Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Converting input voltage to output current or vice versa
Reexamination Certificate
2011-05-17
2011-05-17
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Converting input voltage to output current or vice versa
C327S108000
Reexamination Certificate
active
07944249
ABSTRACT:
A buffer circuit includes a first transistor (T1) having a base connected to a first power supply, the emitter (E1) and collector (C1) connected as input and output nodes, a second transistor (T2) having a base connected to the first power supply, a first constant current circuit using a difference between outgoing current from E1and an input current at the current signal input node as a constant current, and determining outgoing current from the emitter of T2equal to the constant current; and a first mirror circuit equalizing first and second collector currents with a third transistor (T3) with C1and a fourth transistor (T4) with a collector connected to a collector of T2, a first operating point voltage is provided to the current signal output node between T3and T1, and a second operating point voltage based on the first operating point voltage between T4and T2.
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Imai Hitoshi
Yanagi Hidenobu
Donovan Lincoln
Jager Ryan C
Renesas Electronics Corporation
Young & Thompson
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