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Title
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مقاله چاپ شده با عنوان Employing bias current feedback in MIC transimpedance amplifier to increase bandwidth
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Type
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JournalPaper
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Keywords
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bias feedback, immittance converter, optical receiver, regulated cascode, transimpedance amplifier
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Abstract
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This paper presents an inductorless transimpedance amplifier (TIA) that employs bias feedback technique in a MOS-based immittance converter (MIC) to achieve high bandwidth. The bias feedback technique is analyzed and explored as a supplementary approach to reduce the input impedance in a current buffer structure. Employing this technique in a MIC-based TIA structure provides an additional degree of freedom for the design and helps reduce the trade-off between bandwidth and power. The proposed structure is designed and simulated in 0.18 μm CMOS technology considering a 1 pF photodiode capacitance. The post-layout simulation results show that the TIA provides a transimpedance gain of 50.9 dBΩ, a bandwidth of 6.1 GHz, and an inputreferred current noise of 9.9 pA/√Hz. The circuit consumes 3.42 mW from a 1.8 V supply and occupies 0.0046 μm2 area. Results are compared with TIAs reported in the literature, which confirms the effectiveness of the proposed modified MIC structure.
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Researchers
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sara behnazar (Second Researcher), zahra sohrabi (First Researcher)
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