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1. 发明专利

JPS58151712A TOUCH TYPE ELECTRONIC VOLUME CIRCUIT 失效
公开(公告)号：JPS58151712A
公开(公告)日：1983-09-09
申请号：JP3673582
申请日：1982-03-09
申请人： AKAI ELECTRIC
发明人： IKEZAKI YOSHIMI , KIGURE MAKOTO
IPC分类号： H01C10/06 , H01C13/00 , H03G3/00 , H03G3/02
摘要： PURPOSE:To obtain a desired level just by pressing the position of a level scale to be set with a finger, etc. CONSTITUTION:An optional position is pressed with a finger 15 on a level scale 14 provided to a potentiometer 1. Thus the power supply voltage +B of a circuit is applied to both ends of a variable resistor VR at an approximately same moment as a switch S is turned on. As a result, the voltage value obtained by dividing the voltage +B is applied to a leader line 11, i.e., an A/D converting circuit 16. A microcomputer 17 gives just an indication of conversion to the circut 16 in some time elapsed after the switch S is turned on. Thus the circuit 16 converts the divided voltage value into a digital data only when it receives the indication of conversion. This digital data is fed to the computer 17. The computer 17 drives an electronic volume 18 when the reception of the digital data is over and holds this data until the next digital data is supplied. The volume 18 divides the voltage of a signal SG on the basis of the digital data and then delivers value 0.

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