Cadence Design Systems, Inc.

Santiago Luis Bortman

Eric Harris Naviasky

Guillaume Fortin

Mathieu Gagnon

Julien Faucher

A system and a method for detecting a low-frequency periodic signal (LFPS) include at least one comparator performing a threshold comparison on an analog input signal over a period of time. A sampling circuit generates digital signals by sampling an output of the at least one comparator. A digital detection circuit applies a set of detection rules to the digital signals. The detection rules are configured to detect a presence or an absence of an LFPS based on predefined criteria concerning characteristics of the digital signals.

Low-frequency periodic signal detector

A full wave rectifier () for use as part a differential signal detector () detects both high and low envelopes of differential signals (RX, RX) at a pair of differential inputs () and provides a sense signal (V) at an output () thereof. The differential signal detector () includes both the full wave rectifier () and a voltage reference source () having a circuit architecture in common, and a comparator for comparing the sense signal (V) with a reference voltage (V. The circuit configuration of both the full wave rectifier () and the voltage reference source () include first and second differential input circuits (andand) each including a pair of field effect transistors (andand) of different conductivity type having respective source terminals () coupled together.

Growing community of inventors

Chevy Chase, MD, United States of America

Santiago Luis Bortman