π-PEAKING SHUNT-FEEDBACK TRANSIMPEDANCE AMPLIFIER WITH BANDWIDTH ENHANCEMENT
This paper presents the development of a bandwidth enhancement technique for a resistive shunt-feedback transimpedance amplifier (TIA). The technique relies upon a π-peaking network realization using the shunt-feedback TIA as a part of the network in order to achieve a high bandwidth while maintaining a low noise performance. The output is obtained by making use of subsequent amplifier stages with the non-uniform constant-k output network for simultaneously high gain and bandwidth. Practical performance verification was provided via the designs and simulations of two π-peaking TIAs in a silicon CMOS implementation and a discrete HJFET implementation. Simulated results clearly indicates superior bandwidth of the π-peaking TIA over the conventional shunt-feedback TIA at practically no cost to circuit complexity and power consumption.