Patent ID: 6958638
Filing Date: 2005-10-25
Classification: H03K

Abstract:
1. A slew rate controlling system for output data, said system comprising: a potential difference detecting means to detect a decrease in a potential difference between a first power supply and a second power supply to produce a first signal with specified timing, and to detect an increase in the potential difference between said first power supply and said second power supply to produce a second signal with the specified timing; and a slew rate controlling means to exert, when said first signal is significant, control so as to enlarge a transition speed occurring at time of a fall of output data, and, when said second signal is significant, control so as to enlarge a transition speed occurring at time of a rise of output data, to produce output data, wherein said potential difference detecting means comprises a first signaling means to produce said first signal with said specified timing when the potential difference between said first power supply and said second power supply becomes a preset value or less, and a second signaling means to produce said second signal with the specified timing when the potential difference between said first power supply and said second power supply becomes said preset value or more.