Output buffer circuit
DCFirst Claim
Patent Images
1. An output driver circuit, comprising:
- at least a first driver transistor having a source-drain path coupled between a first power supply node and an output node;
a first variable current supply that generates a current having at least one component that is inversely proportional to a power supply voltage; and
a first driver switch element coupled in series with the first variable current supply between a gate of the at least first driver transistor and a second power supply node, wherein the first driver switch and the first variable current supply are configured to control a rise time of the output driver circuit.
5 Assignments
Litigations
1 Petition
Accused Products
Abstract
An output driver circuit can include at least a first driver transistor having a source-drain path coupled between a first power supply node and an output node. A first variable current supply can generate a current having at least one component that is inversely proportional to a power supply voltage. A first driver switch element can be coupled in series with the first variable current supply between a gate of the at least first driver transistor and a second power supply node.
88 Citations
14 Claims
-
1. An output driver circuit, comprising:
-
at least a first driver transistor having a source-drain path coupled between a first power supply node and an output node; a first variable current supply that generates a current having at least one component that is inversely proportional to a power supply voltage; and a first driver switch element coupled in series with the first variable current supply between a gate of the at least first driver transistor and a second power supply node, wherein the first driver switch and the first variable current supply are configured to control a rise time of the output driver circuit. - View Dependent Claims (2, 3, 4, 5, 6, 14)
-
-
7. An output driver circuit, comprising:
-
a first driver transistor that provides a low impedance path to an output node in response to a voltage at a first driver control node; a first switch element coupled between the first driver control node and a first power supply node; and a selectable current source coupled between the first driver control node and a second power supply node, the selectable current source generating a drive current that varies in response to a drive select value, wherein the selectable current source includes a plurality of selectable current legs, each connected to a current control node and enabled to provide a current to the current control node in response to a corresponding drive control signal. - View Dependent Claims (8, 9, 10, 13)
-
-
11. An output driver circuit, comprising:
-
a first driver transistor that provides a low impedance path to an output node in response to a voltage at a first driver control node; a second driver transistor that provides a low impedance path to the output node in response to a voltage at a second driver control node; and a first switch element coupled between the first driver control node and a first power supply node, and between the second driver control node and the first power supply node, the selectable current source generating a drive current that varies in response to a drive select value. - View Dependent Claims (12)
-
Specification