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MINIMAL AREA, POWER EFFICIENT, HIGH SWING AND MONOLITIHIC GROUND CENTERED HEADPHONE AMPLIFIER CIRCUIT OPERABLE ON A LOW VOLTAGE
MINIMAL AREA, POWER EFFICIENT, HIGH SWING AND MONOLITIHIC GROUND CENTERED HEADPHONE AMPLIFIER CIRCUIT OPERABLE ON A LOW VOLTAGE
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机译:最小面积,功率效率高,高摆幅且可在低电压下操作的单芯接地式耳机放大器电路
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摘要
A minimal area, power efficient, high swing and monolitihic ground centered headphone amplifier circuit operable on a low voltage. An input amplifier stage includes a first input terminal and a second input terminal and having a first gain. An output amplifier stage is coupled to an output of the input amplifier stage to provide an output signal and having a second gain. A feedback network coupled between the first input terminal and the output of the output amplifier stage. A level shifting unit coupled to the first input terminal and the feedback network. A charge pump coupled to the output amplifier stage to generate a negative supply voltage and to minimize a noise associated with the negative supply voltage using a loop gain of the amplifier, wherein the loop gain is a combination of the first gain, the second gain, and a gain of the feedback network.
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