US 10,594,285 B1 · Signal detector

Abstract

A signal detector includes an input to receive a differential signal, a generator to generate a first voltage based on the differential signal and a second voltage based on the first voltage and a predetermined voltage, and an output stage to output a detection signal based on the first voltage and the second voltage. The differential signal includes a first signal and a second signal. The detection signal has a first value when a difference between the first and second signals is in a first range and a second value when the difference between the first and second signals is in a second range. The detection signal may indicate the presence or absence of low frequency periodic signaling for the differential signal. Such a detector may demonstrate fast response and operate at low-current.

Claims20

Dependent claims

A signal detector, comprising:

a rectifier configured to generate a first current based on an input signal;
a first circuit configured to generate a second current based on a first reference signal;
a second circuit configured to generate a third current based on a common mode voltage of the input signal;
a reference signal generator configured to generate a fourth current based on a second reference signal and a third reference signal;
and
a comparator configured to generate a detection signal based on the first current, the second current, the third current, and the fourth current.

3 more elements

Dependencies are inferred from the claim text.

Signal detector

Life of this patent

Signal detector

Life of this patent

Abstract

Claims20