DC-COUPLED RECEIVER FOR SHARED OPTICAL SYSTEM

摘要

A dc-coupled receiver for a shared optical system includes an input feedback amplifier circuit (16) which establishes a dc reference baseline voltage level for incoming packets of data. A pair of sample-and-hold circuits (18, 20) are connected in parallel to receive and sample signals from the feedback amplifier circuit when no data is being transmitted and at the initial edge of incoming packets of data. A voltage divider circuit (42) receiving signals from the sample-and-hold circuits establishes a dc slicing level for each incoming packets of data. An output feedback circuit (28) can be added to compensate for offset error without affecting the performance of the sample-and-hold circuitry.