| 摘要 |
PURPOSE:To use only one system of a control signal between a decoder and an encoder by constituting a level change means with n-set of gain control members and one XY decoder and constituting a position change detection means with an XY matrix switch and n-set of slide means and one XY encoder. CONSTITUTION:The level change means 1 consists of n-set of gain control member VCA1,2-n and an XY decoder 11, a position change detection means 2 consists an XY matrix switch 21, n-set of slide means 12, and an XY encode 23, lines X1-Xn,Y1-Ym are connected to the XY encoder 23 and control signal lines L1,L2 connect the decoder 11 and the encoder 23. In turnings a knob member 22B of the means 22 in the Y axis, m-set of contacts are formed and mn-set of digital signals are generated from the switch 21 by n-set of means 22. The signal is converted into a serial signal, given to the decoder 11 via the liens L1,L2, converted into a parallel signal and given to the members VCA1,2-n. |
