10-Gb/s 0.13-<formula formulatype="inline"> <tex Notation="TeX">$\mu{\rm m}$</tex></formula> CMOS Inductorless Modified-RGC Transimpedance Amplifier

Abstract

This paper presents an inductorless 0.13-CMOS TIA structure that is a modified version of a regulated cascode (RGC) TIA. An immittance converter is incorporated to reduce power consumption while increasing transimpedance gain. Measured 3-dB bandwidth is 7 GHz, sufficient for 10-Gb/s operation, in the presence of 250 fF capacitance at the TIA input, representative of typical CMOS photodiode capacitance. The transimpedance gain of the single-stage TIA is 50 , and the group-delay variation is less than 19 ps over the 3-dB bandwidth. The circuit occupies an active area of and consumes 7 mW from a 1.5-V supply. The measured average input-referred current noise of the TIA is 31. Simulations and analysis show that the proposed single-stage TIA architecture is capable of achieving improvement in the transimpedance limit over a single-stage RGC TIA designed for the same data rate and the same input photodiode capacitance. A comparison of measurement results to published TIAs also demonstrates the competitive performance of the proposed TIA in terms of the TIA transimpendance gain, bandwidth, area, and power consumption. in 2011. He is currently working toward his Ph.D. degree at the University of Calgary. His research activity is focused on RF circuits and systems, including delay circuits and RF beamforming. Currently, he is conducting research on first-and second-order all-pass filters and their applications and on the design and fabrication of wideband spatial beamformers.

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

“…FoMs are used to allow us to make a fair comparison. In terms of FOM1, Kim and Buckwalter 19 and Taghavi 21 seem to show a better performance, but when taking more parameters into account, our design demonstrates significant superiority in terms of FOM2.…”

Employing bias current feedback in MIC transimpedance amplifier to increase bandwidth

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A low-power and high-gain frontend for GHz application using trans-impedance amplifier for fast particle detection

“…Some of the latest works proposed the regulated cascode (RGC) topology as the core of a fast TIA ASIC chip [14,[21][22][23]. As shown in figure 1(a), the RGC topology exhibits a transimpedance gain that is approximately proportional to the resistive load at the output node, that is, 𝑍 𝑇 ,𝑅𝐺𝐶 ≈ 𝑅 2 .…”