Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Reexamination Certificate
2008-06-24
2009-06-23
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
C327S538000, C327S362000, C320S136000, C320S134000
Reexamination Certificate
active
07551003
ABSTRACT:
A current mirror circuit includes a pair of first and second transistors having bases connected together and emitters connected to a power line, a resistor connected between the bases of the first and second transistors and the power line, a third transistor for providing base currents of the first and second transistors and a resistor current flowing through the resistor, and a current compensation circuit that adds a compensation current to an input current to the first transistor. The amount of the compensation current is approximately equal to that of the resistor current divided by a current gain of the third transistor. Thus, the compensation current compensates the difference between a collector current of the first transistor and the input current.
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Office Action issued on Jun. 30, 2008 in corresponding U.S. Appl. No. 11/498,069.
Office Action dated Oct. 14, 2008 in corresponding Japanese patent application No. 2005-228094 (and English translation).
Office Action issued Jul. 24, 2008 in corresponding Japanese patent application No. 2005-228094 (and English translation).
Denso Corporation
Le Dinh T.
Posz Law Group , PLC
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