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Method for temperature-dependent deactivation of parallel low-voltage circuits

IP.com Disclosure Number: IPCOM000127432D
Publication Date: 2005-Aug-30
Document File: 3 page(s) / 54K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for temperature-dependent deactivation of parallel low-voltage circuits. Benefits include improved functionality and improved power performance.

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Method for temperature-dependent deactivation of parallel low-voltage circuits

Disclosed is a method for temperature-dependent deactivation of parallel low-voltage circuits. Benefits include improved functionality and improved power performance.

Background

              In conventional microprocessors, power consumption is an increasingly important issue. The microprocessor core, which includes the data path, has the greatest power density. To reduce the power consumption of the data path, the supply voltage can be reduced. However, it reduces the performance of the circuit. The conventional solution is to replicate the circuit with reduced supply voltage. The multiple low voltage (

LV

) copies function in parallel.

Description

              The disclosed method is the temperature-dependent deactivation of parallel low-voltage circuits. The method disables some of the parallel instances as temperature increases. The number of instances is set and designed for operation at low temperatures. However, circuits operate at faster speeds at higher temperatures. Not as many instances are required at high temperatures, and some can be deactivated, leading to power savings from reduced leakage. This reduction offsets most of the increased power consumption by the active circuits as the temperature increases. When some of the circuit instances have been deactivated, only the multiplexers/demultixplexers from the working instances are feeding/retrieving data (see Figure 1).

              One implementation of the disclosed method includes a number of instances calculator. Each circuit contains a temperature sensor that detects the ci...