Design Optimization of a High-Speed Modified Uni-traveling-Carrier Photodiode

Xiong, Wanshu; Guo, Qianwen; Yao, Ruoyun; Chen, Ji

doi:10.1364/cleo_at.2022.jw3b.145

Cited by 1 publication

(4 citation statements)

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“…A challenge with typical PIN diode is how to maintain a large capacitive intrinsic region that is acceptable for wireless optical receiver, as illustrated and described with a reasonable solution by Sibley et al [1]- [3]. The main problem of receiver yield is the requirement to have a wide range of capacitive impedance handling at the same time.…”

Section: Introductionmentioning

confidence: 99%

“…Referring to Figure 1, Iph is photocurrent, Rbulk represents bulk resistance, Rb is the bias resistance an Cd represents capacitance device, Cs is stray capacitance. According to theory, Rbulk effect is assumed to be small [1]. Therefore, the equivalent circuit reduces to Iph parallel with Rb and (Cs + Cd).…”

Section: Introductionmentioning

confidence: 99%

“…1.1 Frequency compensation and Equalization technique. In any receiver system design, the widely known problem involves large source impedance and capacitance components, requiring equalization [10]- [12], [18]- [19]. This is associated directly with the characteristic of correcting the triangular frequency response, near the corner frequency.…”

Section: Introductionmentioning

confidence: 99%

“…The transfer function in equation (10) shows that feedback resistor, Rf is vital in determining the gain output for the receiver circuit. It is observed that the amplifier gain of the overall system increases as feedback resistor, Rf value increases, but the overall gain system decreases in the amplification second stage as the feedback resistor, Rf1 value increases.…”

mentioning

confidence: 99%

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Adaptive Composite Bandwidth and Automatic Gain Control Receiver for 6G Wireless Optical Communication

Das,

Agbinya,

Abdullah

et al. 2024

Preprint

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The advent of 6G communication promises a transformative leap in wireless connectivity, ushering in an era of unprecedented data rates, ultra-low latency, and pervasive connectivity. To harness the full potential of 6G networks, it is imperative to address the unique challenges posed by evolving communication environments. In this context, we present a novel framework that integrates Adaptive Composite Bandwidth and Automatic Gain Control (AGC) techniques into the 6G communication paradigm. Optical wireless receivers experience large input current difference due to the large transmitted power, noise from ambient light and the varying efficiencies of different photodiode receivers. With its large dynamic range of µA to mA, transimpedance amplifiers are suitable to handle large variable photodiode efficiencies. The receiver design proposed in this article incorporates two characteristic parameter adjustments, namely bandwidth and automatic gain. By adjusting the bandwidth the signal-to-noise ratio of the incoming signal is automatically controlled. By controlling the bandwidth, the unwanted noise is reduced and amplifier output is liable to low noise and enhances the dynamic range without extra filtering. The automatic gain control adapts its gain based on slight change in the input signal at the receiver front-end. This optimization technique ensures low photo-detection and amplification noise to achieve better quality of service. The results indicate that bootstrap transimpedance amplifier gain is around 53.3 dB and frequency cut-off at 109.7 MHz. Thus, when gain control capacitance is varied between 50 pF to 1 nF, the bandwidth adjustment falls in the range 7.5-104.1 MHz, and the amplifier’s second stage gain becomes 10.4 dB. The overall gain of the proposed configuration with automatic gain control integrated into the transimpedance amplifier increases up to 31.1 dB, while the bandwidth adjusted from 9.4 MHz to 60.7 MHz. In results, gain bandwidth product is optimized from 10.4 dB to 31.1 dB. The main contribution to work is optimizing the product by selecting a capacitance value within the given range that maximizes the GBP. This value will provide the least gain-bandwidth product for effective noise reduction.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Adaptive Composite Bandwidth and Automatic Gain Control Receiver for 6G Wireless Optical Communication

Das,

Agbinya,

Abdullah

et al. 2024

Preprint

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show abstract

Design Optimization of a High-Speed Modified Uni-traveling-Carrier Photodiode

Abstract: We optimized an InGaAs/InP Modified Uni-Traveling-Carrier Photodiodes (MUTC-PDs) design with operation frequency above 200 GHz and responsivity greater than 0.14 A/W. Key device design parameters tradeoffs are systematically analyzed in depth.

Cited by 1 publication

References 2 publications

Adaptive Composite Bandwidth and Automatic Gain Control Receiver for 6G Wireless Optical Communication

Adaptive Composite Bandwidth and Automatic Gain Control Receiver for 6G Wireless Optical Communication

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