US3746774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mandoline effect producing circuit for electronic musical instrument
Assignee: Nippon Gakki Co Ltd
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Filing: 1971-12-21
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Granted: 1973-07-17
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Expires: 1991-12-21
Abstract
Abstract A mandoline effect producing circuit included in an electronic musical instrument, comprising an oscillator for generating a low frequency signal corresponding to the frequency of the tremulous performance of the mandoline, a waveform converter which converts the low-frequency signal to a signal having a waveform repeatedly rising sharply and decaying slowly, an amplitude-modulation circuit which controls the envelope in amplitude of a music tone signal in conformance with the output of the waveform converter, and a tone-color modulation circuit which controls the harmonic components within the music tone signal depending on the same output of the waveform converter, whereby the amplitude and the tone color are varied synchronously.
Inventors
- 👤 T Adachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:22
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; G10H1/04; G10H1/043
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
124 words
In an electronic musical instrument having means for producing a musical tone signal, a mandoline effect producing circuit comprising, a low-frequency oscillator for generating a low frequency signal corresponding to the frequency of the tremulous performance of the mandoline; a waveform converter connected to said oscillator for converting said low frequency signal to a signal output having a waveform repeatedly rising sharply and decaying slowly; an amplitude modulator connected to receive said output signal for controlling an envelope in amplitude of said musical tone signal in conformance with said output of the waveform converter; and a tone-color modulator connected to said waveform converter and amplitude modulator output for controlling harmonic components within the musical tone signal depending on said output of the waveform converter.
Claim 2
Dependent Claim
124 words
In an electronic musical instrument having means for producing a musical tone signal, a mandoline effect producing circuit comprising, a low-frequency oscillator for generating a low frequency signal corresponding to the frequency of the tremulous performance of the mandoline; a waveform converter connected to said oscillator for converting said low frequency signal to a signal output having a waveform repeatedly rising sharply and decaying slowly; an amplitude modulator connected to receive said output signal for controlling an envelope in amplitude of said musical tone signal in conformance with said output of the waveform converter; and a tone-color modulator connected to said waveform converter and amplitude modulator output for controlling harmonic components within the musical tone signal depending on said output of the waveform converter.
Claim 3
Dependent Claim
17 words
A mandoline effect producing circuit as in claim 1 wherein said low-frequency oscillator comprises an astable multivibrator.
Claim 4
Dependent Claim
27 words
A mandoline effect producing circuit as in claim 1 wherein said waveform converter comprises means for differentiating and amplifying the low frequency signal from the low-frequency oscillator.
Claim 5
Dependent Claim
36 words
A mandoline effect producing circuit as in claim 1 wherein said amplitude modulator includes a field effect transistor which varies the degree of modulation in amplitude in accordance with a signal applied to the gate thereof.
Claim 6
Dependent Claim
58 words
A mandoline-effect producing circuit as in claim 1 wherein said tone color modulator includes a capacitor and a field effect transistor constituting a low pass filter, said field effect transistor varying the time constant as a low pass filter in the tone color modulator in accordance with a signal applied to the gate of the field effect transistor.
References Cited (Backward Citations)
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US2756330A
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US2835814A
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US3524376A
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US3493669A
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US3510565A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |