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US 5,333,203 AGranted
Reverb and selectable tremolo and vibrato electron tube preamplifier
OwnerCesar Diazinventor
Life of this patent
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Abstract
A preamplifier device employing electron tubes wherein the preamplifier has tremolo/vibrato circuits independent from reverb circuits allowing continuously variable control of either tremolo or vibrato effects simultaneous with continuously variable control of the reverb effect. A mixer control for controlling the level of reverb and a tone control is provided. Connections are provided for external switches used to disable any one of the above effects.
Claims17
An electron tube preamplifier for conditioning an input audio signal comprising:
- means for producing a reverb effect upon the input audio signal thus creating a reverb effect output signal;
- a means for modulating said input audio signal and said reverb effect output signal such that said reverb effect and a selected effect that is one of a tremolo effect and a vibrato effect is imposed upon a modulated output signal;
- selection means for permitting said means for modulating to impose one of said tremolo and said vibrato effects upon said input audio signal independently of said reverb effect in said modulated output signal;
- means for receiving the input audio signal and applying it to both said means for producing a reverb effect and said means for modulating;
- and
- said means for modulating including a control means for providing said modulated output signal with a selectable amount of said reverb effect.
3 more elements
An electron tube preamplifier for conditioning an input audio signal comprising:
- reverb means for producing a reverb effect upon the input audio signal thus creating a reverb effect output signal;
- and
- said reverb means including a reverb tank having an output at which said reverb effect output signal is produced and a variable gain amplifier circuit for driving an input of said reverb tank;
- said variable gain amplifier having a gain adjustment for setting a level of dwell of said reverb effect;
- means for independently receiving and modulating said input audio signal and said reverb effect output signal such that said reverb effect and a selected effect that is one of a tremolo effect and a vibrato effect is imposed upon a modulated output signal:
- said means for modulating including a controllable resistance responsive to an oscillator output signal;
- said controllable resistance having a resistance range adjustment for varying a depth of said tremolo and said vibrato effects;
- said means for modulating including a modulation circuit responsive to said oscillator output signal via said controllable resistance;
- said means for modulating being such that said modulated output signal contains an amount of said reverb effect;
- and
- means for receiving the input audio signal and applying it to both said means for producing a reverb effect and said means for modulating.
8 more elements
An electron tube preamplifier for conditioning an input audio signal comprising:
- means for modulating the input audio signal such that a selected effect that is one of a first effect and a second effect is imposed upon a modulated output signal;
- said means for modulating including an oscillator circuit and a modulation circuit responsive to an oscillator output signal, of the oscillator circuit, and having a switch for selecting one of the first and the second effects;
- said modulation circuit imposing a selected effect, of the first effect and the second effect, upon the modulated output signal;
- said modulation circuit including a tremolo circuit having a manually variable tone control circuit with resistive loading responsive to said oscillator output signal;
- said modulation circuit including a vibrato circuit, parallel to said tremolo circuit, producing a vibrato effect via capacitive loading responsive to said oscillator output signal and operating independently of a setting of said tone control circuit;
- and
- means for receiving the input audio signal and applying it to the means for modulating.
4 more elements
Dependencies are inferred from the claim text.