Current mirror circuit
AssigneeSocionext Inc.
InventorYishen Hu
Life of this patent
Estimating the term…
Abstract
A current mirror circuit includes: a plurality of first transistors connected to a first power supply at their sources and to an input terminal at their gates and drains; and a second transistor connected to the first power supply at its source, to the input terminal at its gate, and to an output terminal at its drain. A switch circuit is provided between at least one of the first transistors and the input terminal. The switch circuit includes third and fourth transistors connected in series between the first transistor and the input terminal, an inverter circuit, and a fifth transistor connected between a middle node of the third and fourth transistors and an output terminal of the inverter circuit. A switch control signal is given to the gates of the third to fifth transistors and to the input of the inverter circuit.
Claims4
A current mirror circuit, comprising:
- an input terminal receiving an input current;
- an output terminal from which an output current is output;
- a plurality of first transistors of a first conductivity type, connected to a first power supply at their sources and to the input terminal at their gates and drains;
- and
- a second transistor of the first conductivity type, connected to the first power supply at its source, to the input terminal at its gate, and to the output terminal at its drain, wherein
- a switch circuit is provided between at least one of the plurality of first transistors and the input terminal, and
- the switch circuit includes
- a third transistor and a fourth transistor of the first conductivity type, connected in series between the drain of the first transistor and the input terminal, receiving a switch control signal for on/off control of the switch circuit at their gates,
- an inverter circuit receiving the switch control signal at its input terminal, and
- a fifth transistor of a second conductivity type, connected to an output terminal of the inverter circuit at one of its drain and source and to a middle node between the third transistor and the fourth transistor at the other of the drain and source, and receiving the switch control signal at its gate.
A current mirror circuit, comprising:
- an input terminal receiving an input current;
- an output terminal from which an output current is output;
- a first transistor of a first conductivity type, connected to a first power supply at its source and to the input terminal at its gate and drain;
- and
- a plurality of second transistors of the first conductivity type, connected to the first power supply at their sources, to the input terminal at their gates, and to the output terminal at their drains, wherein
- a switch circuit is provided between at least one of the plurality of second transistors and the output terminal, and
- the switch circuit includes
- a third transistor and a fourth transistor of the first conductivity type, connected in series between the drain of the second transistor and the output terminal, receiving a switch control signal for on/off control of the switch circuit at their gates,
- an inverter circuit receiving the switch control signal at its input terminal, and
- a fifth transistor of a second conductivity type, connected to a middle node between the third transistor and the fourth transistor at one of its drain and source and to an output terminal of the inverter circuit at the other of the drain and source, and receiving the switch control signal at its gate.
Dependencies are inferred from the claim text.