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

This article illustrates some typical operational amplifier applications. A non-ideal operational amplifier's equivalent circuit has a finite input impedance...

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

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

The current-feedback operational amplifier (CFOA or CFA) is a type of electronic amplifier whose inverting input is sensitive to current, rather than...

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

schematically identical to a standard operational amplifier (op-amp), the electronic instrumentation amplifier is almost always internally composed of...

an operational amplifier and a single resistor. Simply connect the resistor between the output and the inverting input of the operational amplifier and...

transimpedance amplifier (TIA) is a current to voltage converter, almost exclusively implemented with one or more operational amplifiers. The TIA can be...

due to temperature change. In analog computing, feedback around operational amplifiers is used to generate mathematical functions such as addition, subtraction...

electronic amplifiers is exceedingly high (by design) – an ideal operational amplifier (op-amp) has infinite open-loop gain. Typically an op-amp may have...

In electronics, a pinout (sometimes written "pin-out") is a cross-reference between the contacts, or pins, of an electrical connector or electronic component...

The operational amplifier integrator is an electronic integration circuit. Based on the operational amplifier (op-amp), it performs the mathematical operation...

capacitor. The charge amplifier was invented by Walter Kistler in 1950. Charge amplifiers are usually constructed using an operational amplifier or other high...

more efficient board layout. Operational amplifier (op-amps) swapping is the process of replacing an operational amplifier in audio equipment with a different...

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...

discrete devices, e.g. VCR2N. Another type of circuit uses operational transconductance amplifiers. In audio applications logarithmic gain control is used...

ways. An active circuit, using a device such as a transistor or operational amplifier A passive circuit, using autotransformers. These are typically used...

The precision rectifier is a configuration obtained with an operational amplifier in order to have a circuit behave like an ideal diode and rectifier...

the gain at which the bandwidth is measured. For devices such as operational amplifiers that are designed to have a simple one-pole frequency response,...

engineering, frequency compensation is a technique used in amplifiers, and especially in amplifiers employing negative feedback. It usually has two primary...

A negative-feedback amplifier (or feedback amplifier) is an electronic amplifier that subtracts a fraction of its output from its input, so that negative...

of two input currents. The Norton amplifier can be regarded as the dual of the operational transconductance amplifier (OTA) which takes a differential...

reasonable approximation to an amplifier with unity voltage gain. Modern analog filter implementations may use operational amplifiers (also called op amps). Because...

typically an amplifier. Amplifiers included in a filter design can be used to improve the cost, performance and predictability of a filter. An amplifier prevents...

23, 1998) was the inventor of the operational amplifier (or 'opamp'). He filed the patent for the 'summing amplifier' in 1941 when working at Bell Labs...

A valve amplifier or tube amplifier is a type of electronic amplifier that uses vacuum tubes to increase the amplitude or power of a signal. Low to medium...

A direct-coupled amplifier or DC amplifier is a type of amplifier in which the output of one stage of the amplifier is coupled to the input of the next...

A programmable-gain amplifier (PGA) is an electronic amplifier (typically based on an operational amplifier) whose gain can be controlled by external...

more operational amplifiers ("op amps"), named because they perform mathematical operations. Op amps are a particular type of feedback amplifier with...