VOLTAGE REGULATOR HAVING AN INVERSE ADAPTIVE CONTROLLER
First Claim
1. Voltage regulator having an inverse adaptive controller comprising;
- a first power supply terminal and a second power supply terminal;
a reference voltage generator to provide a reference voltage;
a output buffer generating regulated voltage controlled by an error amplifier;
a voltage divider to provide a feedback voltage; and
a voltage regulator having a voltage controlled current feedback connected to said reference voltage generator and said error amplifier;
wherein said voltage controlled current feedback decreases a feedback current inversely with regard to an increment of the said first supply voltage to decrease the reference voltage.
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Accused Products
Abstract
A low drop-out (LDO) voltage regulator that has high a PSRR (Power Supply Ripple Rejection) performance and a high load regulation with low current consumption is disclosed. The voltage regulator doses not require any high gain error amplifier that may cause instability in the voltage regulator. A novel voltage-controlled current-feedback is presented that generates an inverse phase signal and compensation voltage for a ripple noise and dropout voltage, respectively. The voltage-controlled current-feedback generates a negative voltage slope with regard to the power supply voltage, which can cancel the ripple noise at the output terminal. The current-feedback creates a positive coefficient voltage with regard to the load current, which compensates the voltage drop caused by parasitic resistances.
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Citations
2 Claims
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1. Voltage regulator having an inverse adaptive controller comprising;
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a first power supply terminal and a second power supply terminal;
a reference voltage generator to provide a reference voltage;
a output buffer generating regulated voltage controlled by an error amplifier;
a voltage divider to provide a feedback voltage; and
a voltage regulator having a voltage controlled current feedback connected to said reference voltage generator and said error amplifier;
wherein said voltage controlled current feedback decreases a feedback current inversely with regard to an increment of the said first supply voltage to decrease the reference voltage.
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2. Voltage regulator having a inverse adaptive controller comprising;
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a first power supply terminal and a second power supply terminal;
a reference voltage generator to provide a reference voltage;
a output buffer generating regulated voltage controlled by an error amplifier;
a voltage divider to provide a feedback voltage; and
a voltage regulator having a voltage controlled current feedback connected to said reference voltage generator and said error amplifier;
wherein said voltage controlled current feedback decreases a feedback current with regard to a decrement of the load current of said output buffer to increase the reference voltage.
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Specification