| 摘要 |
PURPOSE:To make automatic fade-in and fade-out possible by using a microcomputer. CONSTITUTION:Microcomputer 9 supplied with a signal from synchronizing signal generator 4 and that from encoder 5 to generate a correction signal for white balance adjustment, etc., which is supplied to encoder 5. Further a random voltage from volume 10 for fade time setting is supplied to comparing circuit 11. Simultaneously, the 1st memory contents of RAM93 of computer 9 are supplied to D/A converting circuit 12 and converted there into an analog signal, which is supplied to comparing circuit 11. Next, the contents of the 2nd memory address are supplied to gain control circuit 6 by way of D/A converter 12 and sample holding circuit 13. A voltage applied to gain control circuit 6 is sequentially increased or decreased by the output of computer 9. |
