CMOS amplifier module allowing for voltage, current, transimpedance and transadmittance transfer functions implementations

This article presents a universal amplifier module (UAM), implemented in 180 nm CMOS technology, that can be configured to function as a (i) voltage controlled voltage source (VCVS), (ii) current controlled current source (CCCS), (iii) voltage controlled current source (VCCS), (iv) current controlled voltage source (CCVS), and (v) current conveyor (type II). As a result, the amplifier can be used to produce four kinds of basic circuit transfer functions, i.e., voltage-, current-, transadmittance- and transimpedance- transfer functions. This is validated by presenting simulation results for a second order voltage, current, transadmittance and transimpedance band-pass filter (BPF) transfer functions using only three UAM devices. The device is expected to be useful in a complex VLSI system environment where interfacing between sub-systems with varied impedance levels is required.