US3639853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tone oscillator for an electronic musical instrument
Assignee: Individual
•
Filing: 1970-08-21
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Granted: 1972-02-01
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Expires: 1990-08-21
Abstract
Abstract A plurality of frequency dividers are connected in series with an oscillator having a fundamental frequency. The outputs obtained from the frequency dividers are applied to a plurality of L-C oscillating circuits. Each L-C oscillating circuit produces a sinusoidal and a complex output signal which are combined to obtain a musical tone.
Inventors
- 👤 Tadao Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:36
CPC Classifications
G; G10; G10H; G10H5/00; G10H5/10; G10H5/12
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
147 words
A tone generator for an electronic musical instrument, said generator being of the type that includes: 1. a master oscillator; 2. a plurality of serially connected frequency dividers, the input of the first one of said frequency dividers being connected to the output of said master oscillator; and 3. a corresponding plurality of tuned oscillators connected to the respective outputs of said plurality of frequency dividers, the resonant frequency of each of said tuned oscillators corresponding substantially to the output frequency of its associated frequency divider, 4. wherein the improvement comprises means, in each tuned oscillator, for producing a sinusoidal output at said resonant frequency on a first output terminal and a positive-going, rectified, differentiated output at said resonant frequency on a second output terminal, whereby selective combination of the output signals on said first and second output terminals yields a complex musical tone rich in harmonics.
Claim 2
Dependent Claim
147 words
A tone generator for an electronic musical instrument, said generator being of the type that includes: 1. a master oscillator; 2. a plurality of serially connected frequency dividers, the input of the first one of said frequency dividers being connected to the output of said master oscillator; and 3. a corresponding plurality of tuned oscillators connected to the respective outputs of said plurality of frequency dividers, the resonant frequency of each of said tuned oscillators corresponding substantially to the output frequency of its associated frequency divider, 4. wherein the improvement comprises means, in each tuned oscillator, for producing a sinusoidal output at said resonant frequency on a first output terminal and a positive-going, rectified, differentiated output at said resonant frequency on a second output terminal, whereby selective combination of the output signals on said first and second output terminals yields a complex musical tone rich in harmonics.
Claim 3
Dependent Claim
27 words
a plurality of serially connected frequency dividers, the input of the first one of said frequency dividers being connected to the output of said master oscillator; and
Claim 4
Dependent Claim
27 words
a plurality of serially connected frequency dividers, the input of the first one of said frequency dividers being connected to the output of said master oscillator; and
Claim 5
Dependent Claim
11 words
The generator according to claim 1, wherein said producing means includes
Claim 6
Dependent Claim
30 words
a tuned L-C circuit in the collector-base circuit of said transistor, the power supply for said transistor being connected to a tap on the coil of said L-C circuit; and
Claim 7
Dependent Claim
30 words
a tuned L-C circuit in the collector-base circuit of said transistor, the power supply for said transistor being connected to a tap on the coil of said L-C circuit; and
Claim 8
Dependent Claim
28 words
a tuned L-C circuit connected in the base-collector circuit of said transistor, said tuned circuit having a resonant frequency substantially that of the output from said frequency divider;
Claim 9
Dependent Claim
28 words
a tuned L-C circuit connected in the base-collector circuit of said transistor, said tuned circuit having a resonant frequency substantially that of the output from said frequency divider;
Claim 10
Dependent Claim
21 words
means, connected to a tap on the coil of said L-C circuit, for supplying a DC potential to said transistor; oscillate;
Claim 11
Dependent Claim
21 words
means, connected to a tap on the coil of said L-C circuit, for supplying a DC potential to said transistor; oscillate;
Claim 12
Dependent Claim
52 words
means, connected to the base of said transistor, for biasing said transistor to a point just below the point at which said transistor would oscillate, whereby application of an input signal from said frequency divider overcomes said bias and permits said transistor to oscillate and thereby produce said sinusoidal and differentiated outputs.
Claim 13
Dependent Claim
52 words
means, connected to the base of said transistor, for biasing said transistor to a point just below the point at which said transistor would oscillate, whereby application of an input signal from said frequency divider overcomes said bias and permits said transistor to oscillate and thereby produce said sinusoidal and differentiated outputs.
Claim 14
Dependent Claim
11 words
The generator according to claim 1, wherein said producing means includes:
Claim 15
Dependent Claim
37 words
a corresponding plurality of tuned oscillators connected to the respective outputs of said plurality of frequency dividers, the resonant frequency of each of said tuned oscillators corresponding substantially to the output frequency of its associated frequency divider,
Claim 16
Dependent Claim
37 words
a corresponding plurality of tuned oscillators connected to the respective outputs of said plurality of frequency dividers, the resonant frequency of each of said tuned oscillators corresponding substantially to the output frequency of its associated frequency divider,
Claim 17
Dependent Claim
60 words
wherein the improvement comprises means, in each tuned oscillator, for producing a sinusoidal output at said resonant frequency on a first output terminal and a positive-going, rectified, differentiated output at said resonant frequency on a second output terminal, whereby selective combination of the output signals on said first and second output terminals yields a complex musical tone rich in harmonics.
Claim 18
Dependent Claim
60 words
wherein the improvement comprises means, in each tuned oscillator, for producing a sinusoidal output at said resonant frequency on a first output terminal and a positive-going, rectified, differentiated output at said resonant frequency on a second output terminal, whereby selective combination of the output signals on said first and second output terminals yields a complex musical tone rich in harmonics.
Claim 19
Dependent Claim
47 words
a first and a second resistor serially connected between said supplying means and ground, the juncture of said first and second resistors being connected to the base of said transistor to bias said transistor at a point just below the point at which said transistor would oscillate;
Claim 20
Dependent Claim
47 words
a first and a second resistor serially connected between said supplying means and ground, the juncture of said first and second resistors being connected to the base of said transistor to bias said transistor at a point just below the point at which said transistor would oscillate;
Claim 21
Dependent Claim
25 words
an integrating circuit, comprising the series connection of a first capacitor and a third resistor, connected between the output of said frequency divider and ground;
Claim 22
Dependent Claim
25 words
an integrating circuit, comprising the series connection of a first capacitor and a third resistor, connected between the output of said frequency divider and ground;
Claim 23
Dependent Claim
52 words
a fourth resistor connecting the juncture of said third resistor and first capacitor with the juncture of said first and second resistors, to apply a potential to the base of said transistor to overcome said bias, and permit said transistor to oscillate when an output signal is received from said frequency divider;
Claim 24
Dependent Claim
52 words
a fourth resistor connecting the juncture of said third resistor and first capacitor with the juncture of said first and second resistors, to apply a potential to the base of said transistor to overcome said bias, and permit said transistor to oscillate when an output signal is received from said frequency divider;
Claim 25
Dependent Claim
39 words
a second capacitor connected to the collector of said transistor for permitting a first, sinusoidal output signal to be taken from said transistor at a frequency corresponding to the frequency of said output signal from said frequency divider; and
Claim 26
Dependent Claim
39 words
a second capacitor connected to the collector of said transistor for permitting a first, sinusoidal output signal to be taken from said transistor at a frequency corresponding to the frequency of said output signal from said frequency divider; and
Claim 27
Dependent Claim
74 words
a differentiating circuit, comprising a fifth resistor, connected between the emitter of said transistor and ground, and a third capacitor connected to the emitter of said transistor, for permitting a second, rectified output signal to be taken from said transistor, at a frequency corresponding to the frequency of said output signal from said frequency divider, whereby selective mixing of said first and second transistor outputs will yield a complex musical tone rich in harmonics.
Claim 28
Dependent Claim
74 words
a differentiating circuit, comprising a fifth resistor, connected between the emitter of said transistor and ground, and a third capacitor connected to the emitter of said transistor, for permitting a second, rectified output signal to be taken from said transistor, at a frequency corresponding to the frequency of said output signal from said frequency divider, whereby selective mixing of said first and second transistor outputs will yield a complex musical tone rich in harmonics.
References Cited (Backward Citations)
US2777064A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |