Electronic circuitry
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorNorihiro UEDA
Life of this patent
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Abstract
According to one embodiment, an electronic circuitry comprises a first transistor connected between an input voltage line and an output terminal, an input voltage being supplied to the input voltage line; and a current limiting circuit configured to limit an output current of the first transistor to a limiting current or less by restricting a variable range of a drive voltage of the first transistor within a predetermined range, the limiting current being determined by a reference voltage having a dependency on the input voltage.
Claims14
An electronic circuitry comprising:
- a first transistor connected between an input voltage line and an output terminal, an input voltage being supplied to the input voltage line;
- and
- a current limiting circuit configured to limit an output current of the first transistor to a limiting current or less by restricting a variable range of a drive voltage of the first transistor within a predetermined range, the limiting current being determined by a reference voltage having a dependency on the input voltage.
An electronic circuitry comprising:
- a first transistor connected between an input voltage line and an output terminal, an input voltage being supplied to the input voltage line;
- a second transistor connected between the input voltage line and a first node;
- a current limiting circuit including a third diode-connected transistor and an error amplifier;
- a constant current circuit configured to keep a total of a reference current and an output current of the second transistor constant;
- and
- a first voltage fixing circuit connected to the third transistor and configured to fix a voltage of the first node to a predetermined first setting voltage.
An electronic circuitry comprising:
- a first transistor connected between an input voltage line and an output terminal, an input voltage being supplied to the input voltage line;
- a second transistor connected to the input voltage line and a first node;
- a third diode-connected transistor configured to generate a reference voltage by generating a reference current corresponding to the input voltage;
- a current limiting circuit configured to limit an output current of the first transistor to a limiting current or less by restricting a variable range of a drive voltage of the first transistor within a predetermined range, the limiting current depending on the reference voltage;
- a constant current circuit configured to keep a total of the reference current and an output current of the second transistor constant;
- and
- a second voltage fixing circuit configured to fix a drain-source voltage of the second transistor to a predetermined second setting voltage.
Dependencies are inferred from the claim text.