| 摘要 |
PURPOSE:To cancel the fixed delay section given with the non-crystal variable delay line, by operating the first and second delay control means in complementary manner according to the delay control signal. CONSTITUTION:Sequentially, the terminals 12 to 13 of the non-crystal magnetic line, is provided with the first output electroaccoustic converter 14, first delay control winding 17, first input audio converter 15, second delay control winding 18, and second output electroaccoustic converter 16 and the first and second delay control windings 17 and 18 are connected in series each other, Then, the direction of sound wave propagation for them and the direction of the bias magnetic field for them are in the same for one and opposite to the other. The magnet 19 causes up and down of the line representing the delay in the terminals 10 and 11, and the advance or delay signal for the delay can suitably be obtained. |
