LOGIC CIRCUIT SYSTEM AND METHOD OF CHANGING OPERATING VOLTAGE OF A PROGRAMMABLE LOGIC CIRCUIT

• Main Authors: KANNO SHINICHI, TARUI MASAYA, OONEDA TAKU, MIYAMOTO YUKIMASA
• Format: Patent
• Language: English
• Published: 17.01.2008
• Subjects: BASIC ELECTRIC ELEMENTS; BASIC ELECTRONIC CIRCUITRY; CALCULATING; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION ANDCOMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION ANDCOMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWNENERGY USE; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; PHYSICS; PULSE TECHNIQUE; SEMICONDUCTOR DEVICES; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

A logic circuit system with power consumption that is reduced by automatically varying the clock frequency and operating voltage according to processing capability imposed on programmable logic circuits. The programmable logic circuits are capable of achieving plural circuit functions dynamically and can change realized circuit functions during operation. In addition, the system has a voltage supply portion for supplying a voltage to the programmable logic circuits, a clock signal supply portion for supplying a clock signal to the programmable logic circuits, a change control portion for changing the circuit functions realized by the programmable logic circuits to any one of the circuit functions, an operation time measuring portion for measuring the operation times of the programmable logic circuits to perform processing to achieve the circuit functions, respectively, and a clock-and-voltage determination portion for determining the frequency of the clock signal and the voltage, using the operation times.