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US08878510B2 Reducing power consumption in a voltage regulator 有权
降低电压调节器的功耗

Reducing power consumption in a voltage regulator
摘要:
A voltage regulator includes an amplifier, a first buffer and a second buffer. The amplifier is designed to generate an error voltage between a reference voltage and a voltage at an output node of the voltage regulator. The first buffer is coupled to receive the amplified error voltage and, in response, to drive a first pass transistor. The first buffer includes a non-linear resistance element. The resistance of the non-linear resistance element varies non-linearly with a load current drawn from the output node. The second buffer is coupled to receive the amplified error voltage, and in response, to drive a second pass transistor. The second buffer includes a linear resistance element. The resistance of the linear element is a constant. The use of the non-linear resistance element enables reduction in power consumption in the voltage regulator.
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