| 摘要 |
PROBLEM TO BE SOLVED: To avoid the use of different ICs for each system in the case that pluralities of systems are adopted for one processing. SOLUTION: The integrated circuit that generates an R sound output signal by subtracting an L sound component from an input R sound signal and generates an L sound output signal by subtracting the R sound component from an input L sound signal for stereophonic presence emphasis processing is provided with internal switches SW1-3, and by switching these switches, the circuit configuration consisting of amplifiers 12, 14, 18 and an inverter 16 is rearranged depending on a system used in 1st and 2nd systems. A 1st external circuit 30 used for the 1st system and a 2nd external circuit used for the 2nd system are connected to common terminals 14-16, 3-1. The internal switches SW1-3 are switched to execute each system by using the single IC 10 and it is not required to manufacture separate integrated circuits corresponding to each system. |
