Voltage regulator circuitry
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorAkio Ogura
Life of this patent
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Abstract
Voltage regulator circuitry includes a first element, a second element, an amplifier and a reference voltage source. The first element converts an input voltage and outputs a predetermined output voltage. The second element outputs a current in proportion to a current based on the outputted voltage from the first element. The amplifier amplifies a differential voltage between a reference voltage and a voltage in proportion to the output voltage, the amplifier which controls the first element based on the differential voltage. The reference voltage source outputs the reference voltage which adapts to a comparison between the current outputted from the second element and a reference current.
Claims18
Voltage regulator circuitry comprising:
- a first element which converts an input voltage and outputs a predetermined output voltage;
- a second element which outputs a second current in proportion to a first current based on the outputted voltage from the first element;
- an amplifier which amplifies a differential voltage between a reference voltage and a voltage in proportion to the output voltage, the amplifier which controls the first element based on the amplified differential voltage;
- and
- a reference voltage source which outputs the reference voltage which adapts to a comparison between the second current outputted from the second element and a reference current,
- wherein the reference voltage source comprises:
- a first reference voltage source which outputs a first reference voltage;
- and
- a second reference voltage source which connects, based on the comparison, in parallel with the first reference voltage source and outputs a second reference voltage.
Voltage regulator circuitry comprising:
- a first transistor in which an input is connected with an input terminal and an output is connected with an output terminal;
- a first resistor in which one terminal is connected with the output of the first transistor;
- a second resistor connected between the other terminal of the first resistor and ground;
- a second transistor in which an input is connected with the input terminal and a driving terminal is connected with a driving terminal of the first transistor;
- a reference current source which makes a reference current flow;
- a first reference voltage source which applies a first reference voltage;
- a second reference voltage source in which an output is connected in parallel with the first reference voltage source and which applies a second reference voltage;
- a switch provided between an output of the first reference voltage and an output of the second reference voltage;
- a current comparator in which two inputs are connected with an output of the second transistor and the reference current source and an output controls the switch;
- and
- an amplifier in which two inputs are connected with an output of the first reference voltage source and with between the first resistor and the second resistor, and an output is connected with the driving terminal of the first transistor.
Dependencies are inferred from the claim text.