Design of Low Power Inverter Based Multilevel Feedback Transimpedance Amplifier for Low Power Applications
Priya Singh, Vandana Niranjan and Ashwni Kumar
High speed, wide band and low power data communication schemes are in marvelous demand in today’s smart world of IoTs. Design of wide band and low power amplifiers is desired in order to fulfill these requirements various systems such as communication , optical etc. Transimpedance amplifier is among one of such major components for optical receivers. Nowadays VLSI technology face major challenge in low power and wide band application due to minimization. Considering this, a wide band multi level feedback topology in inverter based local feedback transimpedance amplifier has been proposed here. The proposed transimpedance amplifier have multilevel feedback topology i.e. overall feedback stage in together with local feedback stage . The inverter based feedback topology facilitated with all the time on PMOS device and NMOS device helps in reduction of the leakage current for miniature applications. The proposed design shows the transimpedance gain of around 52.5 dBΩ at 17.5 GHz with an average input referred noise current of approximately 46.2 pA/√Hz. In addition to this, the proposed circuit consumes very less power of around 4.7 mW making the design suitable for low power optical communication.
Keywords: Transimpedance Amplifier (TIA), multilevel feedback, small signal model, bandwidth, bandwidth, transimpedance gain