Mos comparator circuit

Details Mos comparator circuit Mos comparator circuit

G - Physics

05

B

328/167

G05B 1/02 (2006.01) G01R 19/00 (2006.01) H03K 5/24 (2006.01)

Patent

CA 1177912

50.3954 MOS COMPARATOR CIRCUIT ABSTRACT A circuit for detecting a difference in the relative magnitudes of two voltages includes a current sensing circuit connected between the first voltage and ground to thereby cause a first current to flow in the current sensing circuit, an amplifier connected between the second voltage and ground and connected to the current sensing circuit to thereby cause a second current to flow, the second current being equal to the first current when the first voltage is equal to the second voltage, and a variable impedance inverter connected to the first voltage and connected to the amplifier, the variable impedance being controlled by the first voltage, the output of the inverter thereby being related to the difference between the first voltage and the second voltage. The invention is particularly useful for controlling a battery backup power supply in a microprocessor having a volatile memory and for creating precision delay circuits.

382418

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