| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent generation of noise when an input signal is zero, and synchronize two pulse width modulation signals without using an external clock. <P>SOLUTION: A first monostable multivibrator charges a capacitor Ca with a first charging current in response to a high level of a clock signal and stops the charging when a charging voltage reaches a threshold voltage, and outputs a first pulse signal in accordance with the charging action. A second monostable multivibrator charges a capacitor Cb with a second charging current in response to the high level of the clock signal and stops the charging when a charging voltage reaches the threshold voltage, and outputs a second pulse signal in accordance with the charging action. A clock signal generating monostable multivibrator charges a capacitor Cc with the second charging current in response to a low level of the first pulse signal and stops the charging when a charging voltage reaches the threshold voltage, and outputs the clock signal in accordance with the charging action. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
