SIGNAL CHANGEOVER CIRCUIT, SIGNAL CHANGEOVER METHOD, MUTING CIRCUIT, MUTING METHOD AND SIGNAL GENERATING CIRCUIT

摘要

PROBLEM TO BE SOLVED: To prevent click noise from being generated when an output signal is changed over. SOLUTION: Responding to an indication of a changeover indication signal 112 which indicates the selection of a first analog output state 109 or a second analog output state 110, either the first analog output state 109 or the second analog output state 110 is selected. When an indication of the indication signal 112 is changed in an analog signal changeover circuit having a switch 111 for outputting the selected state as an output signal 113, during the period between a time when the indication has been changed and an arbitrary time, a control signal 118 for repeatedly selecting the first analog output state 109 or the second analog output state 110 alternately is generated by a control signal generator 117. Consequently, when the indication of the indication signal 112 is changed responding to the control signal 118, the switch 111 repeatedly selects the first analog output state 109 or the second analog signal output state alternately. COPYRIGHT: (C)2005,JPO&NCIPI