| 摘要 |
PURPOSE:To convert a digital electric signal into an analog acoustic signal by placing a diaphragm where conductor having a width proportional to the weight of each bit and equal length is formed in parallel in a magnetic field in parallel with the diaphragm and orthogonal to the conductor to impress the digital electric signal to each conductor. CONSTITUTION:In the diaphragm 2, the (N-1) unit conductors 3-1-3-(N-1) having a width proportional to the weight of each bit of the electric signal encoded to (N-1)-bit excluding a bit for polarity discrimination and equal length are placed to form on the same plane in parallel. The diaphragm 2 is placed in the magnetic field 5 in parallel with the plane and orthogonal to the conductors 3-1-3-(N-1). Further, the digital electric signal coded by N-bit is impressed to each conductor to transduce directly into an analog acoustic signal. |
