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US 7,145,366 B2Granted
Electronic circuit with a differential pair of transistors and logic gate comprising such a circuit
AssigneeSTMicroelectronics S.r.l.
InventorsSébastien Rieubon, Serge Ramet, Philippe Level
Life of this patent
Estimating the term…
Abstract
An electronic circuit includes at least one differential pair of transistors, a control transistor switch, a first current source and a second current source. The second current source is connected to a common emitter node of the pair of transistors in order to accelerate the discharge of parasitic capacitances during a switching operation.
Claims26
An electronic circuit, comprising:
- a first differential pair of transistors;
- a second differential pair of transistors, wherein a first transistor of the second pair is coupled to a common emitter node of the first differential pair and a second transistor of the second pair is coupled to a collector node of one transistor of the first pair;
- a first current source connected to a common emitter node of the second differential pair of transistors;
- a second current source connected to the common emitter node of the first differential pair of transistors and generating a current which is not sunk through the first current source.
1 more element
An electronic circuits comprising:
- a first differential pair of transistors;
- a second differential pair of transistors, the first and second pairs being superimposed such that a common emitter node for the first pair of transistors is connected to a collector of a transistor of the second pair and that a collector of a transistor of the first pair is connected to the collector of another the transistor of the second pair;
- a first current source connected to the common emitter node of the first differential pair of transistors;
- and
- a second current source connected to a common emitter node of the second differential pair of transistors, wherein a current of the first current source does not flow through the second current source.
2 more elements
A circuit, comprising:
- a first differential pair of transistors connected at a first common emitter node;
- a first current source connected between the first common emitter node and a first reference voltage;
- a first switch connected between the first common emitter node and a first control node;
- a second switch connected between a collector of one transistor in the first differential pair and the first control node;
- and
- a second current source connected between the first control node and the first reference voltage.
3 more elements
A circuit, comprising:
- a differential pair of transistors connected at a common emitter node;
- a first current source connected between the common emitter node and a first reference voltage;
- a first switch connected between the common emitter node and a control node;
- a second switch connected between the control node and a collector node of one of the transistors in the differential pair;
- and
- a second current source connected between the control node and the first reference voltage.
3 more elements
A circuit, comprising:
- a first differential pair of transistors connected at a common conduction node;
- a first current source connected between the common conduction node and a first reference voltage;
- a transistor switch connected between the common conduction node and a control node;
- a second transistor switch connected between an other conduction node of one transistor in the differential pair and the control node;
- and
- a second current source connected between the control node and the first reference voltage.
3 more elements
Dependencies are inferred from the claim text.