When light strikes the photodiode’s active region, current flows from cathode to anode. Ideally, this entire photocurrent ...

A simple architecture for a configurable op-amp or differential difference amplifier (DDA) is presented. The circuitry can be configured as an input/output rail to rail high-speed op-amp, or as a DDA.

This paper describes a 1-V wide-input range and high linearity transconductance input stage that uses poly resistor and input-impedance boosting technique. Using the proposed transconductor, an op amp ...