| 摘要 |
PURPOSE:To improve the difference in the amplitude of demodulated output by approximating the ratio of the amplitude of limiter output to the standard wave of the output to 1 in respect to the diode limiter circuit used for the SECAM color signal circuit in an image receiving device of a television. CONSTITUTION:Capacitors C3 and C4 are connected in parallel to diodes D1 and D2, which are inserted into the signal pass in series with reverse polarity each other, and the output appearing through capacitors C3 and C4 is added to the output limitted by diodes D1 and D2. Then the value of capacitors C3 and C4 is fixed so that the ratio of the amplitude of the added limiter output to the standard wave of the added limiter output approximates to 1. |
