Systems and methods for peak detection in automatic gain control circuits in high-speed wireline communications

摘要

Methods and systems for peak detection as part of automatic gain control in high-speed communications are provided. A peak detection system uses a portion of an input signal to generate a reference signal for comparison with the input signal. The comparison produces a differential error signal that is in turn used to produce one or more full swing pulses based on the comparison. A pulse counter counts the pulses, and if the count in a single clock cycle is above a determined threshold, a binary error signal is set to indicate a need for correction.

主权项

1. A system for peak detection in high-speed wireline communications, the system comprising:
a reference generator configured to generate a reference signal; an error amplifier coupled to an output of the reference generator to receive the reference signal, the error amplifier also receiving an input signal; an operational amplifier coupled to the error amplifier, the operational amplifier configured to generate one or more pulses based on a comparison of the reference signal and the input signal; and a pulse counter coupled to an output of the operational amplifier, the pulse counter counting the one or more pulses received in an operational clock cycle of the pulse counter.