Patent ID: 6549058
Filing Date: 2003-04-15
Classification: G06J

Abstract:
A circuit for generating a signal representing the division of first and second analog voltage signals comprising:a first sample and hold circuit with an input receiving the first analog voltage signal and an output; a second sample and hold circuit with an input receiving the second analog voltage signal and an output; a voltage to current converter having an input connected to the output of said first sample and hold circuit and generating an output current signal corresponding to the first analog voltage signal; a capacitor connected to the voltage to current converter whereby said output current signal charges said capacitor; a comparator having a first input connected to said capacitor and a second input connected to said output of said second sample and hold circuit and generating an output signal having a time interval representing the division of the first and second analog voltage signal; and means connected to said capacitor for discharging said capacitor with each cycle of sampling of the first and second sample and hold circuits.