Semiconductor integrated circuit device and current detection circuit
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorsTomohiro Ando, Kazuhiro Taguchi
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Abstract
According to an embodiment, a semiconductor integrated circuit device has a first switching element that is connected between first and second nodes, a second switching element that is connected between the first node and a third node and outputs a current that is 1/K times as much as an output current of the first switching element, and an amplifier that controls, by a signal provided by amplifying a voltage difference between the third node and a fourth node, a conduction state of a third switching element that is connected between the fourth node and a fifth node.
Claims20
A semiconductor integrated circuit device, comprising:
- a first switching element that is provided with a main current path that is connected between a first node and a second node, and outputs a first output current;
- a second switching element that is provided with a main current path that is connected between the first node and a third node, and outputs a second output current that is one K-th times as much as the first output current (where K is any positive number that is greater than 1);
- a third switching element that is provided with a main current path that is connected between a fourth node and a fifth node;
- and
- a differential amplifier that outputs a signal provided by amplifying a voltage difference that is generated between the third node and the fourth node to control a conduction state of the third switching element.
A current detection circuit, comprising:
- a first switching element that is provided with a main current path that is connected between a first node and a second node, and outputs a first output current;
- a second switching element that is provided with a main current path that is connected between the first node and a third node, and outputs a second output current that is one K-th times as much as the first output current (where K is any positive number that is greater than 1);
- a third switching element that is provided with a main current path that is connected between a fourth node and a fifth node;
- a differential amplifier that outputs a signal provided by amplifying a voltage difference that is generated between the third node and the fourth node to control a conduction state of the third switching element;
- a first resistor that is provided with one end that is connected to the second and third nodes and another end where a first voltage is applied thereto;
- and
- a second resistor that is provided with one end that is connected to the fourth node and another end where the first voltage is applied thereto,
- wherein the second resistor is set at a resistance value that is K times as much as that of the first resistor.
A current detection circuit, comprising:
- a first switching element that is provided with a main current path that is connected between a first node and a second node, and outputs a first output current;
- a second switching element that is provided with a main current path that is connected between the first node and a third node, and outputs a second output current that is one K-th times as much as the first output current (where K is any positive number that is greater than 1);
- a third switching element that is provided with a main current path that is connected between a fourth node and a fifth node;
- a differential amplifier that outputs a signal provided by amplifying a voltage difference that is generated between the third node and the fourth node to control a conduction state of the third switching element;
- a connection means that connects the second node to a first power source terminal;
- a third resistor that is provided with one end that is connected to the third node and another end where a voltage at the first power source terminal is applied thereto;
- and
- a fourth resistor that is provided with one end that is connected to the fourth node and another end where a voltage at the first power source terminal is applied thereto,
- wherein the third resistor and the fourth resistor are set at identical resistance values thereof.
Dependencies are inferred from the claim text.