Musical scale generating circuit
US4699518A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 11, 1986 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | Sep 11, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H2230/351
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A musical scale generating circuit comprises an oscillator, a programmable frequency divider for frequency-dividing an output signal from the oscillator, a tone generating circuit for generating a tone, and a frequency dividing ratio data output circuit for successively outputting frequency dividing ratio data determinative of a plurality of frequency dividing ratios of the programmable frequency divider. A frequency dividing ratio discriminating circuit detects whether a frequency dividing ratio necessary for outputting a desired scale frequency is an odd or even number. A frequency dividing ratio correcting circuit is operative to add one to or substract one from frequency dividing ratio data, when a frequency dividing ratio is detected to be an odd numbered frequency dividing ratio and applies corrected frequency dividing ratio to the programmable frequency divider. A one-half frequency divider further divides a signal from the programmable frequency divider by two.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.