ELECTRONIC DEVICE FOR A RADIOFREQUENCY SIGNAL RECEPTION CHAIN, COMPRISING A LOW-NOISE TRANSIMPEDANCE AMPLIFIER STAGE

摘要

An electronic device includes a transimpedance amplifier stage having an amplifier end stage of the class AB type and a preamplifier stage coupled between an output of a frequency transposition stage and an input of the amplifier end stage. A self-biased common-mode control stage is configured to bias the preamplifier stage. The preamplifier stage is formed by a differential amplifier with an active load that is biased in response to the self-biased common-mode control stage.

主权项

1. A transimpedance amplifier circuit, comprising
an amplifier end stage, a preamplifier stage coupled between a transimpedance amplifier input and an input of the amplifier end stage, said preamplifier stage comprising:
first bipolar transistors; andan active load; and a self-biased common-mode control stage configured to bias the preamplifier stage.