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US 4,697,112 AGranted
Current-mirror type sense amplifier
AssigneeKabushiki Kaisha Toshiba
InventorsTakayuki Ohtani, Mitsuo Isobe, Akira Aono, Nobuaki Urakawa
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Abstract
There is disclosed a sense amplifier characterized by comprising a pull-up circuit. The pull-up circuit comprises a first transistor arranged between the first of a pair of output nodes and a pull-up power source potential node, and a second transistor arranged between the second of the pair of output nodes and the pull-up power source potential node. The gate of the first transistor is connected to the second output node and the gate of the second transistor is connected to the first output node.
Claims5
A current-mirror type sense amplifier comprising:
- first and second input terminals;
- first and second output terminals;
- a first power source node connected to a first power source potential;
- a second power source node connected to a second power source potential;
- a pull-up node connected to a pull-up potential;
- a differential amplifier for amplifying an input signal between said first and second input terminals to create a potential difference between said first and second output terminals, said differential amplifier including first and second MOS transistors of a first conductivity type, said first MOS transistor having a gate connected to said first input terminal and a drain-source path coupled between said second power source node and said first output terminal, and said second MOS transistor having a gate connected to said second input terminal and a drain-source path coupled between said second power source node and said second output terminal;
- a current-mirror type load circuit comprising third and fourth MOS transistors of a second conductivity type, said third and fourth MOS transistor having gates connected to each other and to said first output terminal, said third MOS transistor having a drain-source path coupled between said first power source node and said first output terminal, and said fourth MOS transistor having a drain-source path coupled between said first power source node and said second output terminal;
- and
- pull-up circuit means for increasing the potential difference between said output terminals, said pull-up circuit means including fifth and sixth MOS transistors of said second conductivity type, said fifth MOS transistor having a gate connected to said second output terminal and a drain-source path coupled between said pull-up node and said first output terminal, and said sixth MOS transistor having a gate connected to said first output terminal and a drain-source path coupled between said pull-up node and said second output terminal.
6 more elements
Dependencies are inferred from the claim text.