US3795756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic tremolo effect producing device
Assignee: Nippon Gakki Co Ltd
•
Filing: 1972-09-08
•
Granted: 1974-03-05
•
Expires: 1992-09-08
Abstract
Abstract A tremolo effect producing device, wherein a frequency deviated musical sound signal the frequency of which is shifted higher or lower by as much as an extremely low frequency signal, is tonecolored differently from the tone color of the original signal, and the frequency deviated musical sound signal thus tone-colored and an original musical sound signal are mixed at a predetermined level. The resultant mixed signal presents a repeated change in tone color, which results in a so-called tone color tremolo. A tone coloring circuit for the frequency deviated musical sound signal expediently comprises a filter circuit acting as a filter the value of which changes in response to the level of an extremely low frequency signal applied at a control terminal of the filter circuit.
Inventors
- 👤 S Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:28
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; G10H1/06; G10H1/12; G10H1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
234 words
An electronic tremolo-effect producing device, producing a tremolo effect by mixing a musical sound signal with a frequencydeviated musical signal, comprising: a tone generator to generate musical sound signals; a first tone coloring circuit connected to said tone generator for effecting tone coloring of a selected musical sound signal from said tone generator; a modulating circuit connected to receive the tone-colored selected signal from said first tone coloring circuit and comprising a low frequency oscillator generating a low frequency carrier signal and a modulator connected thereto and giving out a modulated signal; a filter means connected to said modulator for eliminating said low frequency carrier signal from the modulated signal and for giving an output which is selectively deviated on higher and lower sides of the selected signal frequency to the extent of the frequency of said low frequency oscillator; a second tone coloring circit connected to said modulating cirCuit to receive said output from said filter means, said second tone coloring circuit including a variable filter circuit having a control input receiving the low frequency signal, wherein the value of the variable filter circuit varies in response to variations of said low frequency signal; and a signal mixing means connected to said first and second tone coloring circuits to mix at a predetermined level said frequency deviated signal which is tone-colored and said tonecolored selected musical sound signal, to obtain a tremolo effect.
Claim 2
Dependent Claim
234 words
An electronic tremolo-effect producing device, producing a tremolo effect by mixing a musical sound signal with a frequencydeviated musical signal, comprising: a tone generator to generate musical sound signals; a first tone coloring circuit connected to said tone generator for effecting tone coloring of a selected musical sound signal from said tone generator; a modulating circuit connected to receive the tone-colored selected signal from said first tone coloring circuit and comprising a low frequency oscillator generating a low frequency carrier signal and a modulator connected thereto and giving out a modulated signal; a filter means connected to said modulator for eliminating said low frequency carrier signal from the modulated signal and for giving an output which is selectively deviated on higher and lower sides of the selected signal frequency to the extent of the frequency of said low frequency oscillator; a second tone coloring circit connected to said modulating cirCuit to receive said output from said filter means, said second tone coloring circuit including a variable filter circuit having a control input receiving the low frequency signal, wherein the value of the variable filter circuit varies in response to variations of said low frequency signal; and a signal mixing means connected to said first and second tone coloring circuits to mix at a predetermined level said frequency deviated signal which is tone-colored and said tonecolored selected musical sound signal, to obtain a tremolo effect.
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |