US 12,007,826 B2 · Unified retention and wake-up clamp apparatus and method

Abstract

Described is a controller that provides in-situ state retention using a closed loop global retention clamp. The controller addresses di/dt and reliability constraints using an adaptive scheme where steps with smaller current are quickly changed whereas steps with larger current are changed slowly. The loop controller of a voltage regulator is modified for controlling not only retention Vmin during a low power state (e.g., C1LP), but also to control fast wake up the low power state (e.g., from C1LP and from C6).

Claims19

Dependent claims

An apparatus comprising:

a plurality of power gates coupled to an input power supply rail and an output power supply rail;
a shifter to generate a control word to control the plurality of power gates;
and
a controller to instruct the shifter when to shift up a value of the control word, shift down the value of the control word, or maintain the value of the control word, wherein the controller is to shift up or shift in non-monotonic manner to reduce error between a reference beat frequency and a beat frequency of a free-running oscillator.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

17/128,076Filed 19 Dec 2020 · us provisional application

Priority

21 Sep 2020

Published

US 2022/0091652 A124 Mar 2022

Granted

11 Jun 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

G06F 1/324
Power saving characterised by the action undertaken: by lowering clock frequency
G06F 1/08
Generating or distributing clock signals or signals derived directly therefrom: clock generators with changeable or programmable clock frequency
G06F 1/12
Generating or distributing clock signals or signals derived directly therefrom: synchronisation of different clock signals provided by a plurality…
G06F 1/3296
Power saving characterised by the action undertaken: by lowering the supply or operating voltage

Unified retention and wake-up clamp apparatus and method

Life of this patent

Unified retention and wake-up clamp apparatus and method

Life of this patent

Abstract

Claims19