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US 8,552,898 B2Granted
Apparatus and method for dynamically dampening a transient step response
AssigneeTexas Instruments Incorporated
InventorsJim Kien Huy Le, Abidur Rahman
Life of this patent
Estimating the term…
Abstract
A circuit has a digital to analog (DA) resistance ladder having an analog output; a capacitor coupled to the analog output; a first resistance coupled from the capacitor to ground; and a switch coupled to the capacitor in parallel to the resistor, wherein the switch, when closed, has a second resistance, and the first resistance is greater than the second resistance.
Claims20
A circuit, comprising:
- a digital to analog (DA) resistance ladder having an analog output;
- a capacitor coupled to the analog output;
- a first resistance coupled from the capacitor to ground;
- a switch coupled to the capacitor in parallel to the resistor, wherein the switch, when closed, has a second resistance, and the first resistance is greater than the second resistance.
1 more element
A system, comprising:
- an analog output;
- a capacitor coupled to the analog output ;
- a first resistance coupled from the node to ground;
- a switch coupled to the node in parallel to the resistor,
- wherein the switch, when closed, has a second resistance, and the first resistance is greater than the second resistance;
- a driver coupled to a gate of the switch;
- and
- a logic coupled to the driver, wherein the logic directs the driver to:
- a) close the switch to mitigate a transient in the analog output, and
- b) open the switch after the transient has occurred.
7 more elements
A method, comprising:
- trickle charging a capacitor through a series resistor;
- transitioning a voltage at a output node coupled to the capacitor;
- closing a switch if a dampening of a transient is needed;
- shorting the series resistor by closing the switch;
- and
- mitigating the transient through employment of the capacitor.
3 more elements
Dependencies are inferred from the claim text.