Method and circuitry for digital-analog frequency generation
US4073209A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 1976 |
| Grant date | Feb 14, 1978 |
| Priority date | — |
| Expiry date | Apr 9, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H5/002
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A method and circuitry for frequency generation, especially for electronic organs, in which a digital signal is developed by the actuation of an element such as a key of an organ keyboard. The digital signal is converted to a respective voltage signal and the voltage signal is employed to control a voltage controlled oscillator which supplies a signal corresponding in frequency to the actuation of the aforesaid element. An organ provided with a system for frequency generation according to the present invention can be operated monophonically or polyphonically and is capable of producing desirable effects, including celeste and portamento effects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.