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US 8,149,018 B2Granted
Sense amplifier and electronic apparatus using the same
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsYutaka Shionoiri, Kiyoshi Kato, Munehiro Azami
Life of this patent
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Abstract
A sense amplifier according to the present invention for detecting a potential difference of signals input to a first input terminal and a second input terminal, includes a first means for applying voltages corresponding to threshold voltages of first and second transistors to gate-source voltages of the first and second transistors, and a second means for transferring signals input to the first and second input terminals to gates of the first and second transistors. In this case, a threshold variation of the first and second transistors is corrected.
Claims29
A sense amplifier comprising:
- a first power source;
- a first transistor having a first terminal, a second terminal, and a gate, wherein the first terminal of the first transistor is electrically connected to the first power source;
- a second transistor having a first terminal, a second terminal, and a gate, wherein the first terminal of the second transistor is electrically connected to the first power source;
- a first means for storing a voltage between the gate of the first transistor and the second terminal of the first transistor,
- wherein the voltage corresponds to a threshold voltage of the first transistor.
2 more elements
A sense amplifier comprising:
- a first power source;
- a first transistor having a first terminal, a second terminal, and a gate, wherein the first terminal of the first transistor is electrically connected to the first power source;
- a second transistor having a first terminal, a second terminal, and a gate, wherein the first terminal of the second transistor is electrically connected to the first power source;
- a first means for storing a voltage between the gate of the second transistor and the second terminal of the second transistor,
- wherein the voltage corresponds to a threshold voltage of the second transistor.
2 more elements
A sense amplifier comprising:
- a first input terminal;
- a second input terminal;
- an output terminal;
- a first power source;
- a second power source;
- a first transistor having a first terminal, a second terminal, and a gate, wherein the gate of the first transistor is electrically connected to the first input terminal;
- a second transistor having a first terminal, a second terminal, and a gate, wherein the gate of the second transistor is electrically connected to the second input terminal;
- a first switch which electrically connects the first terminal of the first transistor and the first terminal of the second transistor to the second power source;
- a third transistor having a first terminal, a second terminal, and a gate, wherein the first terminal of the third transistor is electrically connected to the first power source and the second terminal of the third transistor is electrically connected to the second terminal of the first transistor;
- a fourth transistor having a first terminal, a second terminal, and a gate, wherein the first terminal of the fourth transistor is electrically connected to the first power source and the second terminal of the fourth transistor is electrically connected to the second terminal of the second transistor and the output terminal;
- and
- a first means for storing a voltage between the gate of the third transistor and the second terminal of the third transistor,
- wherein the voltage corresponds to a threshold voltage of the third transistor.
10 more elements
A sense amplifier comprising:
- a first input terminal;
- a second input terminal;
- an output terminal;
- a first power source;
- a second power source;
- a first transistor having a first terminal, a second terminal, and a gate, wherein the gate of the first transistor is electrically connected to the first input terminal;
- a second transistor having a first terminal, a second terminal, and a gate, wherein the gate of the second transistor is electrically connected to the second input terminal;
- a first switch which electrically connects the first terminal of the first transistor and the first terminal of the second transistor to the second power source;
- a third transistor having a first terminal, a second terminal, and a gate, wherein the first terminal of the third transistor is electrically connected to the first power source and the second terminal of the third transistor is electrically connected to the second terminal of the first transistor;
- a fourth transistor having a first terminal, a second terminal, and a gate, wherein the first terminal of the fourth transistor is electrically connected to the first power source and the second terminal of the fourth transistor is electrically connected to the second terminal of the second transistor and the output terminal;
- and
- a first means for storing a voltage between the gate of the fourth transistor and the second terminal of the fourth transistor,
- wherein the voltage corresponds to a threshold voltage of the fourth transistor.
10 more elements
Dependencies are inferred from the claim text.