| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the need for an adder circuit in a stereo signal input circuit. SOLUTION: An input circuit comprises: first and second signal terminals for inputting a stereo signal constituted of first and second channels; a first buffer amplifier 11 connected to the first signal terminal; and a second buffer amplifier 12 connected to the second signal terminal, wherein, between an output side terminal of the second buffer amplifier and an input side terminal of the first buffer amplifier, a series circuit of a switching means SW for switching connection and disconnection therebetween and a predetermined resistor R5 is provided. The predetermined resistor appropriately prevents an input level on a first channel side from being reduced while the switching means provides a connected state. COPYRIGHT: (C)2009,JPO&INPIT
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