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US 2016/0078909 A1Published application
Output buffer circuit with low sub-threshold leakage current
AssigneeMicron Technology, Inc.
InventorsTetsuya Arai, Yoshinori Matsui
Life of this patent
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Abstract
A device includes a cutting circuit that is coupled between power supply lines in series with first and second output circuits which drive an output terminal in a push-pull manner. Each of the first and second output circuits includes a plurality of output transistors. The cutting circuit is rendered non-conductive when each of the transistors in the first and second output circuits is rendered non-conductive.
Claims20
A device comprising:
- first and second power terminals;
- an output terminal;
- a plurality of first output transistors each including a first gate and first and second nodes, the first node of each of the first output transistors being coupled to the first power terminal and the second node of each of the first output transistors being coupled to the output terminal;
- a plurality of second output transistors each including a second gate and third and fourth nodes, the third node of each of the second output transistors being coupled to the output terminal and the fourth node of each of the second output transistors being coupled to the second power terminal;
- a control circuit producing a set of first control signals and a set of second control signals, the first control signals being supplied respectively to the first gates of the first output transistors to render selected one or ones of the first output transistors conductive or to render each of the first output transistors non-conductive, and the second control signals being supplied respectively to the second gates of the second output transistors to render selected one or ones of the second output transistors conductive or to render each of the second output transistors non-conductive;
- and
- a cutting circuit inserted between at least one of the first and second power terminals and the output terminal and being rendered non-conductive when each of the first and second output transistors is rendered non-conductive.
4 more elements
A device comprising:
- first and second power supply lines;
- a data terminal;
- a first output circuit coupled between the first power supply line and the data terminal, and the first output circuit comprising a plurality of first output transistors coupled in parallel to each other, each of the first output transistors being of a first conductivity type;
- a second output circuit coupled between the data terminal and the second power supply line, the second output circuit comprising a plurality of second output transistors coupled in parallel to each other, each of the second output transistors being of the first conductivity type;
- a plurality of first logic circuits each associated with a corresponding one of the first output transistors;
- a plurality of second logic circuits each associated with a corresponding one of the second output transistors;
- and
- a first cutting transistor inserted between the first and second power supply lines in series with the first and second output circuits, the cutting transistor being of a second conductivity, and the first and second conductivity types being different from each other.
5 more elements
A device comprising:
- a data node supplied with a data signal;
- a plurality of first control nodes supplied with a plurality of first control signals, respectively;
- a plurality of second control nodes supplied with a plurality of second control signals, respectively;
- an output terminal;
- first and second intermediate nodes;
- a plurality of first transistors each coupled between the output terminal and the first intermediate node and configured to drive the output terminal when rendered conductive in response to the data signal and an associated one of the first control signals;
- a plurality of second transistors each coupled between the output terminal and the second intermediate node and configured to drive the output terminal when rendered conductive in response to the data signal and an associated one of the second control signals;
- a power supply line;
- a third control node supplied with a third control signal, the third control signal being independent of each of the first and second control signals;
- and
- a cutting circuit coupled between the power supply line and one of the first and second intermediate nodes and configured to form an electrical path therebetween when rendered conductive in response to the third control signal.
8 more elements
Dependencies are inferred from the claim text.