Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of the amplifier
Reexamination Certificate
2007-10-30
2007-10-30
Korzuch, William (Department: 2627)
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of the amplifier
C360S046000, C330S085000
Reexamination Certificate
active
11652183
ABSTRACT:
An amplifier system with feedback current cancellation comprises an amplifier having at least one stage, a feedback network, first and second replica circuits, first and second unity-gain buffers, a second resistance, and a current mirror. The feedback network includes a first resistance that communicates with an input and an output of the amplifier. The first and second replica circuits approximately replicate the DC characteristics of the output and the input of the amplifier, respectively. Inputs of the first and second buffers communicate with the first and second replica circuits, respectively. The second resistance communicates with outputs of the first and second buffers. The current mirror provides a current at the input of the amplifier that is proportional to a second current flowing through the second resistance.
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Korzuch William
Marvell International Ltd.
Negrón Daniell L.
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