| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a transmission driver circuit capable of appropriately suppressing generation of a common mode voltage even in differential communication where signal transmission speed is fast. <P>SOLUTION: A level hold circuit 3 detects a change in the common mode voltage generated in a transmission line 5 when a communication signal output part 2 changes the voltage level of a differential signal, and holds the detected level. A signal processing circuit 4 compares the detected level with an upper limit reference value and a lower limit reference value, and adjusts an output state of the voltage by the communication signal output part 2 so as to reduce the common mode voltage to be generated at the next signal transmission when the detected level exceeds the upper limit reference value or falls below the lower limit reference value. <P>COPYRIGHT: (C)2012,JPO&INPIT |
