Amplifiers – Signal feedback – Current and voltage feedback
Reexamination Certificate
2006-05-30
2006-05-30
Mottola, Steven J. (Department: 2817)
Amplifiers
Signal feedback
Current and voltage feedback
C330S103000, C381S096000
Reexamination Certificate
active
07053705
ABSTRACT:
A method and system for providing a mixed-mode (current- and voltage-source) audio amplifier is disclosed. The mixed-mode amplifier includes a voltage sensing feedback path including a first network comprising at least one circuit; and a current sensing feedback path including a second network comprising at least one circuit. According to the method and system disclosed herein, the first and second networks vary an output impedance or transconductance of the amplifier as a function of frequency of the input voltage signal, such that at a first frequency range, the amplifier operates substantially as a current amplifier, and at a second frequency range, the amplifier operates substantially as a voltage amplifier, thereby inheriting distortion reduction of the current amplifier and stability of the voltage amplifier.
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Comparetto Joseph
Hench John J.
Gallagher & Lathrop
Lathrop, Esq. David N.
Mottola Steven J.
Tymphany Corporation
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