CMOS operational transresistance amplifier for analog signal processing

A new CMOS realization of the Operational Transresistance Amplifier (OTRA) is introduced. The properties of the OTRA are shown to be suitable for VLSI applications employing MOS transistors operating in the ohmic region. Appl ications of the OTRA in realizing voltage amplifiers, multipliers, integrat ors, continuous time filters and a quadrature oscillator are presented. Vol tage mode filters that benefit from the current processing capabilities at the input terminals of the OTRA are presented. A detailed analysis taking t he effect of the finite transresistance gain into consideration is provided . Both passive compensation and self-compensation of the proposed circuits are presented. The effectiveness of the proposed circuits is demonstrated t hrough PSpice simulations based on the AMI 1.2 mu m N-well level 3 paramete rs. (C) 1999 Elsevier Science Ltd. All rights reserved.