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US 2007/0164721 A1Published application
Regulated internal power supply and method
AssigneeMicron Technology, Inc.
InventorKang Han
Life of this patent
Estimating the term…
Abstract
A regulated internal power supply and method are provided. According to various embodiments, a regulated internal power supply system includes a DC to DC converter adapted to connect to an external supply voltage. The converter is further adapted to increase voltage level above a level of the external supply voltage. A low pass filter is connected to the DC to DC converter, and a current-mode bandgap voltage reference (BVR) is connected to the low pass filter. The BVR is adapted to provide second order curvature correction and to provide a tunable voltage reference gradient with respect to the external supply voltage. A power amplifier is connected to the BVR and to a circuit die, to provide a stable internal supply voltage to the die. Other aspects and embodiments are provided herein.
Claims30
A system, comprising:
- a DC to DC converter adapted to connect to an external power supply, the converter further adapted to increase voltage level above a level of the external supply voltage;
- a low pass filter connected to the DC to DC converter;
- and
- a voltage reference circuit adapted to connect the low pass filter to a power amplifier to provide an internal supply voltage to a circuit die, the voltage reference circuit including:
- a temperature curvature compensating circuit adapted to provide second order curvature correction by summing two currents in the circuit that are of opposite dependencies on temperature;
- at least one variable resistor to provide a tunable voltage reference magnitude level;
- and
- at least one pair of current mirrors with same aspect ratios but different channel lengths to provide a tunable voltage reference gradient with respect to the external power supply.
5 more elements
A system, comprising:
- a DC to DC converter adapted to connect to an external supply voltage, the converter further adapted to increase voltage level above a level of the external supply voltage;
- a low pass filter connected to the DC to DC converter;
- a current-mode bandgap voltage reference (BVR) connected to the low pass filter, the BVR adapted to provide second order curvature correction and to provide a tunable voltage reference gradient with respect to the external supply voltage;
- and
- a power amplifier connected to the BVR and to a circuit die, the power amplifier adapted to provide a stable internal supply voltage to the die.
2 more elements
A method, comprising:
- receiving a voltage signal having a first potential from an external supply;
- increasing the voltage signal to a second potential using a DC to DC converter, wherein the second potential is greater than the first potential;
- removing high frequency components from the voltage signal;
- providing a voltage reference to at least one power amplifier, the voltage reference having a tunable gradient with respect to the first voltage level using a current-mode bandgap voltage reference (BVR), the BVR having the voltage signal as an input;
- and
- providing a stable internal supply voltage to a circuit die connected to the at least one power amplifier.
3 more elements
A method of forming a power supply, comprising:
- forming a DC to DC converter adapted to connect to an external supply voltage, the converter further adapted to increase voltage level above a level of the external supply voltage;
- forming a low pass filter connected to the DC to DC converter;
- forming a current-mode bandgap voltage reference (BVR) connected to the low pass filter, the BVR adapted to provide second order curvature correction and to provide a tunable voltage reference gradient with respect to the external supply voltage;
- and
- forming a power amplifier connected to the BVR and to a circuit die, the power amplifier adapted to provide a stable internal supply voltage to the die.
2 more elements
A semiconductor die, comprising:
- a substrate;
- an integrated circuit formed on the substrate;
- and
- a power supply formed on the substrate and adapted to supply current to the integrated circuit, the power supply including:
- a DC to DC converter adapted to connect to an external supply voltage, the converter further adapted to increase voltage level above a level of the external supply voltage;
- a low pass filter connected to the DC to DC converter;
- a current-mode bandgap voltage reference (BVR) connected to the low pass filter, the BVR adapted to provide second order curvature correction and to provide a tunable voltage reference gradient with respect to the external supply voltage;
- and
- a power amplifier connected to the BVR and to the integrated circuit, the power amplifier adapted to provide a stable internal supply voltage to the integrated circuit.
6 more elements
An electronic system, comprising:
- a processor;
- a memory system coupled to the processor, the memory system including:
- at least one memory circuit;
- and
- a power supply adapted to supply current to the memory circuit, the power supply including:
- a DC to DC converter adapted to connect to an external supply voltage, the converter further adapted to increase voltage level above a level of the external supply voltage;
- a low pass filter connected to the DC to DC converter;
- a current-mode bandgap voltage reference (BVR) connected to the low pass filter, the BVR adapted to provide second order curvature correction and to provide a tunable voltage reference gradient with respect to the external supply voltage;
- and
- a power amplifier connected to the BVR and to the memory circuit, the power amplifier adapted to provide a stable internal supply voltage to the memory circuit.
7 more elements
Dependencies are inferred from the claim text.