Inverse voltage-to-current conversion circuit

Abstract

An inverse voltage-to-current conversion circuit for providing a current that is inversely related to an input voltage of a protected device is disclosed. A first input terminal for receiving a first input voltage signal and a second input terminal for receiving a second input voltage signal. A voltage-to-time converter circuit provides a time indicator pulse signal with a pulse width related to inverse of a difference between the first and second input voltage signals. A time-to-voltage converter circuit provides a voltage indicator signal having a magnitude based on the pulse width of the time indicator pulse signal. A voltage-to-current converter circuit provides a current indicator signal having a magnitude proportional to the voltage indicator signal and inversely related to the difference between the first and second input voltage signals.

Dependencies are inferred from the claim text.