US3835409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifier distortion circuit for electric guitars
Assignee: Individual
•
Filing: 1973-09-25
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Granted: 1974-09-10
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Expires: 1993-09-25
Abstract
Abstract An amplifier for use with electric guitars for amplifying an electrical signal for application to a loudspeaker includes means for introducing crossover distortion in proportion to the amplitude of the electrical signal.
Inventors
- 👤 W Laub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:18
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/30; H03F3/3083; H03F3/3086; H03F3/3091; H03F1/00; H03F1/32; H03F1/3241; H03F1/3264; H03F1/327; H03F1/3276
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
77 words
In a transistor amplifier having an output terminal and a pair of output transistors of opposite conductivity type connected to alternately supply output signals to said output terminal, a circuit for introducing crossover distortion increasingly as a function of the amplitude of the output signal comprising a capacitor connected between the inputs of the two output transistors, and means for charging the capacitor increasingly at a rate as a function of the amplitude of the output signals.
Claim 2
Dependent Claim
77 words
In a transistor amplifier having an output terminal and a pair of output transistors of opposite conductivity type connected to alternately supply output signals to said output terminal, a circuit for introducing crossover distortion increasingly as a function of the amplitude of the output signal comprising a capacitor connected between the inputs of the two output transistors, and means for charging the capacitor increasingly at a rate as a function of the amplitude of the output signals.
Claim 3
Dependent Claim
19 words
Apparatus according to claim 1, wherein said charging circuit comprises a series circuit including a resistor and a diode.
Claim 4
Dependent Claim
55 words
Apparatus according to claim 1, including an output transformer having its primary connected to said output terminal, and means for connecting the secondary of said transformer with the input terminals of said output transistors to establish a bias voltage therebetween which increases as a function of the amplitude of the signal present at said secondary.
Claim 5
Dependent Claim
22 words
Apparatus according to claim 3, wherein said charging circuit includes a series connected resistor and diode interconnecting said capacitor with said secondary.
Claim 6
Dependent Claim
59 words
Apparatus according to claim 1, including a circuit for establishing a quiescent bias level for said output transistors, said circuit inCluding means for generating a quiescent potential difference between the inputs of said two output transistors, whereby the offset distortion produced by said amplifier is substantially reduced for low level and increased for higher signals applied to said inputs.
References Cited (Backward Citations)
CA651354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |