Design and Simulation of Wideband, Low-Power Inverter-Based Local Feedback Trans-Impedance Amplifier Using Negative Capacitance Technique

In today’s smart emerging world, demand of efficient communication system is escalating. A superior communication system needs a better transmission and reception on its both ends. On the receiver side, the trans-impedance amplifier (TIA) plays a major role during data acquisition stage. For better communication, TIA having a good gain and large bandwidth is required along with lower power consumption. In this chapter, the authors have proposed an improved trans-impedance amplifier with 10 Gb/s usage. The performance of TIA has been improved using an inverter-based local feedback method. The main edge of this approach is the optimized impedance at input side by the feedback which ultimately leads to an increase in the proposed TIA gain. Furthermore, the local feedback topology results in the improved bandwidth of TIA. The proposed TIA gain was obtained as to be 61 dBb-Ω along with the increased bandwidth of 8.5 GHz. The proposed trans-impedance amplifier works suitably at 1.8 V of the supply voltage. The overall power consumption of the amplifier was found to be 4.2 mW. The noise spectral density for the proposed TIA was obtained as 26.4 (pA/(√Hz)). Consequently, the proposed architecture is found to be suitable for high gain, low noise, and wideband applications. The schematic is made using 180 nm CMOS technology and results are verified using Cadence Spectre Tool.