Quotables
"Inventing is a combination of brains and materials. The more brains you use, the less material you need."
Charles Kettering
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7233271 | Noise shaper circuit and method for reducing switching noise Noise that is normally generated during the switching of a noise shaper may be reduced by switching the noise shaper to an inactive or off state after the occurrence of one or more predetermined criteria, for example the detection of a predetermined number of data v... | 06/19/2007 |
| 5157216 | Musical synthesizer system and method using pulsed noise for simulating the noise component of musical tones A music synthesizer simulates the musical tones of bowed string and wind instruments. The synthesizer includes a noise generator which generates pulsed noise signals, as well as a resonant system or signal generator which generates deterministic or period... | 10/20/1992 |
| 4757737 | Whistle synthesizer A whistle synthesizer comprises a microphone, a housing, system electronics within the housing, and controls outside the housing. The player whistles into the microphone, the signals from which are processed to provide an instrument output signal suitable... | 07/19/1988 |
| 4636740 | Control circuit for varying power output of push-pull tube amplifiers A biasing and control circuit for varying the output power delivered by the push-pull output stage of a power amplifier is disclosed. The biasing and control circuit incorporates both fixed and cathode biasing to allow output power to be varied without in... | 01/13/1987 |
| 4358982 | In tone generators for electronic musical instruments A tone generator for electronic musical instruments, useful in particular for the modular composition of an electronic organ, comprising a plurality of inputs corresponding to a keyboard octave of the musical instrument. The inputs are connected to a plur... | 11/16/1982 |
| 4308422 | Circuit for modulating a musical tone signal to produce a rotating effect A device for electronically modulating a musical tone signal to produce substantially the radiation effects produced by a rotary loudspeaker with the aid of two loudspeakers, in which circuit an amplitude modulator is associated with one loudspeaker and a... | 12/29/1981 |
| 4265157 | Synthetic production of sounds A method and apparatus for producing sounds from one or more-time overlapg sequences of one or more electrical pulse signals having a frequency corresponding to the pitch of the sound to be produced from the signals holding the pulse width or pulse pause... | 05/05/1981 |
| 4205579 | Device for producing chorus effects A device for producing a chorus effect for an electronic musical instrument. The device has two sets of parallel time delay modulating circuits with each set having two circuits therein and the circuits being adapted to have the musical tones from the ele... | 06/03/1980 |
| 4181059 | Circuit for simulating sound of wire brush rotated around head of snare drum An electronic musical circuit simulates the sound of a wire brush rotated around the head of a snare drum by differently amplitude modulating and bandpass filtering in separate channels a noise signal derived from a suitable source and summing the modulat... | 01/01/1980 |
| 4175463 | Resonator for a musical tone synthesizer A tone synthesizer in which a musical tone of selected fundamental frequency is generated with a resonance effect at selected harmonics of the tone. The resonance effect is produced by adding an amplitude modulated carrier signal to the musical tone, the ... | 11/27/1979 |
| 4173164 | Electronic musical instrument with frequency modulation of a tone signal with an audible frequency signal An electronic musical instrument comprises first and second voltage-controlled frequency-variable oscillators responsive to application of a pitch determining voltage signal from a keyboard circuit to produce first and second audible frequency signals, re... | 11/06/1979 |
| 4160402 | Music signal conversion apparatus Apparatus for converting the relatively rapid rise time, relatively long fall tone envelopes of a music source output to envelopes having relatively long rise time and relatively rapid fall time and for also varying the frequency of the tone in the nature... | 07/10/1979 |
| 4044643 | Musical instrument circuit providing celeste and vibrato effects A circuit is shown for changing the frequency of a basic keyed oscillator by controlling the amount of keying voltage reaching the oscillator and the circuit used for vibrato. The purpose of this circuit is the achievement of true "pipe organ celeste" eff... | 08/30/1977 |
| 3999456 | Voice keying system for a voice controlled musical instrument A voice keying system for a voice controlled musical instrument comprising a frequency responding circuit for responding to an input signal of audio frequency and generating a control signal which corresponds to each of a plurality of frequency bands of i... | 12/28/1976 |
| 3999149 | Modulation system A modulator for modulating an audio signal in response to a dc signal of adjustable level and concurrently in response to a sub-audio signal, in which the modulating signals do not appear in the output of the modulator nor intermodulate each other, the sy... | 12/21/1976 |
