Patent ID: 7116134

Claim:
A voltage comparator for comparing an input voltage with a reference voltage, said voltage comparator comprising: comparing means (T 1 to T 10 ), and clock-signal controlled switching means (S1to S 4 ) connected to said comparing means for energizing the comparing means upon a transition of a clock-signal, determining means (M 1 , M 2 , X, M 3 , V) for determining a completion of a comparison and for controlling the clock-signal controlled switching means (S 1 to S 4 ) for de-energizing the comparing means when the completion of a comparison is determined, and a voltage divider (D) for dividing the input voltage to be compared, the clock-signal controlled switching means comprising a switch (S 8 ) connected in series with the voltage divider (D) for inhibiting a flow of current through the voltage divider when the comparison means is de-energized wherein said clock-signal controlled switching means comprising a Schmitt Trigger (M 4 ) having an input which is controlled by a signal that controls said switch (S 8 ) connected in series with the voltage divider, and having an output controls the energizing and de-energizing of the comparing means.