Hysteresis Circuit

摘要

A hysteresis circuit includes a current comparator arranged to receive an input current signal. A reference current source is coupled to the current comparator and arranged to provide a reference current. A hysteresis current source is arranged to provide a hysteresis current. A switch is coupled between the reference current source and the hysteresis current source. At least one buffer is coupled to the current comparator and arranged to provide an output voltage signal. The output voltage signal has a first voltage if the input current signal is greater than a sum of the reference current and the hysteresis current and the output voltage signal has a second voltage if the input current signal is less than the reference current.

主权项

1. A hysteresis circuit, comprising:
a current comparator having a first input coupled to an input current signal; a reference current source coupled to a second input of the current comparator; a hysteresis current source; a switch coupled between the reference current source and the hysteresis current source; and at least one buffer coupled to an output of the current comparator; wherein the buffer provides an output voltage signal that has a first voltage if the input current signal is greater than a sum of a reference current from the reference current source and a hysteresis current from the hysteresis current source, and the output voltage signal has a second voltage, different from the first voltage, if the input current signal is less than the reference current.