Power distribution network (PDN) conditioner
First Claim
Patent Images
1. A power circuit, comprising:
- a capacitor coupled to a high-voltage rail; and
a droop slope limiter (DSL) coupled between the high-voltage rail and a power rail, wherein the DSL comprises;
a slope-detection circuit configured to detect a downward voltage slope on the power rail, and to output a slope signal based on the detected downward voltage slope;
a power transistor coupled between the high-voltage rail and the power rail; and
a control circuit configured to compare the slope signal from the slope-detection circuit with a slope-threshold signal, to turn on the power transistor if the slope signal is above the slope-threshold signal to allow current flow from the capacitor to the power rail, and to turn off the power transistor if the slope signal is below the slope-threshold signal to block the current flow from the capacitor to the power rail.
1 Assignment
0 Petitions
Accused Products
Abstract
Systems and methods for conditioning a power rail (e.g., reducing voltage droops and/or voltage overshoots on the power rail) are described herein. In one embodiment, a power circuit comprises a capacitor coupled to a high-voltage rail, and a droop slope limiter (DSL) coupled between the high-voltage rail and a power rail. The DSL is configured to detect a downward voltage slope on the power rail, and to control current flow from the high-voltage rail to the power rail through the DSL based on the detected downward voltage slope.
20 Citations
28 Claims
-
1. A power circuit, comprising:
-
a capacitor coupled to a high-voltage rail; and a droop slope limiter (DSL) coupled between the high-voltage rail and a power rail, wherein the DSL comprises; a slope-detection circuit configured to detect a downward voltage slope on the power rail, and to output a slope signal based on the detected downward voltage slope; a power transistor coupled between the high-voltage rail and the power rail; and a control circuit configured to compare the slope signal from the slope-detection circuit with a slope-threshold signal, to turn on the power transistor if the slope signal is above the slope-threshold signal to allow current flow from the capacitor to the power rail, and to turn off the power transistor if the slope signal is below the slope-threshold signal to block the current flow from the capacitor to the power rail. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 27, 28)
-
-
10. A method for conditioning a power rail, comprising:
-
detecting a downward voltage slope on the power rail; and controlling current flow from a capacitor to the power rail via a high-voltage rail based on the detected downward voltage slope, wherein controlling the current flow further comprises; blocking the current flow from the capacitor to the power rail if a magnitude of the detected downward voltage slope is below a slope threshold; and allowing the current flow from the capacitor to the power rail if the magnitude of the detected downward voltage slope exceeds the slope threshold. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
-
-
18. An apparatus for conditioning a power rail, comprising:
-
means for detecting a downward voltage slope on the power rail; and means for controlling current flow from a capacitor to the power rail via a high-voltage rail based on the detected downward voltage slope, wherein the means for controlling the current flow further comprises; means for blocking the current flow from the capacitor to the power rail if a magnitude of the detected downward voltage slope is below a slope threshold; and means for allowing the current flow from the capacitor to the power rail if the magnitude of the detected downward voltage slope exceeds the slope threshold. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
-
Specification