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US 7,994,864 B2Granted
Audio out unit
AssigneeMediatek Inc.
InventorsHung-I Chen, Yen-Hsun Hsu, Sung-Han Wen, Wei-Cheng Tang
Life of this patent
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Abstract
A DC-coupled audio out unit is provided, including at least one regulator and at least one audio amplifier. The regulator is coupled to at least one power terminal of the audio amplifier.
Claims17
A DC-coupled audio out unit, comprising:
- a first regulator for receiving a power source voltage to provide a positive power voltage;
- a third regulator for receiving the power source voltage to provide an intermediate voltage;
- and
- a second regulator for receiving the intermediate voltage to provide a negative power voltage;
- and
- at least one audio amplifier for receiving the positive power voltage and the negative power voltage, and amplifying at least one input signal to generate an audio output signal to an audio load.
3 more elements
A DC-coupled audio out unit, comprising:
- a first regulator for receiving a first supplied voltage to provide a control voltage;
- at least one voltage drive circuit, supplied by a power source voltage, arranged to generate a positive power voltage according to the control voltage;
- a second regulator for receiving an intermediate voltage to provide a negative power voltage;
- and
- at least one audio amplifier for receiving the positive power voltage and the negative power voltage, and amplifying at least one input signal to generate an audio output signal to an audio load.
2 more elements
A DC-coupled audio out unit, comprising:
- a first regulator for receiving a first supplied voltage to provide a first control voltage;
- at least one first voltage drive circuit, supplied by a power source voltage, arranged to generate a positive power voltage according to the first control voltage;
- a second regulator for receiving an second supplied voltage to provide a second control voltage;
- at least one second voltage drive circuit, supplied by a third supplied voltage, arranged to generate a negative power voltage according to the second control voltage;
- and
- at least one audio amplifier for receiving the positive power voltage and the negative power voltage, and amplifying at least one input signal to generate an audio output signal to an audio load.
3 more elements
Dependencies are inferred from the claim text.