Patent ID: 8036413

Claim:
In a remote controller for an audio apparatus which comprises a microphone driving unit ( 40 ) which operates in accordance with an operation of a main power switch ( 80 ) and drives a microphone ( 1 ) which receives a user's voice; a microphone volume switch ( 42 ) which is connected with an output side of the microphone driving unit ( 40 ) for adjusting sound inputted from the microphone ( 1 ); an input voice amplifier ( 30 ) which is connected with an output side of the microphone volume switch ( 42 ) and has a voice IC ( 31 ) for amplifying a voice signal inputted from the microphone ( 1 ); a music volume switch ( 90 ) which adjusts an output sound inputted through an input plug of the audio apparatus connected with an output side of the input voice amplifier ( 30 ); a voice mixer ( 70 ) which includes two resistors (R 2 ) and (R 3 ) between the input plug ( 11 ) and a speaker ( 2 ) and allows an output sound of the audio apparatus to impedance-match with respect to the speaker ( 2 ) and outputs a voice signal inputted through the microphone ( 1 ) and an output sound of the audio apparatus through different paths; and a power amplifier ( 60 ) which amplifies current supplied from the power unit ( 61 ) in accordance with an operation of the main power switch ( 80 ), a remote controller having an echo function, comprising: an echo circuit ( 50 ) which includes an echo IC ( 51 ) and an echo volume switch ( 52 ), with the echo IC ( 51 ) being designed to amplify and circulate voice signals for generating echo, and with the echo circuit ( 50 ) being connected with the microphone driving unit ( 40 ), the voice amplifier ( 30 ) and the mixer circuit ( 70 ), respectively.