发明名称 |
Keyboard system for an electric musical instrument in which each key is provided with an independent output to a processor |
摘要 |
A keyboard system for an electronic musical instrument includes: a keyboard having a number of keys; a keyboard central processing unit (CPU) coupled to the keyboard; a switch connected to each key on the keyboard; a pull-up resistor serially connected to each switch; a unit for applying voltage to a serial circuit of each switch and each pull-up resistor; and a unit for parallel supplying a signal at an intersection point between each switch and each pull-up resistor to the CPU. The operation states of a plurality of keys can be independently detected by sequentially detecting the potential at the interconnection points.
|
申请公布号 |
US5883327(A) |
申请公布日期 |
1999.03.16 |
申请号 |
US19920988170 |
申请日期 |
1992.12.09 |
申请人 |
YAMAHA CORPORATION |
发明人 |
TERADA, KOSEI;KIKUCHI, KEIGO;KOBAYASHI, MASAHIKO |
分类号 |
G10C3/12;G10H1/053;G10H1/18;G10H1/34;(IPC1-7):G10H5/00;H04Q1/18 |
主分类号 |
G10C3/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|