A low power wideband RGC-based modified-MIC trans-impedance amplifier in 0.18 ​μm CMOS process. (February 2020)

• Record Type: Journal Article
• Authors: Hosseini, Maryam; Jafarnejad, Roya; Sobhi, Jafar; Koozehkanani, Ziaaddin Daie
• Is Part Of: Microelectronics journal. Volume 96(2020)
• Publication Date: 2020-02
• Subjects: Optical receiver -- Trans-impedance amplifier -- Ultra-wideband -- MOS-based immittance converter -- Regulated cascade; Microelectronics -- Periodicals; Microélectronique -- Périodiques; Microelectronics; Electronic journals; Journals - contents and abstracts; Periodicals; 621.3805
• DOI: 10.1016/j.mejo.2019.104682
• Languages: English
• ISSNs: 0959-8324

Abstract

Abstract: This paper presents a novel Trans-Impedance Amplifier (TIA) based on Regulated-Cascode (RGC) structure. A modified MOS-based Immittance Converter (MIC) is used to achieve high bandwidth with lower power consumption. Combining the MIC scheme with RGC structure, in the presence of an inductor, provides both a negative input resistance which increases the input pole frequency and a negative inductance which improves stability of the circuit. As a result, -3 ​dB bandwidth enhances while consuming lower power. Post-layout simulation results in TSMC 0.18 ​μm CMOS technology show a trans-impedance gain of 49.7 ​dB with -3dB bandwidth of 9.2 ​GHz considering 500 ​fF of photodiode capacitance at the TIA input. The circuit occupies an active area of 0.068 ​mm 2 and consumes 5.3 ​mW from a 1.8-V supply. The minimum input-referred current noise of the TIA is about 15.3 pA/√Hz.