Amplifiers – With semiconductor amplifying device – Including class d amplifier
Reexamination Certificate
2006-12-19
2006-12-19
Nguyen, Patricia (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including class d amplifier
C330S20700P, C330S010000
Reexamination Certificate
active
07151406
ABSTRACT:
A method of operating a class D amplifier output stage that compensates for nonlinearity introduced by a residual load current during the dead time in the switching of the output stage. The amplifier output stage includes an input, a gate driver circuit, two output transistors, an output, and a current sensing circuit. The transistors are serially connected between the terminals of a power supply. A residual load current flows through the transistors when they are switched off. The gate driver circuit increases or decreases the duty cycles of signals driving the transistors based on the direction of the residual load current flowing through the transistors, thereby causing the duty cycle of the amplifier output to remain substantially constant and equal to the duty cycle of the amplifier input.
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The Class-D Amplifier, (From the book Introduction to Electroacoustics and Audio Amplifier Design, Second Edition—Revised Printing, by W.Marshall Leach, Jr., published by Kendall/Hunt, © 2001.
Integrated Current Sensing Circuit Techniques for DC-DC Converters, Hassan Pooya Forghani-zadeh, Advisor: Prof. Gabriel Rincon-Mora, Georgia Tech Analog—Mar. 22, 2002 Review.
Brady III W. James
Nguyen Patricia
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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