Patent ID: 6593809
Filing Date: 2003-07-15
Classification: H04R,H04S

Abstract:
A circuit for widening the stereo base in the reproduction of stereophonic sound signals, comprising:a first amplifier (10) with a non-inverting input (16), an inverting input (18) and an output (20); a second amplifier (34) with a non-inverting input (36), an inverting input (42) and an output (40); right-hand channel signals being applied to the non-inverting input of the first amplifier and the output of the first amplifier being fed back to its inverting input through a first resistor (R1); left-hand channel signals being applied to the non-inverting input of the second amplifier and the output of the second amplifier being fed back to its inverting input through a second resistor (R5); further comprising a first buffer amplifier (50) with a non-inverting input (54), an inverting input (58) and an output (62) connected to the inverting input; and a second buffer (48) amplifier with a non-inverting input (52), an inverting input (56) and an output (60) connected to the inverting input; the first buffer amplifier having its output connected to the inverting input of the first amplifier through a third resistor (R9) and its non-inverting connected to the inverting input of the second amplifier; and the second buffer amplifier having its output connected to the inverting input of the second amplifier through a fourth resistor (R8) and its non-inverting connected to the inverting input of the first amplifier.