| 摘要 |
PURPOSE: To reduce circuit scale by connecting an offset adjustment circuit to the connection point between the resistor and the capacitor of a average value detection circuit for detecting the average value of an input signal in parallel with the average value detection circuit. CONSTITUTION: A resistor 11 and a capacitor 12 for detecting an average value from an input signal is provided at an average value detection part 1. Further, an offset voltage regulating part 2 is connected to a connection point 3 between the resistor 11 and the capacitor 12 at the average value detection part 1 in parallel with the average value detection part 1. An average value detection device can detect the average value from the input signal by the average value detection part 1. Also, the voltage at the connection point 3 can be adjusted by the offset voltage regulating part 2. An individual terminal or wire needs not be provided to place the capacitor 12 and the offset voltage regulating part 2, thus achieving the average value detection device for adjusting an offset generated around the average value detection part 1 with a simple configuration. |
