BALANCED DIFFERENTIAL TRANSIMPEDANCE AMPLIFIER WITH SINGLE ENDED INPUT AND BALANCING METHOD

摘要

A balanced differential transimpedance amplifier with a single-ended input operational over a wide variation in the dynamic range of input signals. A threshold circuit is employed to either or a combination of (1) generate a varying decision threshold to ensure a proper slicing over a wide range of input current signal levels; and (2) generate a bias current and voltage applied to an input of a transimpedance stage to cancel out a dependence of the transimpedance stage voltage input on input current signal levels.

主权项

1. A balanced differential transimpedance amplifier with single ended input comprising:
a) a differential transimpedance stage, the differential transimpedance stage further comprising a first input and a second input; b) an input current buffer stage, wherein an output of the input current buffer stage is coupled to the first input of the transimpedance stage; and c) a threshold circuit for generating a threshold voltage for balancing the differential transimpedance stage, wherein an output of the threshold circuit is coupled to the second input of the transimpedance stage.