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US 2010/0244791 A1Published application
System and Method for Regulating a Power Supply
AssigneeInfineon Technologies AG
InventorThomas Nirschl
Life of this patent
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Abstract
In an embodiment, a method for controlling an output voltage of a power supply system is disclosed. The method includes regulating the power supply to a first voltage. After regulating the power supply to a first voltage, the power supply is regulated to a second voltage, which includes changing an input to the power supply system, and altering charge at an output of the power supply system until the output voltage reaches the second output voltage.
Claims23
(canceled)
A method for controlling an output voltage of a power supply system comprising a charge pump, the method comprising:
- regulating the output voltage to a first voltage, regulating the output to the first voltage comprising
- activating the charge pump when the output voltage crosses the first voltage in a first direction, and
- deactivating the charge pump when the output voltage crosses the first voltage in a second direction, the second direction opposite the first direction;
- and
- after regulating the output voltage to the first voltage, regulating the output voltage to a second voltage, regulating the output voltage to the second voltage comprising
- changing an input to the power supply system, and
- altering charge at an output of the power supply system until the output voltage reaches the second voltage,
- activating the charge pump when the output voltage crosses the second voltage in the first direction, and
- deactivating the charge pump when the output voltage crosses the second voltage in the second direction.
6 more elements
A method for controlling an output voltage of a power supply system comprising a charge pump, the method comprising:
- regulating the output voltage to a first voltage, regulating the output to the first voltage comprising
- dividing the output voltage according to a first transformation;
- forming a first divided voltage based on dividing the output voltage according to the first transformation,
- activating the charge pump when the first divided voltage crosses a reference voltage in a first direction, and
- deactivating the charge pump when the first divided voltage crosses the reference voltage in a second direction, the second direction opposite the first direction;
- and
- after regulating the output voltage to the first voltage, regulating the output voltage to a second voltage, regulating the output voltage to the second voltage comprising
- changing an input to the power supply system,
- altering charge at an output of the power supply system until the output voltage reaches the second voltage, and
- dividing the output voltage according to a second transformation,
- forming a second divided voltage based on dividing the output voltage according to the second transformation,
- activating the charge pump when the second divided voltage crosses the reference voltage in a first direction, and
- deactivating the charge pump when the second divided voltage crosses the reference voltage in the second direction;
- and
- altering charge further comprises altering charge until the second divided voltage crosses the reference voltage in the second direction.
12 more elements
A power supply system comprising:
- a charge pump comprising
- a clock input,
- an enable input, and
- a supply output;
- a programmable voltage divider comprising
- a first input coupled to the charge pump supply output,
- a second input coupled to a first reference voltage, and
- a divided voltage output, and
- a programming input configured to affect the divided voltage output;
- a comparator comprising
- a first input coupled to the divided voltage output,
- a second input coupled to an input reference voltage,
- an output coupled to the enable input of the charge pump;
- and
- a discharge circuit coupled to the charge pump supply output comprising:
- an activation input, and
- a deactivation input coupled to the output of the comparator, wherein the discharge circuit is configured to
- start discharging the charge pump supply output when the activation input changes state, and
- stop discharging the charge pump supply output when the activation input changes state.
16 more elements
A semiconductor circuit comprising:
- a charge pump power supply;
- a programmable voltage divider coupled to an output of the charge pump power supply, the programmable voltage divider comprising an output configured to output a signal proportional to a voltage at the output of the charge pump power supply according to a ratio selectable by a programming input;
- a comparator coupled to the output of the programmable voltage divider, the comparator comprising an output configured to change state when the output of the programmable voltage crosses a predetermined threshold;
- a latch coupled to the output of the comparator, the latch configured to be set when a first external signal is asserted, and reset when the output of the comparator changes state from a first state to a second state;
- and
- a discharge circuit configured to discharge the output of the power supply when the latch is set.
3 more elements
A semiconductor memory circuit comprising:
- a memory circuit comprising a power input;
- a charge boosted power supply comprising:
- an output coupled to the power input of the memory,
- a clock generator,
- an enable input, and
- a capacitive charge boost circuit;
- a programmable voltage divider comprising:
- a first node coupled to the output of the charge boosted power supply;
- a programming input configured to set a voltage divider ratio;
- an output;
- a comparator comprising
- a first input coupled the output of the programmable voltage divider;
- a second input coupled to a reference voltage;
- an output coupled to the enable input of the charge boosted power supply;
- a latch comprising
- a first input coupled to the output of the comparator, and
- a second input coupled to a first external input;
- and
- a transistor comprising
- an output node coupled to the output of the charge boosted power supply, and
- a control node coupled an output of the latch.
18 more elements
Dependencies are inferred from the claim text.