| 摘要 |
PURPOSE:To decrease the number of changeover switches corresponding to plural types of tape sources, by providing a switch circuit consisting of two changeover switches and a variable resistor for balance control. CONSTITUTION:When a four-music multiplex sound tape is reproduced, a signal L of a reproducing head 1 is amplified by a reproduction amplifier 3. At the same time, a signal R of a reproducing head 2 is amplified by a reproduction amplifier 4. These amplified signals L and R are impressed to a variable resistor 7 for balance control via changeover switches 5 and 6 respectively. Then a four- music stereo tape is reproduced. In this case, the left and right channel signals L and R are reproduced by the heads 1 and 2 and then impressed to the resistor 7 via the switches 5 and 6 respectively. Then the sounds are delivered through a speaker 10. In such a way, the number of changeover switches can be decreased. |
