EP 0011921 A1 19800611 - Large scale integrated circuit generator chip for electronic organ.
Title (en)
Large scale integrated circuit generator chip for electronic organ.
Title (de)
Hochintegrierte Generatorschaltung für elektronische Orgel.
Title (fr)
Circuit générateur pour orgue électronique intégré à grande échelle.
Publication
Application
Priority
US 96298178 A 19781122
Abstract (en)
An electronic organ or the like is provided with a plurality of large scale integrated circuit (LSI) chips (10-30), each of which has six tone generators (50) capable of generating a frequency corresponding to any not on the organ. In accordance with a preferred embodiment of the invention a sufficient number of these chips (10-30) is provided so that there is one note generator for each key of the organ. Each chip (10-30) is assigned to one half octave of the keyboard, whereby outputs are in one half octave note groupings. This allows for filtering of the square waves generated to provide a very high quality flute tone.
IPC 1-7
IPC 8 full level
G10H 5/00 (2006.01); G10H 1/32 (2006.01); G10H 5/04 (2006.01)
CPC (source: EP)
Citation (search report)
- US 3794747 A 19740226 - OBAYASHI N
- US 3543281 A 19701124 - BRAND JOHN R, et al
- NL 7904764 A 19791227 - WURLITZER CO
- US 4108038 A 19780822 - AOKI EIICHIRO
- EP 0007700 A1 19800206 - WURLITZER CO [US]
- EP 0006731 A1 19800109 - WURLITZER CO [US]
- US 3943814 A 19760316 - WEMEKAMP HENRY
- MICROELECTRONICS AND RELIABILITY, Vol. 13, No. 5, October 1974, Oxford GB J.D. PENNEY: "MOS and Bipolar IC's in Consumer Applications", pages 379-386. * Page 382, last paragraph- page 383, second paragraph; figure 7 *
Designated contracting state (EPC)
DE GB IT NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 79302241 A 19791017; JP 15193779 A 19791121