Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Reexamination Certificate
2007-06-13
2009-06-30
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
C330S261000, C330S260000, C327S142000
Reexamination Certificate
active
07554376
ABSTRACT:
An offset correcting circuit includes: an amplifying unit including an offset adjusting unit that adjusts an offset of the amplifying unit; and an offset determining unit that that detects the offset of the amplifying unit outputs a signal for correcting the offset of the amplifying unit. The offset determining unit includes a comparing unit that compares an output of the amplifying unit with a reference value, and a counter that increases or decreases a count value in response to an output of the comparing unit. The offset adjusting unit adjusts the offset based on the count value and includes a bias varying portion for varying a bias of the amplifying unit based on the output of the counter.
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Le Dinh T.
Pillsbury Winthrop Shaw & Pittman LLP
Yamaha Corporation
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