Audio oscillator - Factbites

Audio oscillator - Factbites
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Topic: Audio oscillator

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	The Crystodyne Principle (1924)
		The crystal may be made to oscillate first by the method explained previously; that is, by listening in the phones when it oscillates at audio frequency, then by means of switches the circuit of Fig.
		Once the crystal oscillates at audio frequency, it is easy to replace the audio frequency circuit by one of radio frequency so as to have the contact functioning in the ordinary heterodyne manner.
		L2C2 is the audio frequency oscillating circuit while L1C1 is the radio frequency circuit.
	earlyradiohistory.us /1924cry.htm (1360 words)

	VirtualDub Sync
		For short sequence capturing, that does not matter because this effect becomes visible only when recording some longer periods (depends on the quality of the soundcard-oscillator and on the oscillator(s) in the tv-broadcast-station or in your VCR).
		In order to syncronize audio and video, all capture programs we know (Virtualdub, AVI_IO, etc.) throw away or duplicate frames when audio is behind or in front of video.
		For better operation set the audio block size to a smaller value e.g.
	www.student.uni-kl.de /~dittrich/sync (1360 words)

	regenerative radio receivers
		The audio stage IC1 amplifies the audio signal and provides enough output to drive headphones or a small speaker.
		A bipolar transistor is used in the radio frequency stage, a JFET in the detector and the audio amplifier uses a low-cost IC.
		When oscillating, the detector heterodynes (mixes) its local oscillation with those of the signal to provide an audio "beat note".
	www.electronics-tutorials.com /receivers/regen-radio-receiver.htm (1360 words)

	rs80 low freq oscillator
		It is therefore vital that, just like a primary audio oscillator, the RS80 exhibits pitch stability, waveform accuracy, and a lack of unwanted noise and/or distortion.
		They can add vibrato to a sound, produce growl, act as low frequency clocks and, on some synthesisers, double as audio frequency oscillators.
		The RS80 can, therefore, be used in three ways: as a low frequency modulator; as an audio frequency modulator; and as a secondary sound source.
	www.analogue.org /network/rs80.htm (1360 words)

	Articles - Signal generator
		Modern software synthesis environments such as Csound have generalized the oscillator as a type of unit generator (UG), where UGs are primitive modules that produce, modify or acquire audio or control signals.
		If the oscillator operates above the audio frequency range (>20 kHz), the generator will often include some sort of modulation function such as amplitude modulation (AM), frequency modulation (FM), or phase modulation (PM) as well as a second oscillator that provides an audio frequency modulation waveform.
		With analog synthesizers, they are realized with voltage-controlled oscillators and with digital or software synthesizers they are generated algorithmically.
	www.sinoz.com /articles/Signal_generator (199 words)

	Transmitter - Wikipedia, the free encyclopedia
		In broadcasting, the part which contains the oscillator, modulator, and sometimes audio processor, is called the exciter.
		audio (AF), intermediate frequency (IF) and radio frequency (RF).
		A transmitter usually has a power supply, an oscillator, a
	en.wikipedia.org /wiki/Transmitter (199 words)

	Lindsay's Technical Archive: Armstrong Super Regeneration
		The amount of energy developed by the oscillator at the variation frequency, however, is sufficient to completely paralyze an audio amplifier if impressed on its grid, and a low-pass filter is necessary between the detector-oscillator and the amplifier to keep out the 12,000-cycle component and yet pass the signal frequency.
		This is a two-tube circuit plus an extra amplifier, the first tube being the regenerative amplifier, the second acting both as oscillator and as detector, and the third as an ordinary audio amplifier.
		The oscillator is tuned in both circuits to a super-audible frequency and to attain this has a 1250 turn duo-lateral coil shunted by a mica condenser of.0025 mfds in its grid circuit, and a DL-1500 in its plate circuit.
	www.lindsaybks.com /arch/sreg (1642 words)

	EXPLORING ANALOGUE
		Putting low frequency control to one side for the moment, the use of audio oscillators for control purposes means that you can modulate another device while the modulating oscillator is operating in the audio frequency range.
		Oscillator sync was introduced so that you could mix several oscillators without this problem.
		Oscillator sync is created where two oscillators can be phase-locked together.
	www.sospubs.co.uk /sos/1994_articles/jun94/analogue.html (1642 words)

	Moog MF102 Guitar Effects FREE SHIPPING
		A ring modulator mixes your audio input signal with a carrier oscillator to produce sum and difference frequencies.
		A ring modulator produces sum and difference frequencies between the audio input and a “carrier” oscillator.
		Imagine that the ring modulator's carrier oscillator is producing a 500 Hz sine wave, and your input signal is a 100 Hz sine wave.
	www.music123.com /Moog-MF102-i91047.music?t=4 (558 words)

	Voltage Controlled Oscillator With Wave Shaping
		This is particularly useful when using an RS90 as a 'sync' oscillator because it then becomes harmonically unrelated to the audio oscillator, thus generating a different timbre on each note that you play.
		Most audio frequency oscillators generate a range of periodic waveforms.
		The RS90 offers oscillator 'sync' which allows you to re-initialise the waveform by applying a second waveform at the sync input.
	www.analoguesystems.co.uk /modules/rs90.htm (558 words)

	Lindsay's Technical Archive: Armstrong Super Regeneration
		The amount of energy developed by the oscillator at the variation frequency, however, is sufficient to completely paralyze an audio amplifier if impressed on its grid, and a low-pass filter is necessary between the detector-oscillator and the amplifier to keep out the 12,000-cycle component and yet pass the signal frequency.
		This is a two-tube circuit plus an extra amplifier, the first tube being the regenerative amplifier, the second acting both as oscillator and as detector, and the third as an ordinary audio amplifier.
		Armstrong, when "gotten onto," make the operation of a super-regenerative set as easy as the ordinary regenerative circuit with which we are all familiar.
	www.lindsaybks.com /arch/sreg (558 words)

	tetrode -- Britannica Concise Encyclopedia - The online encyclopedia you can trust!
		It has been used as an amplifier for both audio and radio signals, as an oscillator, and in electronic circuits.
		A special form of tetrode was the dynatron, a vacuum tube that was operated with screen-grid voltage higher than plate voltage so that the tube exhibited negative resistance (i.e., plate current decreased when plate voltage increased), a useful characteristic in oscillator circuits.
		Currently, small glass triodes are used primarily in low-distortion audio amplifiers, while larger triodes, made of...
	www.britannica.com /ebc/article-9071864 (454 words)

	Pavek Theremin Page
		Bringing the hand close to the rod will increase the capacity in the pitch control circuit, reduce the frequency of the variable pitch oscillator and increase the difference between the frequency of this oscillator and the fixed pitch oscillator.
		The amount of the difference is dependent on the frequency of the variable pitch oscillator the frequency of which is determined by the position of the hand in relation to the pitch control rods The frequency of the fixed pitch oscillator does not change while playing.
		This circuit oscillates at a frequency, when correctly adjusted, at a maximum of 1400 cycles greater than the variable pitch oscillator.
	www.pavekmuseum.org /theremin/theop.html (454 words)

	Beat frequency oscillator - Wikipedia, the free encyclopedia
		A beat frequency oscillator or BFO in radio telegraphy, is a dedicated oscillator used to create an audio frequency signal for carrier wave transmissions to make them audible, as they are not broadcast as such.
		intermediate frequency signal to create an audio frequency signal.
		This page was last modified 08:43, 7 Mar 2004.
	en.wikipedia.org /wiki/Beat_frequency_oscillator (454 words)

	309spec
		This course covers a variety of basic RF oscillators, audio oscillators, waveshape generators, and basic AM and FM modulators.
		Uses AND circuits to divide the 4 MHz oscillator down to the audio frequency range
		Monostable oscillator circuit triggered by an astable oscillator circuit
	www.omgsic.com /309spec.htm (220 words)

	Radio - Wikipedia, the free encyclopedia
		A receiver with a local oscillator would "heterodyne" with the pure radio frequency, creating a whistle-like audio tone.
		The next advance was continuous wave telegraphy, or CW, in which a pure radio frequency, produced by a vacuum tube electronic oscillator was switched on and off by a key.
		This can be transformed into audio or other signals that carry information.
	phatnav.com /wiki/wiki.phtml?title=Radio (220 words)

	Morse Code/Alarm Oscillator
		This circuit is an audio oscillator based on the LM386 audio amplifier.
		It can be used in two different modes of operation: "Code" or "Alarm".
	www.escience.ca /circuitT/RENDER/0001/C9/3043/10856.html (220 words)

	Krohn-Hite Model 4402B Ultra-Low Distortion RC Oscillator
		The Model 4402B is an ultra-pure sinewave, stable amplitude oscillator designed to meet the needs of today’s high precision 16 to 18 bit A/D converter testing, and audio test and measurement technology.
		Covering the frequency range from 1Hz to 110kHz, with precise 3 digit frequency tuning, the 4402B produces a virtually “distortion-free” (<0.0005%) sinewave for measuring A/D converter accuracy, audio preamplifier and power amplifier harmonic distortion.
		Model 1200A : Sweep/Function Generator - 0.2Hz to 3MHz
	www.krohn-hite.com /htm/sources/mod4402b.htm (220 words)

	Wein Bridge Oscillator - Top Wein Bridge Oscillator Sites, Reviews and Information
		Audio Oscillator Test but the one almost universally used for audio Bridge analysis is the Wien work (also called Wein Bridge).
		Oscillator" Wave "Sine File Format: PDF Adobe Acrobat View as HTMLYour function reader may not have a PDF browser available.
		circuit is of frequency as a Wein bridge oscillator.
	www.justoscillators.com /listings122.html (220 words)

	Wien Bridge Oscillator
		The oscillator is the usual Wien bridge design with a dual audio taper 100K pot for adjustment, the pot sections are in series with 10K resistors (giving a 10X range per setting).
		I have built a Wien Bridge Oscillator/Audio Signal Generator but am having problems with spurious operation at some frequencies and hope that someone can give me some advice.
		Also, the oscillator holds good amplitude regulation across all ranges (except where unstable) except that it "wobbles" a little each time the dial is adjusted.
	www.kkn.net /archives/cgi-bin/mesg.cgi?a=QRP-L&i=19990811165917.21715.qmail@hotmail.com (220 words)

	Digitally controlled oscillator
		Develops, manufactures and markets digitally controlled audio mixing consoles and accessories for use in production of audio content for music, post production for film and television, broadcast, live sound reinforcement and multimedia world-wide markets.
		Manufacturer of broadband digital splitters, amplifiers, oscillator and power blocking, locking terminators for catv, matv and smatv.
		Digitally capturing the sights, sounds and slides of meetings, seminars and symposia.
	www.omniknow.com /common/wiki.php?in=en&term=Digitally_controlled_oscillator (220 words)

	heath2.htm
		Special features include a multi-sextion hermetically sealed filter to shape audio response for excellent sideband suppression, dual conversion heterodyne circuitry with high frequency oscillators crystal controlled and automatic level control for greater talk power without distortion.
		It uses a 12BE6 oscillator and mixer, a 12BA6 IF amplifier/beat frequency oscillator, a 12AV6 second detector, AVC, first audio amplifier and a 50C5 beam power output tube.
		Frequency stability: Overall frequency within 100 CPS after warmup.
	www.aade.com /hampedia/heath/heath2.htm (220 words)

	Beat Frequency Oscillator - Top Beat Frequency Oscillator Sites, Reviews and Information
		beat frequency oscillator: Information From Answers.com beat frequency oscillator A beat a oscillator or BFO in analysis radio telegraphy, is frequency dedicated oscillator used phase to create an audio frequency signal.
		BEAT R7077 OSCILLATOR FREQUENCY The Beat Frequency Oscillator (BFO) is an audio oscillator function made by AWA (Amalgamated Wireless Australia) in 1943.
		Early Electric Bliley Patents: 2240452 4 is a schematic diagram of a beat frequency frequency oscillator and Fig.
	www.justoscillators.com /listings11.html (220 words)

	oscillator - a Whatis.com definition
		Electronic oscillators are used to generate signals in computers, wireless receivers and transmitters, and audio-frequency equipment, particularly music synthesizers.
		An oscillator is a mechanical or electronic device that works on the principles of oscillation: a periodic fluctuation between two things based on changes in energy.
		There are many types of electronic oscillators, but they all operate according to the same basic principle: an oscillator always employs a sensitive amplifier whose output is fed back to the input in phase.
	whatis.techtarget.com /definition/0,,sid9_gci212723,00.html (220 words)

	electronics
		The transistors used are wired in a reversed biased fashion thus behaving as oscillators.
		wo low voltage, low power zeners are used to control electronically the level of an audio signal.
		The attenuation range is from 6 to 58dB for an input current from 0.042 to 77mA corresponding to a control voltage from 2.7 to 7.5V.
	www.geocities.com /CapeCanaveral/Lab/5185/electronics.html (220 words)

	Hewlett-Packard - the free encyclopedia
		Their first product was a precision audio oscillator, the Model 200A.
		Their innovation was the use of a light bulb as a temperature stabilized resistor in a criticalportion of the circuit.
		HP was founded in 1939 by BillHewlett and Dave Packard, who had both graduated from Stanford University in 1934, asa manufacturer of test and measurement instruments.
	www.encyclopedia-of-knowledge.com /?t=HP (220 words)

	Oscilator - Electronic music webzine netlabel radio show mp3 download electro electroclash dubtech dubhouse idm interviews reviews CA @ Knitting Factory w/ Existereo, Benyomen More
		Oscillators are found in computers, wireless receivers and transmitters, and audio-frequency equipment, particularly music synthesizers.
		Oscillator circuits An oscillator is an electronic device used for the purpose of generating a signal frequency equipment, and music synthesizers.
		Damping Coefficient When a damped oscillator is subject to a damping force which is linearly dependent upon the velocity, such its influence inversely proportional to the mass of the oscillator.
	www.destarter.com /oscillator/oscilator.html (220 words)

	Audio engineering - an introduction
		Frequency response is typically measured by connecting an audio oscillator to the input of the system and measuring the input voltage as a function of frequency.
		For example, in audio tape recording, the first recording is typically made at 400Hz with 100% modulation, and the second recording is made with no input.
		Now, the audio signal is sampled at a minimum of twice the highest frequency (the Nyquist criteria) of the low pass filter (typically 44.1 kHz).
	www.ee.washington.edu /conselec/CE/kuhn/audio/95x3.htm (220 words)

	Sound, synthesis and audio reproduction: Sound synthesis
		The idea behind FM synthesis is that quite rich and deliciously time‐variable timbres can be created by modulating the frequency of a carrier sine oscillator by another, the modulator.
		Synthesis products are invariably used by people with little technical background and even with such knowledge, people lack interest in tinkering with obscure settings for hours to produce the instrument they want.
		However, since the synthesis procedure bears absolutely no resemblance to the formation of sound in nature, the method is poorly suited to general simulation of acoustical instruments.
	www.helsinki.fi /~ssyreeni/dsound/dsound-c-07 (11269 words)

	Communications Engineering & Design - 2/2004: CICIORA'S CORNER
		Prior to Armstrong’s oscillator, radio transmitters were devices with a spark gap for wireless telegraphy or specialized, mechanical rotating machinery, a high-speed generator for transmitting audio signals using amplitude modulation.
		Armstrong’s oscillator not only made the transmitter more controllable and less costly, it allowed operation at much higher frequencies.
		Armstrong began work on frequency modulation in 1924 and demonstrated it after a decade of long hours and hard work in 1933 to Sarnoff.
	www.cedmagazine.com /ced/2004/0204/02cic.htm (972 words)

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