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US 7,091,750 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.
Claims24
A sense amplifier comprising:
- first and second transistors;
- first and second switches;
- and
- first, second and third capacitors;
- wherein a gate of the first transistor is electrically connected to a first terminal of the first switch, a first terminal of the first capacitor, and a first terminal of the third capacitor,
- wherein a drain of the first transistor is electrically connected to a second terminal of the first switch,
- wherein a source of the first transistor is electrically connected to a second terminal of the third capacitor,
- wherein a gate of the second transistor is electrically connected to a first terminal of the second switch and a first terminal of the second capacitor,
- wherein a drain of the second transistor is electrically connected to a second terminal of the second switch, and
- wherein sources of the first and second transistors are electrically connected to each other.
7 more elements
A sense amplifier comprising:
- first and second transistors;
- first, second and third switches;
- and
- first and second capacitors;
- wherein a gate of the first transistor is electrically connected to a first terminal of the first switch and a first terminal of the first capacitor,
- wherein a drain of the first transistor is electrically connected to a second terminal of the first switch,
- wherein a gate of the second transistor is electrically connected to a first terminal of the second switch and a first terminal of the second capacitor,
- wherein a drain of the second transistor is electrically connected to a second terminal of the second switch, and
- wherein sources of the first and second transistors are electrically connected to a power source through the third switch.
6 more elements
A sense amplifier comprising:
- first and second transistors;
- first, second, third and fourth switches;
- and
- first and second capacitors;
- wherein a gate of the first transistor is electrically connected to a first terminal of the first switch and a first terminal of the first capacitor,
- wherein a drain of the first transistor is electrically connected to a second terminal of the first switch,
- wherein a gate of the second transistor is electrically connected to a first terminal of the second switch and a first terminal of the second capacitor,
- wherein a drain of the second transistor is electrically connected to a second terminal of the second switch, and
- wherein drains of the first and second transistors are electrically connected to a power source through the third and fourth switches, respectively.
6 more elements
A sense amplifier comprising:
- first, second, third and fourth transistors;
- first, second, third and fourth switches;
- and
- first and second capacitors;
- wherein a gate of the first transistor is electrically connected to a first terminal of the first switch and a first terminal of the first capacitor,
- wherein a drain of the first transistor is electrically connected to a second terminal of the first switch,
- wherein a gate of the second transistor is electrically connected to a first terminal of the second switch and a first terminal of the second capacitor,
- wherein a drain of the second transistor is electrically connected to a second terminal of the second switch, and
- wherein a drain of the first transistor is connected to a power source through the third switch and the third transistor, a drain of the second transistor is connected to the power source through the fourth switch and the fourth transistor, and both gates of the third and fourth transistors are connected to a drain of the third transistor.
6 more elements
A sense amplifier comprising:
- first and second transistors;
- first, second, third, fourth and fifth switches;
- and
- first and second capacitors;
- wherein a gate of the first transistor is electrically connected to a first terminal of the first switch and a first terminal of the first capacitor,
- wherein a drain of the first transistor is electrically connected to a second terminal of the first switch,
- wherein a gate of the second transistor is electrically connected to a first terminal of the second switch and a first terminal of the second capacitor,
- wherein a drain of the second transistor is electrically connected to a second terminal of the second switch,
- wherein sources of the first and second transistors are electrically connected to a first power source through the third switch, and
- wherein drains of the first and second transistors are electrically connected to a second power source through the fourth and fifth switches, respectively.
7 more elements
A sense amplifier comprising:
- first and second transistors;
- first, second, third, fourth, fifth and sixth switches;
- and
- first and second capacitors;
- wherein a gate of the first transistor is electrically connected to a first terminal of the first switch and a first terminal of the first capacitor,
- wherein a drain of the first transistor is electrically connected to a second terminal of the first switch,
- wherein a gate of the second transistor is electrically connected to a first terminal of the second switch and a first terminal of the second capacitor,
- wherein a drain of the second transistor is electrically connected to a second terminal of the second switch,
- wherein sources of the first and second transistors are electrically connected to each other,
- wherein a second terminal of the first capacitor is electrically connected to a first input terminal and a first power source through the third switch and the fourth switch, respectively, and
- wherein a second terminal of the second capacitor is electrically connected to a second input terminal and the first power source through the fifth switch and the sixth switch, respectively.
8 more elements
Dependencies are inferred from the claim text.