Amplifiers – With semiconductor amplifying device – Including particular power supply circuitry
Reexamination Certificate
2006-06-13
2006-06-13
Choe, Henry (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including particular power supply circuitry
C330S296000
Reexamination Certificate
active
07061327
ABSTRACT:
A headphone driver amplifier operative from a single DC voltage supply, coupled directly to the headphone speakers without the need for DC coupling capacitors used for preventing DC reaching the headphones. An onboard power supply generates a negative voltage rail which powers the output amplifiers, allowing driver amplifier operation from both positive and negative rails. Since the amplifiers can be biased at ground potential (0 volts), no significant DC voltage exists across the speaker load and the need for DC coupling capacitors is eliminated.
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Choe Henry
Maxim Integrated Products Inc.
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