| 摘要 |
PURPOSE:To save the number of components, to simplify the circuit constitution and to attain the same listening sense correction as that by a conventional active filter circuit by providing an RC filter circuit a low frequency component of left/right audio signals properly between right and left channel signal lines. CONSTITUTION:A stereo listening sense correction circuit 1 is provided between a preamplifier 2 having a couple of operational amplifiers 2L, 2R of pre-stage amplifying individually left/right channel audio signals L, R and a variable resistor 3 having a couple of left/right channel use variable resistors 3L, 3R. An RC filter circuit 15 of comparatively simple constitution passing properly a low frequency component of left and right audio signals is provided between right channel signal lines 10R and a left channel signal line 10L in the stereo listening sense correction circuit 1. Thus, the number of components is less, the circuit constitution is simplified and the same stereo listening sense correction as that for a conventional active filter is attained. |
