| 摘要 |
PURPOSE:To improve the distortion factor without deteriorating signal to noise ratio, by distributing modulation signal into a plurality of equal levels and outputting them with addition after demodulation at respective switching circuit. CONSTITUTION:When a synthesized wave signal ei is fed to an input terminal 1, it is amplified at a buffer amplifier 5 having N2 times the amplification factor in response to the number of distribution of a distributor 6, it is equally divided into N, and switching is made by being fed to N sets of switching circuits 21-2N. The right and left audio signals SR, SL demodulated at the output side of N sets of switching circuits 21-2N are expressed with a power series, then the output from adders 7a, 7b is the power series. Thus, the signal to noise ratio for the left and right audio signals can be improved to higher distortion factor independently of the number of switching circuits. |
