Current drive circuit reducing V DS dependency

Details Current drive circuit reducing V DS dependency Current drive circuit reducing V DS dependency

2008-05-13

2008-05-13

Zweizig, Jeffrey (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

Reexamination Certificate

active

07372322

ABSTRACT:
A first transistor is provided in a first route and a second transistor is provided in a second route, the first route and the second route constituting a current mirror circuit. The sources of the transistors are grounded. In order to match VDSof the first transistor and that of the second transistor match each other, there are provided an operational amplifier receiving the drain voltages of the transistors, and a third transistor having a gate thereof connected to the output of the operational amplifier. The third transistor is provided in the first route. As a result, the current fed to the third transistor is controlled so that VDSof the first transistor and that of the second transistor match each other.

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patent: 2001-175343 (2001-06-01), None

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