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US 8,212,540 B2Granted
Voltage generating circuit
AssigneePanasonic Corporation
InventorTomokazu Kojima
Life of this patent
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Abstract
A voltage generating circuit according to the present invention comprises a voltage converter which voltage-converts a reference voltage, and an output unit which impedance-converts the voltage outputted from the voltage converter. The voltage converter and the output unit each comprise a low-voltage-side power supply and a high-voltage-side power supply. A voltage level of the high-voltage-side power supply in the output unit is set to be higher than a voltage level of the high-voltage-side power supply in the voltage converter.
Claims44
A voltage generating circuit comprising:
- a voltage converter for voltage-converting a reference voltage;
- and
- an output unit for impedance-converting the voltage outputted from the voltage converter,
- wherein a low-voltage-side power supply and a high-voltage-side power supply are connected to each of the voltage converter and the output unit, and
- a voltage level of the high-voltage-side power supply in the output unit is set to be higher than a voltage level of the high-voltage-side power supply in the voltage converter,
- wherein the voltage converter comprises:
- an operational amplifier provided with an input terminal to which the reference voltage is inputted and an output terminal;
- a variable resistance connected to the output terminal;
- and
- a controller for controlling the operational amplifier, and
- wherein the operational amplifier is configured to operate as a voltage follower in accordance with the control by the controller and thereby divides an output voltage thereof by the variable resistance and outputs the divided voltage.
8 more elements
A voltage generating circuit comprising:
- a voltage converter for voltage-converting a reference voltage;
- and
- an output unit for impedance-converting the voltage outputted from the voltage converter,
- wherein a low-voltage-side power supply and a high-voltage-side power supply are connected to each of the voltage converter and the output unit,
- a voltage difference between the high-voltage-side power supply and the low-voltage-side power supply in the voltage converter is set to be smaller than a voltage difference between the high-voltage-side power supply and the low-voltage-side power supply in the output unit, and
- a dielectric breakdown voltage of the voltage converter is set to be smaller than a dielectric breakdown voltage of the output unit,
- wherein the voltage converter comprises:
- an operational amplifier provided with an input terminal to which the reference voltage is inputted and an output terminal;
- a variable resistance connected to the output terminal;
- and
- a controller for controlling the operational amplifier, and
- wherein the operational amplifier is configured to operate as a voltage follower in accordance with the control by the controller and thereby divides an output voltage thereof by the variable resistance and outputs the divided voltage.
9 more elements
A voltage generating circuit comprising:
- a voltage converter for voltage-converting a reference voltage;
- and
- an output unit for impedance-converting the voltage outputted from the voltage converter,
- wherein a low-voltage-side power supply and a high-voltage-side power supply are connected to each of the voltage converter and the output unit,
- a voltage difference between the high-voltage-side power supply and the low-voltage-side power supply in the voltage converter is set to be higher than a voltage difference between the high-voltage-side power supply and the low-voltage-side power supply in the output unit, and
- a dielectric breakdown voltage of the voltage converter is set to be higher than a dielectric breakdown voltage of the output unit,
- wherein the voltage converter
- an operational amplifier provided with an input terminal to which the reference voltage is inputted and an output terminal;
- a variable resistance connected to the output terminal;
- and
- a controller for controlling the operational amplifier, and
- wherein the operational amplifier is configured to operate as a voltage follower in accordance with the control by the controller and thereby divides an output voltage thereof by the variable resistance and outputs the divided voltage.
9 more elements
A voltage generating circuit comprising:
- a voltage converter for voltage-converting a reference voltage;
- and
- an output unit for impedance-converting the voltage outputted from the voltage converter,
- wherein a low-voltage-side power supply and a high-voltage-side power supply are connected to the voltage converter,
- the output unit comprises a plurality of first operational amplifiers,
- at least a low-voltage-side power supply and at least a high-voltage-side power supply are connected to the first operational amplifier,
- output voltages of the high-voltage-side power supply and the low-voltage-side power supply in the first operational amplifier are set to stay within a voltage difference range between a voltage higher than an output voltage of the high-voltage-side power supply in the voltage converter and a voltage lower than an output voltage of the low-voltage-side power supply in the voltage converter, and
- a dielectric breakdown voltage of the output unit is set to be equal to or lower than a dielectric breakdown voltage of the voltage converter,
- wherein the voltage converter comprises:
- a second operational amplifier provided with an input terminal to which the reference voltage is inputted and an output terminal;
- a variable resistance connected to the output terminal;
- and
- a controller for controlling the second operational amplifier,
- wherein the second operational amplifier is configured to operate as a voltage follower in accordance with the control by the controller and thereby divides an output voltage thereof by the variable resistance and outputs the divided voltage.
11 more elements
A voltage generating circuit comprising:
- a voltage converter for voltage-converting a reference voltage;
- and
- an output unit for impedance-converting the voltage outputted from the voltage converter,
- wherein a low-voltage-side power supply and a high-voltage-side power supply are connected to each of the voltage converter and the output unit, and
- a voltage level of the high-voltage-side power supply in the output unit is set to be higher than a voltage level of the high-voltage-side power supply in the voltage converter,
- wherein the voltage converter comprises:
- an operational amplifier provided with an input terminal to which the reference voltage is inputted, an inversion input terminal and an output terminal;
- a variable resistance connected to the output terminal and ground;
- and
- a controller for controlling the operational amplifier, and
- wherein the operational amplifier is configured to operate as a non-inversion amplifier, and
- the variable resistance has a plurality of resistance-dividing points connected to the inversion input terminal and selects the resistance-dividing points in accordance with the control by the controller.
9 more elements
A voltage generating circuit comprising:
- a voltage converter for voltage-converting a reference voltage;
- and
- an output unit for impedance-converting the voltage outputted from the voltage converter,
- wherein a low-voltage-side power supply and a high-voltage-side power supply are connected to each of the voltage converter and the output unit,
- a voltage difference between the high-voltage-side power supply and the low-voltage-side power supply in the voltage converter is set to be smaller than a voltage difference between the high-voltage-side power supply and the low-voltage-side power supply in the output unit, and
- a dielectric breakdown voltage of the voltage converter is set to be smaller than a dielectric breakdown voltage of the output unit,
- wherein the voltage converter comprises:
- an operational amplifier provided with an input terminal to which the reference voltage is inputted, an inversion input terminal and an output terminal;
- a variable resistance connected to the output terminal and ground;
- and
- a controller for controlling the operational amplifier, and
- wherein the operational amplifier is configured to operate as a non-inversion amplifier, and
- the variable resistance has a plurality of resistance-dividing points connected to the inversion input terminal and selects the resistance-dividing points in accordance with the control by the controller.
10 more elements
A voltage generating circuit comprising:
- a voltage converter for voltage-converting a reference voltage;
- and
- an output unit for impedance-converting the voltage outputted from the voltage converter,
- wherein a low-voltage-side power supply and a high-voltage-side power supply are connected to each of the voltage converter and the output unit,
- a voltage difference between the high-voltage-side power supply and the low-voltage-side power supply in the voltage converter is set to be higher than a voltage difference between the high-voltage-side power supply and the low-voltage-side power supply in the output unit, and
- a dielectric breakdown voltage of the voltage converter is set to be higher than a dielectric breakdown voltage of the output unit,
- wherein the voltage converter comprises:
- an operational amplifier provided with an input terminal to which the reference voltage is inputted, an inversion input terminal and an output terminal;
- a variable resistance connected to the output terminal and ground;
- and
- a controller for controlling the operational amplifier, and
- wherein the operational amplifier is configured to operate as a non-inversion amplifier, and
- the variable resistance has a plurality of resistance-dividing points connected to the inversion input terminal and selects the resistance-dividing points in accordance with the control by the controller.
10 more elements
A voltage generating circuit comprising:
- a voltage converter for voltage-converting a reference voltage;
- and
- an output unit for impedance-converting the voltage outputted from the voltage converter,
- wherein a low-voltage-side power supply and a high-voltage-side power supply are connected to the voltage converter,
- the output unit comprises a plurality of first operational amplifiers,
- at least a low-voltage-side power supply and at least a high-voltage-side power supply are connected to the first operational amplifier,
- output voltages of the high-voltage-side power supply and the low-voltage-side power supply in the first operational amplifier are set to stay within a voltage difference range between a voltage higher than an output voltage of the high-voltage-side power supply in the voltage converter and a voltage lower than an output voltage of the low-voltage-side power supply in the voltage converter, and
- a dielectric breakdown voltage of the output unit is set to be equal to or lower than a dielectric breakdown voltage of the voltage converter,
- wherein the voltage converter comprises:
- a second operational amplifier provided with an input terminal to which the reference voltage is inputted, an inversion input terminal and an output terminal;
- a variable resistance connected to the output terminal and ground;
- and
- a controller for controlling the second operational amplifier, and
- wherein the second operational amplifier is configured to operate as a non-inversion amplifier, and
- the variable resistance has a plurality of resistance-dividing points connected to the inversion input terminal and selects the resistance-dividing points in accordance with the control by the controller.
12 more elements
A voltage generating circuit comprising:
- a voltage converter for voltage-converting a reference voltage;
- and
- an output unit for impedance-converting the voltage outputted from the voltage converter,
- wherein a low-voltage-side power supply and a high-voltage-side power supply are connected to each of the voltage converter and the output unit, and
- a voltage level of the high-voltage-side power supply in the output unit is set to be higher than a voltage level of the high-voltage-side power supply in the voltage converter,
- wherein the voltage converter comprises:
- an operational amplifier provided with an input terminal to which the reference voltage is inputted, an inversion input terminal and an output terminal;
- a variable resistance connected to the output terminal and the input terminal;
- and
- a controller for controlling the operational amplifier, and
- wherein the operational amplifier is configured to operate as an inversion amplifier, and
- the variable resistance has a plurality of resistance-dividing points connected to the inversion input terminal and selects the resistance-dividing points in accordance with the control by the controller.
9 more elements
A voltage generating circuit comprising:
- a voltage converter for voltage-converting a reference voltage;
- and
- an output unit for impedance-converting the voltage outputted from the voltage converter,
- wherein a low-voltage-side power supply and a high-voltage-side power supply are connected to each of the voltage converter and the output unit,
- a voltage difference between the high-voltage-side power supply and the low-voltage-side power supply in the voltage converter is set to be smaller than a voltage difference between the high-voltage-side power supply and the low-voltage-side power supply in the output unit, and
- a dielectric breakdown voltage of the voltage converter is set to be smaller than a dielectric breakdown voltage of the output unit,
- wherein the voltage converter comprises:
- an operational amplifier provided with an input terminal to which the reference voltage is inputted, an inversion input terminal and an output terminal;
- a variable resistance connected to the output terminal and the input terminal;
- and
- a controller for controlling the operational amplifier, and
- wherein the operational amplifier is configured to operate as an inversion amplifier, and
- the variable resistance has a plurality of resistance-dividing points connected to the inversion input terminal and selects the resistance-dividing points in accordance with the control by the controller.
10 more elements
A voltage generating circuit comprising:
- a voltage converter for voltage-converting a reference voltage;
- and
- an output unit for impedance-converting the voltage outputted from the voltage converter,
- wherein a low-voltage-side a high-voltage-side power supply are connected to each of the voltage converter and the output unit,
- a voltage difference between the high-voltage-side power supply and the low-voltage-side power supply in the voltage converter is set to be higher than a voltage difference between the high-voltage-side power supply and the low-voltage-side power supply in the output unit, and
- a dielectric breakdown voltage of the voltage converter is set to be higher than a dielectric breakdown voltage of the output unit,
- wherein the voltage converter comprises:
- an operational amplifier provided with an input terminal to which the reference voltage is inputted, an inversion input terminal and an output terminal;
- a variable resistance connected to the output terminal and the input terminal;
- and
- a controller for controlling the operational amplifier, and
- wherein the operational amplifier is configured to operate as an inversion amplifier, and
- the variable resistance has a plurality of resistance-dividing points connected to the inversion input terminal and selects the resistance-dividing points in accordance with the control by the controller.
10 more elements
A voltage generating circuit comprising:
- a voltage converter for voltage-converting a reference voltage;
- and
- an output unit for impedance-converting the voltage outputted from the voltage converter,
- wherein a low-voltage-side power supply and a high-voltage-side power supply are connected to the voltage converter,
- the output unit comprises a plurality of first operational amplifiers,
- at least a low-voltage-side power supply and at least a high-voltage-side power supply are connected to the first operational amplifier,
- output voltages of the high-voltage-side power supply and the low-voltage-side power supply in the first operational amplifier are set to stay within a voltage difference range between a voltage higher than an output voltage of the high-voltage-side power supply in the voltage converter and a voltage lower than an output voltage of the low-voltage-side power supply in the voltage converter, and
- a dielectric breakdown voltage of the output unit is set to be equal to or lower than a dielectric breakdown voltage of the voltage converter,
- wherein the voltage converter comprises:
- a second operational amplifier provided with an input terminal to which the reference voltage is inputted, an inversion input terminal and an output terminal;
- a variable resistance connected to the output terminal and the input terminal;
- and
- a controller for controlling the second operational amplifier, and
- wherein the second operational amplifier is configured to operate as an inversion amplifier, and
- the variable resistance has a plurality of resistance-dividing points connected to the inversion input terminal and selects the resistance-dividing points in accordance with the control by the controller.
12 more elements
Dependencies are inferred from the claim text.