| 摘要 |
PURPOSE:To remove crosstalk completely with simple circuit constitution by constituting a mixing circuit for displaying a mixing level of output signals from right and left channels by emitter followers connected to an emitter resistor in common. CONSTITUTION:Transistors (TRs) 25, 26 consist of emitter followers connected to an emitter resistor 27 in common and right and left channel signals are inputted to respective bases and mixed by the resistor 27. The mixed signal is applied to an LED driver on the succeeding step through a capacitor 28 and the level is displayed by an LED. If a signal obtained from a terminal 35 is larger than an L signal applied to the base of the TR25, the L signal is not outputted to the output side and only an R signal is obtained from the terminal 35 because the emitter resistor is used in common. Thus, a larger signal level out of the R signal is displayed. |
