variable-gain (VGA) or voltage-controlled amplifier (VCA) is an electronic amplifier that varies its gain depending on a control voltage (often abbreviated...

An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the magnitude of a signal (a time-varying voltage or...

clear. A voltage buffer amplifier is used to transform a voltage signal with high output impedance from a first circuit into an identical voltage with low...

considered to be a voltage controlled amplifier. Obvious applications would be for electronic volume control and automatic gain control (AGC). Although analog...

transconductance amplifier (OTA) is an amplifier that outputs a current proportional to its input voltage. Thus, it is a voltage controlled current source...

equalization/tone-control circuits or (b) construct oscillators. The gain of the amplifier with feedback is derived below in the case of a voltage amplifier with voltage...

differential amplifier is a type of electronic amplifier that amplifies the difference between two input voltages but suppresses any voltage common to the...

Non-linear filter Self oscillation Subtractive synthesis Voltage-controlled amplifier Voltage-controlled oscillator Trevor J. Pinch, Frank Trocco (2002). Analog...

transconductance to be controlled. A transresistance amplifier outputs a voltage proportional to its input current. The transresistance amplifier is often referred...

An operational amplifier (often op amp or opamp) is a DC-coupled electronic voltage amplifier with a differential input, a (usually) single-ended output...

A class-D amplifier or switching amplifier is an electronic amplifier in which the amplifying devices (transistors, usually MOSFETs) operate as electronic...

power amplifier classes are letter symbols applied to different power amplifier types. The class gives a broad indication of an amplifier's characteristics...

inventions of David Blackmer and dbx are the Blackmer gain cell (a voltage controlled amplifier for professional audio) and the dbx RMS detector.  The original...

(CCVS). Transimpedance amplifier, an ideal current controlled voltage source (CCVS) Norton amplifier, a current controlled voltage source (CCVS) with a...

voltage-controlled oscillators, voltage-controlled filters, voltage-controlled amplifiers and envelope generators. The first modular synthesizer was developed...

Company built the Novachord, a large instrument powered by 72 voltage-controlled amplifiers and 146 vacuum tubes. In 1948, the Canadian engineer Hugh Le...

A voltage-controlled oscillator (VCO) is an electronic oscillator whose oscillation frequency is controlled by a voltage input. The applied input voltage...

signs. Saturable reactor amplifiers were used for control of power to industrial furnaces. Magnetic amplifiers as variable AC voltage controllers have been...

satisfy certain requirements. The operational amplifier must have large open-loop signal gain (voltage gain of 200,000 is obtained in early integrated...

of the output voltage can be significantly increased by using a differential amplifier, possibly implemented as an operational amplifier: In this case...

Blackmer gain cell is an audio frequency voltage-controlled amplifier (VCA) circuit with an exponential control law. It was invented and patented by David...

A voltage-controlled resistor (VCR) is a three-terminal active device with one input port and two output ports. The input-port voltage controls the value...

analog synthesizer circuits like voltage controlled oscillators, voltage controlled filters, and voltage controlled amplifiers. While both an OTA and an op-amp...

common-emitter amplifier is one of three basic single-stage bipolar-junction-transistor (BJT) amplifier topologies, typically used as a voltage amplifier. It offers...

holding voltage, the operational amplifier generates an "error signal", that is the difference between the command potential and the actual voltage of the...

low pass, an AR envelope generator with switchable sustain, a voltage controlled amplifier, and a white noise generator. It also features a 32–step monophonic...

components, consisting only of a voltage-controlled oscillator, voltage-controlled filter, a voltage-controlled amplifier and a low-frequency oscillator...

the two amplifier outputs, bridging the output terminals. This doubles the available voltage swing at the load compared with the same amplifier used without...

An error amplifier is most commonly encountered in feedback unidirectional voltage control circuits, where the sampled output voltage of the circuit under...

A log amplifier, also known as logarithmic amplifier or logarithm amplifier or log amp, is an amplifier for which the output voltage Vout is K times the...