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- Voltage-controlled_filter abstract "A voltage-controlled filter (VCF) is a processor, a filter whose operating characteristics (primarily cutoff frequency) can be controlled by means of a control voltage applied to control inputs. It can be considered to be a frequency-dependent amplifier. Although popularly known for their use in analog music synthesizers, in general, they have other applications in military and industrial electronics.A VCF allows its cutoff frequency and Q factor (resonance at the cutoff frequency), to be continuously varied; the signal outputs may include a lowpass response, a highpass response, a bandpass response, and a notch response. The filter may offer a variable slope which determines the rate of attenuation outside the bandpass, often at 6dB/octave, 12dB/octave (a '2 pole' filter) or 24dB/octave (a '4 pole' filter). This is also varied by the Q.In modular analog synthesizers, filters receive signal input from signal sources, including oscillators and noise, or the output of other processors. By varying the cutoff frequency, the instrument passes or attenuates partials.In some popular electronic music styles, "filter sweeps" have become a common effect. These sweeps are created by varying the cutoff frequency of the VCF (sometimes very slowly). Controlling the cutoff by means of a transient voltage control, such as an envelope generator, especially with relatively fast attack settings, may simulate the attack transients of natural or acoustic instruments.Historically, VCFs have included variable feedback which creates a response peak (Q) at the cutoff frequency. This peak can be quite prominent, and when the filter's frequency is swept by a control, partials present in the input signal resonate. Some filters are designed to provide enough feedback to go into oscillation, and it can serve as a sine-wave source.ARP Instruments made a multifunction voltage-controlled filter module capable of stable operation at a Q greater than 100; it could be shock-excited to ring like a vibraphone bar. Q was voltage-controllable, in part by a panel-mounted control. Its internal circuit was a classic analog computer state variable "loop", which provided outputs in quadrature.A VCF is an example of an active non-linear filter: however, if its control voltage is kept constant, it will behave as a linear filter.".
- Voltage-controlled_filter thumbnail Butterworth_response.svg?width=300.
- Voltage-controlled_filter wikiPageExternalLink STATEVARVCFFEB2006.html&VPW=1027&VPH=500.
- Voltage-controlled_filter wikiPageID "614184".
- Voltage-controlled_filter wikiPageLength "3446".
- Voltage-controlled_filter wikiPageOutDegree "24".
- Voltage-controlled_filter wikiPageRevisionID "678727834".
- Voltage-controlled_filter wikiPageWikiLink ARP_Instruments.
- Voltage-controlled_filter wikiPageWikiLink ARP_Instruments,_Inc..
- Voltage-controlled_filter wikiPageWikiLink Active_filter.
- Voltage-controlled_filter wikiPageWikiLink Band-pass_filter.
- Voltage-controlled_filter wikiPageWikiLink Band-stop_filter.
- Voltage-controlled_filter wikiPageWikiLink Bandpass.
- Voltage-controlled_filter wikiPageWikiLink Category:Nonlinear_filters.
- Voltage-controlled_filter wikiPageWikiLink Category:Synthesiser_modules.
- Voltage-controlled_filter wikiPageWikiLink Cutoff_frequency.
- Voltage-controlled_filter wikiPageWikiLink Electronic_filter.
- Voltage-controlled_filter wikiPageWikiLink Electronic_oscillator.
- Voltage-controlled_filter wikiPageWikiLink Envelope_generator.
- Voltage-controlled_filter wikiPageWikiLink Filter_(signal_processing).
- Voltage-controlled_filter wikiPageWikiLink High-pass_filter.
- Voltage-controlled_filter wikiPageWikiLink Highpass.
- Voltage-controlled_filter wikiPageWikiLink Linear_filter.
- Voltage-controlled_filter wikiPageWikiLink Low-pass_filter.
- Voltage-controlled_filter wikiPageWikiLink Lowpass.
- Voltage-controlled_filter wikiPageWikiLink Non-linear_filter.
- Voltage-controlled_filter wikiPageWikiLink Nonlinear_filter.
- Voltage-controlled_filter wikiPageWikiLink Notch_filter.
- Voltage-controlled_filter wikiPageWikiLink Q_factor.
- Voltage-controlled_filter wikiPageWikiLink Self-oscillation.
- Voltage-controlled_filter wikiPageWikiLink Self_oscillation.
- Voltage-controlled_filter wikiPageWikiLink Subtractive_synthesis.
- Voltage-controlled_filter wikiPageWikiLink Synthesizer.
- Voltage-controlled_filter wikiPageWikiLink Variable-gain_amplifier.
- Voltage-controlled_filter wikiPageWikiLink Voltage.
- Voltage-controlled_filter wikiPageWikiLink Voltage-controlled_amplifier.
- Voltage-controlled_filter wikiPageWikiLink Voltage-controlled_oscillator.
- Voltage-controlled_filter wikiPageWikiLink File:Butterworth_response.svg.
- Voltage-controlled_filter wikiPageWikiLinkText "VCF".
- Voltage-controlled_filter wikiPageWikiLinkText "VCFs".
- Voltage-controlled_filter wikiPageWikiLinkText "Voltage Controlled Filter".
- Voltage-controlled_filter wikiPageWikiLinkText "Voltage-controlled filter".
- Voltage-controlled_filter wikiPageWikiLinkText "analog low pass filters".
- Voltage-controlled_filter wikiPageWikiLinkText "envelope-controlled filter".
- Voltage-controlled_filter wikiPageWikiLinkText "filter".
- Voltage-controlled_filter wikiPageWikiLinkText "filters".
- Voltage-controlled_filter wikiPageWikiLinkText "voltage-controlled filter".
- Voltage-controlled_filter wikiPageWikiLinkText "voltage-controlled".
- Voltage-controlled_filter hasPhotoCollection Voltage-controlled_filter.
- Voltage-controlled_filter wikiPageUsesTemplate Template:Reflist.
- Voltage-controlled_filter subject Category:Nonlinear_filters.
- Voltage-controlled_filter subject Category:Synthesiser_modules.
- Voltage-controlled_filter hypernym Processor.
- Voltage-controlled_filter type Software.
- Voltage-controlled_filter type Filter.
- Voltage-controlled_filter comment "A voltage-controlled filter (VCF) is a processor, a filter whose operating characteristics (primarily cutoff frequency) can be controlled by means of a control voltage applied to control inputs. It can be considered to be a frequency-dependent amplifier.".
- Voltage-controlled_filter label "Voltage-controlled filter".
- Voltage-controlled_filter sameAs Spannungsgesteuertes_Filter.
- Voltage-controlled_filter sameAs Voltage-controlled_filter.
- Voltage-controlled_filter sameAs VCF.
- Voltage-controlled_filter sameAs Spanningsgestuurd_filter.
- Voltage-controlled_filter sameAs m.02wqfg.
- Voltage-controlled_filter sameAs Voltage-controlled_filter.
- Voltage-controlled_filter sameAs Q1638353.
- Voltage-controlled_filter sameAs Q1638353.
- Voltage-controlled_filter wasDerivedFrom Voltage-controlled_filter?oldid=678727834.
- Voltage-controlled_filter depiction Butterworth_response.svg.
- Voltage-controlled_filter isPrimaryTopicOf Voltage-controlled_filter.