公开(公告)号：US3569604A

公开(公告)日：1971-03-09

申请号：US3569604D

申请日：1965-05-12

申请人： WURLITZER CO

发明人： SCHWARTZ HAROLD O ,  MACHANIAN WILLIAM V ,  BARRY ROBERT D ,  BARBAS RICHARD E

IPC分类号： G10H1/02 ,  G10H1/053 ,  G10H5/10

CPC分类号： G10H1/053 ,  G10H1/02 ,  Y10S84/23

摘要： An electronic musical instrument, such as an organ, utilizing a plurality of constantly operating square wave generators, with the generators connected to utilization circuits by means of diodes which are normally biased off. Potential is switched selectively to the diodes upon closure of key switches to play the various tones. Diodes are shared in order that two diodes might be in series between each tone generator and utilization circuit for maximum isolation, while conserving the total number of diodes necessary. The diodes are supplied with potential through circuits which serve as integrating circuits for the square waves, whereby to round off the attack to produce or lead toward sawtooth wave shapes. Groups of diodes also are provided with are switched on simultaneously, and are connected to previously mentioned diodes for playing preselected groups of notes simultaneously to simulate a chimes effect.