Patent ID: 7366312
Filing Date: 2008-04-29
Classification: H04S

Abstract:
1. An artificial stereophonic circuit comprising a left (L) channel and a right (R) channel having a common monophonic signal input terminal with each channel having a separate output terminal, said circuit further comprising a phase-shifting circuit coupled between the signal input terminal and an output terminal of a selected one of the L channel and the R channel, wherein the phase-shifting circuit has an almost equal gain in a full frequency band of an input signal, and a phase shift in the range from 0 to 180 degrees according to an increase in a frequency of the input signal, wherein an amplifier or an attenuator is connected to a line of the L channel or the R channel and a gain difference of 3 dB or more is set between the L channel and the R channel, wherein the phase-shifting circuit is replaced with a phase-shifting circuit having an almost equal gain in a full frequency band of an input signal and serving to carry out a phase shift in the range from 120 to 170 degrees at a frequency of 1 KHz.