Voltage comparator requiring no compensating offset voltage

Details Voltage comparator requiring no compensating offset voltage Voltage comparator requiring no compensating offset voltage

H - Electricity

03

K

H03K 17/22 (2006.01) H03F 3/00 (2006.01) H03K 5/24 (2006.01)

Patent

CA 2172568

A method and apparatus is provided for comparing a first input voltage to a second input voltage. In one embodiment of the invention, a first input voltage is transformed into a first current flowing through a first transistor and a second transistor. A second input voltage is transformed into a second current flowing through the first transistor while the first current continues flowing through the second transistor. A difference current is developed which represents the difference between the first current and the second current. An indicator signal is generated which indicates the larger of the first and second input voltages based on the value of the difference current.

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