Patent 7164289 was granted and assigned to Altera on January, 2007 by the United States Patent and Trademark Office.
Memory performance in programmable logic is significantly increased by adjusting circuitry operation to adjust for variations in process, voltage, or temperature. A calibration circuit adjusts control signal timing, dynamically and automatically, to compensate real time to process, voltage, and temperature variation. A feedback system using a control block and a dummy mimicking concept are provided.