| 摘要 |
PURPOSE:To convert easily to an IC, to obtain an optional frequency characteristic by a resistance and a capacitor which are provided on the outside, and to use only one pin for a pin of the IC for that purpose, by realizing a video equalizing circuit constituted of only a low capacity capacitor and a resistance transistor. CONSTITUTION:A case when a resistance 28 and a capacitor 32 are connected is considered. To connect the resistance 28 and the capacitor 32 to the emitter of a transistor 24 is to vary the gain and a frequency characteristic of a video equalizing circuit. Accordingly, the resistance 28 and the capacitor 32 are provided to the outside so as to be variable, and an amount of overshoot and undershoot, and width of overshoot and undershoot become variable by varying the resistance 28 and the capacitor 32, respectively. Also, as for a pin of an IC, only one pin is used, and constitution of a circuit which is converted to an IC very easily is obtained. |
