VOLTAGE REGULATOR STABILIZATION FOR OPERATION WITH A WIDE RANGE OF OUTPUT CAPACITANCES
First Claim
1. A voltage regulator comprising:
- a measurement circuit for generating a value representing a magnitude of an output capacitance connected at an output node of the voltage regulator; and
a correction circuit for modifying, based on the value, a compensation circuit internal to the voltage regulator.
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Accused Products
Abstract
A voltage regulator includes a measurement circuit for obtaining a value representing a magnitude of an output capacitance connected at an output node of the voltage regulator. A correction circuit in the voltage regulator modifies a compensation circuit internal to the voltage regulator based on the value. The modification of the compensation circuit is done to ensure that sufficient stability margins to accommodate the output capacitance are ensured for the main feedback loop in the voltage regulator. In an embodiment, a voltage proportional to the output capacitance is detected at start-up of the voltage regulator, and a corresponding binary signal is generated. The logic value of the binary signal is used to add or remove components and/or circuit portions in the compensation circuit to ensure stability. The voltage regulator is thus designed to support a wide range of output capacitance values.
58 Citations
17 Claims
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1. A voltage regulator comprising:
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a measurement circuit for generating a value representing a magnitude of an output capacitance connected at an output node of the voltage regulator; and a correction circuit for modifying, based on the value, a compensation circuit internal to the voltage regulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system comprising:
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an antenna to receive a signal on a wireless medium; an analog processor to process the signal and to generate a processed signal; an analog to digital converter (ADC) to receive the processed signal as input and to generate a plurality of digital values representing the processed signal; a processor to process the plurality of digital values; and a voltage regulator to receive power from a battery, and provide a regulated output voltage for the operation of each of the analog processor, ADC, and the processor, wherein, the voltage regulator comprises; a measurement circuit for generating a value representing a magnitude of an output capacitance connected at an output node of the voltage regulator; and a correction circuit for modifying, based on the value, a compensation circuit internal to the voltage regulator. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification