| 摘要 |
PURPOSE:To attain switching of signals among tape recorders of >=3 systems by using an interlocking switch circuit which grounds the output of the signal selected by the 1st changeover switch only when said signal is equal to the reproduced signal of the same tape recorder or to the record monitor signal. CONSTITUTION:A switch 12 selects an optional one of reproduction inputs 1-3 as well as a signal source after the signal source input is switched by a switch 11. The selected output is delivered as a sound record output via impedance elements 14-16 respectively, and at the same time the output signal is grounded by a switch 13. These switches 13 and 12 are interlocked each other and switched at a position (b). As a result, the record and reproduction signals of the same tape recorder are amplified circularly by the 2nd switch circuit interlocking the switching of input signals even in the case of a connection among tape recorders of three systems. This prevents a fault of the oscillation, etc. |
