Patent ID: 9742219
Date: 2017-08-22
CPC Classifications: G01R,H02J,H02M,H02N,H03K

Claim:
1. A circuit for comparing a voltage with a threshold, comprising: first and second nodes of application of said voltage; a first branch comprising a first transistor coupled in series with a first resistor between the first and second nodes; a second branch parallel to the first branch, comprising second and third resistors coupled in series forming a voltage dividing bridge between the first and second nodes, the midpoint of the dividing bridge being coupled to a control node of the first transistor; and a third branch comprising: a second transistor having its conduction nodes respectively coupled to the first or second node and to a third node, and having a control node coupled to the junction point of the first transistor and of the first resistor; and a resistor or a capacitor or a series or parallel association of a resistor and of a capacitor, having its ends respectively coupled to the third node and to the control node of the first transistor.