A 1.93 pA/&amp;#x221A;Hz transimpedance amplifier for 2.5 Gb/s optical communications

Shahdoost, Shahab; Medi, Ali; Saniei, Namdar

doi:10.1109/iscas.2011.5938235

Cited by 11 publications

(15 citation statements)

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“…In TIA design usually common gate (CG) and/or shunt-feedback amplifier are/is employed [1][2][3][4][5][6]. The shunt-feedback TIA can provide a higher transimpedance gain as compared to CG TIA.…”

Section: Introductionmentioning

confidence: 99%

Design of broadband transimpedance amplifier for optical communication systems

Seifouri

Amiri

Rakide

2015

Microelectronics Journal

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Section: Introductionmentioning

confidence: 99%

Design of broadband transimpedance amplifier for optical communication systems

Seifouri

Amiri

Rakide

2015

Microelectronics Journal

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“…In this paper, transimpedance amplifier parameters such as transimpedance gain, power consumption and output voltage are studied in 0.35µm CMOS technology. Figure 2 shows CMOS transimpedance amplifier circuit used a push-pull inverter at the input to maximize the transconduction of amplifier [4] and increases its gain bandwidth product (GBP).…”

Section: Introductonmentioning

confidence: 99%

“…It is relatively high bandwidth and dynamic range as well as a good noise level. Figure 2 shows CMOS transimpedance amplifier circuit used a push-pull inverter at the input to maximize the transconduction of amplifier [4] and increases its gain bandwidth product (GBP). …”

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confidence: 99%

A Study on Transimpedance Amplifier in 0. 35 µm CMOS Technology

Singh¹,

Shankar²,

Kumar³

2012

IJCA

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This paper presents a design of the transimpedance amplifier using 0.35µm CMOS technology. In the proposed transimpedance amplifier, feedback resistor R F of conventional transimpedance amplifier has been replaced by NMOS transistor as an active feedback resistor. This circuit operates at 3.3V power supply voltage and for a photocurrent of 0.5µA.The proposed transimpedance amplifier having low noise, high gain and large dynamic range. KeywordsTransimpedance amplifier, CMOS technology, low noise amplifier, optical receive, negative feedback. INTRODUCTONA transimpedance amplifier (TIA) is a circuit that converts a current signal into output voltage signal whose voltage is dependent on magnitude of current. The demand of higher data rates transportation over the internet and multimedia communication in recent years result in fast development of high speed optical communication system. Transimpedance amplifiers are very useful circuit components in optical communication system. Front-end of transimpedance amplifier (TIA) is one of most critical building block at electro optical interface on receiver side, which determines the performance of whole system to a large extent, such as speed, gain, sensitivity and noise etc. The performance of optical interconnection system depends on receiver gain, bandwidth, noise and power consumption. Silicon-based CMOS technology [1] is the only candidate which can achieve the required level of integration with reasonable speed, gain, cost, power consumption. The transimpedance amplifier [2] uses a closed loop circuits as shown in figure 1. This circuit allows not only to avoid the problem of the dynamic range, but also to obtain a trade-off between the high and low impedance configuration. It is relatively high bandwidth and dynamic range as well as a good noise level. Figure 2 shows CMOS transimpedance amplifier circuit used a push-pull inverter at the input to maximize the transconduction of amplifier [4] and increases its gain bandwidth product (GBP). CIRCUIT DISCRIPTION Figure 2: CMOS transimpedance amplifierThe transimpedance amplifier takes a current from input and converts it into a voltage signal. The transistor T1 and T3 from the inverter while T2 is added to increases the bandwidth and minimize the miller effect.

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“…Input parasitic capacitances of photodiode, electro-static discharge (ESD) circuit, and input PAD at the input of TIAs primarily constrain their bandwidth and noise performances [6]. As a result, different input topologies have been proposed to relax the effect of input capacitance, such as common gate (CG) [7], regulated cascode (RGC) [6,17], common drain (CD) [8], and common source (CS) [5]. At first glance, CG and RGC topologies seem better candidates in terms of relaxing the effect of input parasitic capacitances, but high current noise contribution of the load and input transistors in these topologies, degrades the noise performance drastically [4].…”

mentioning

confidence: 99%

“…As shown in Fig. 2, we proposed [5] a TIA with capacitive feedback network for maintaining high gain and low noise at the same time. Also a circuit level solution for the DC dark current in this topology is provided.…”

mentioning

confidence: 99%

A novel design methodology for low-noise and high-gain transimpedance amplifiers

Shahdoost

Medi

Bozorgzadeh

et al. 2014

2014 Argentine Conference on Micro-Nanoelectronics, Technology and Applications (EAMTA)

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This paper reports on design and measurement results of a state of the art low-noise and high-gain transimpedance amplifier (TIA) implemented in 0.18 μm TSMC CMOS technology. Thorough design methodology for high gain and low power TIA design for 2.5 Gb/s optical communication circuits family is presented. A noiseless capacitive feedback is proposed and implemented as a noise efficient feedback network for TIA circuits. Besides, analytical noise calculations in this family of TIA circuits are presented and optimum noise criteria are derived. The saturation and instability problem of TIA circuits resulted from DC dark current of the input photodiodes (PDs) is addressed and a circuit level solution is presented. The measurement results of 0.18 μm chip shows bandwidth of 52 kHz to 1.62 GHz, and transimpedance gain of 75.5 dB while dissipating 26.3 mW from a 2.2 V power supply, including the output buffer. Taking advantage of proposed capacitive feedback network and optimum noise criteria, noise measurement results show average input referred current noise of 3.18 pA/Hz for this TIA in the bandwidth of operation. Index Terms-Current-input circuits, low-noise circuits, optical communications, transimpedance amplifiers I. INTRODUCTIONECENTLY, transimpedance amplifiers are being used in a very wide range of applications such as optical communications (families of 2.5, 10, 25,... Gb/s), mechanical sensors, biosensors, and other specific bio-applications like DNA sequencing, and impedance spectroscopy [1][2][3][4]. This broad range of applications results in different sets of constrains for a circuit designer when designing a TIA. While in high speed families of optical communication circuits the main goal is pushing the bandwidth of TIA higher in GHz range [4], bio-application TIAs usually stay in much lower frequency ranges but at the same time demand better noise performances and lower power consumption for chronic/long-term implantable versions [1][2][3]. So, the first question to be addressed in a TIA design is which application

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A 1.93 pA/√Hz transimpedance amplifier for 2.5 Gb/s optical communications

Cited by 11 publications

References 11 publications

Design of broadband transimpedance amplifier for optical communication systems

Design of broadband transimpedance amplifier for optical communication systems

A Study on Transimpedance Amplifier in 0. 35 µm CMOS Technology

A novel design methodology for low-noise and high-gain transimpedance amplifiers

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