Patent ID: 6246772
Filing Date: 2001-06-12
Classification: H04R

Abstract:
A wireless headphone/speakers sound field control system comprising a wireless signal receiver, a left speaker connected to said wireless signal receiver through a left differential amplifier and a left variable resistor, and a right speaker connected to said wireless signal receiver through a right differential amplifier and a right variable resistor, said left variable resistor being connected to the positive pole of said left differential amplifier, said right variable resistor being connected to the positive pole of said right differential amplifier, wherein a phase-shifting circuit is connected between the negative pole of said left differential amplifier and the negative pole of said right differential amplifier, said phase-shifting circuit comprising a first circuit comprised of a first capacitor, a variable resistor, a second capacitor and a resistor, and connected in series between said right variable resistor and the negative pole of said left differential amplifier, and a second circuit comprised of a first capacitor, a variable resistor, a second capacitor, and a resistor connected in series between said left variable resistor and the negative pole of said right differential amplifier, said phase-shifting circuit enabling said differential amplifiers to have a dual signal input, so hat left sound channel signal is inputted into said right differential amplifier and right sound channel signal is inputted into the left differential amplifier to achieve a stereo effect.