEA

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To mitigate the trade-off between gain and bandwidth of CMOS multistage amplifiers, a receiver front-end (FE) that employs a high-gain narrowband transimpedance amplifier (TIA) followed by an equalizing main amplifier (EMA) is proposed. The EMA provides a high-frequency peaking to extend the FE’s bandwidth from 25% to 60% of the targeted data rate (fbit). The peaking is realized by adding a pole in the feedback paths of an active feedback-based wideband amplifier. By embedding the peaking in the main amplifier (MA), the front-end meets the sensitivity and gain of conventional equalizer-based receivers with better energy efficiency by eliminating the equalizer stages. Simulated in TSMC 65 nm CMOS technology, the proposed front-end achieves 7.4 dB and 6 dB higher gain at 10 Gb/s and 20 Gb/s, respectively, compared to a conventional front-end that is designed for equal bandwidth and dissipates the same power. The higher gain demonstrates the capability of the proposed technique in breaking the gain-bandwidth trade-off. The higher gain also reduces the power penalty incurred by the decision circuit and improves the sensitivity by 1.5 dB and 2.24 dB at 10 Gb/s and 20 Gb/s, respectively. Simulations also confirm that the proposed FE exhibits a robust performance against process and temperature variations and can support large input currents.

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Transimpedance Limit Exploration and Inductor-Less Bandwidth Extension for Designing Wideband Amplifiers

Cited by 12 publications

References 10 publications

Single Stage Low Noise Inductor-Less TIA for RF Over Fiber Communication

Single Stage Low Noise Inductor-Less TIA for RF Over Fiber Communication

An Inductorless Optical Receiver Front-End Employing a High Gain-BW Product Differential Transimpedance Amplifier in 16-nm FinFET Process

A Novel Inductorless Design Technique for Linear Equalization in Optical Receivers

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