US3735012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated circuit frequency dividers in electronic musical instrument
Assignee: Nippon Gakki Co Ltd
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Filing: 1971-02-22
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Granted: 1973-05-22
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Expires: 1991-02-22
Abstract
Abstract In an electronic musical instrument, the frequency dividers for the tone generators consist of integrated circuit units connected in cascade. Each unit includes a plurality of independent flipflops in a number representing a divisor (six, four, three or two) of twelve, the corresponding number of input terminals aligned on one side of the unit and the corresponding number of output terminals aligned on the opposite side thereof. The units are connected in cascade one after another with every flip-flop in one unit dealing with different tone name signal in an octave and the corresponding flip-flops in separate units constituting a divider chain for the same-named tones. Inter-unit wirings become very simple.
Inventors
- 👤 K Hirano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:26
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/32; G10H5/00; G10H5/02; G10H5/06; Y; Y10; Y10S; Y10S84/00; Y10S84/11
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
131 words
An assembly of frequency dividers in an electronic musical instrument, comprising a plurality of integrated circuit units connected in cascade, each unit including a plurality of independent flip-flops in a number which is exactly divisiable into twelve, each flip-flop having a trigger point and an output point, the corresponding number of input terminals each connected to each of said trigger points and aligned on one side of the unit, and the corresponding number of output terminals each connected to each of said output points and aligned on the opposite side thereof, said units being connected in cascade one after another with every flip-flop in one unit dealing with a different tone name signal in an octave and the corresponding flip-flops in separate units constituting a divider chain for the same-named tones.
Claim 2
Dependent Claim
131 words
An assembly of frequency dividers in an electronic musical instrument, comprising a plurality of integrated circuit units connected in cascade, each unit including a plurality of independent flip-flops in a number which is exactly divisiable into twelve, each flip-flop having a trigger point and an output point, the corresponding number of input terminals each connected to each of said trigger points and aligned on one side of the unit, and the corresponding number of output terminals each connected to each of said output points and aligned on the opposite side thereof, said units being connected in cascade one after another with every flip-flop in one unit dealing with a different tone name signal in an octave and the corresponding flip-flops in separate units constituting a divider chain for the same-named tones.
Claim 3
Dependent Claim
20 words
The frequency divider assembly according to claim 1 wherein the integrated circuit unit are formed on a dual-in-line type package.
Claim 4
Dependent Claim
20 words
The frequency divider assembly according to claim 1 wherein the integrated circuit unit are mounted on a can-sealed type package.
Claim 5
Dependent Claim
19 words
The frequency divider assembly according to claim 1 wherein the integrated circuit unit is provided with six flip-flop circuits.
Claim 6
Dependent Claim
19 words
The frequency divider assembly according to claim 1 wherein the integrated circuit unit is provided with four flip-flop circuits.
Claim 7
Dependent Claim
19 words
The frequency divider assembly according to claim 1 wherein the integrated circuit unit is provided with three flip-flop circuits.
Claim 8
Dependent Claim
19 words
The frequency divider assembly according to claim 1 wherein the integrated circuit unit is provided with two flip-flop circuits.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |