| 摘要 |
PURPOSE: To integrate even a capacitor by conducting a first switch in a shorter period than at most 1/100 of the period of a pulse-shaped control signal by the pulse-shaped control signal. CONSTITUTION: This circuit is provided with a pulse generator 6 connected with an oscillator 5 for generating a periodic control pulse signal extracted from the output signal of the oscillator 5, and switches S2-S6 are conducted only in a period shorter than at least 100 times (a period below 1/100 of) the period of the control pulse signal by this control pulse signal. In this case, resistors R4 and R5 are provided with, for example, a 300kΩ resistance value, and a capacitor C3 has a 45pF capacity. Thus, each element can be integrated, and one part of the same IC as an IC into which the other parts of a circuit to be synchronized (a line synchronizing circuit) are integrated can be formed. |
