op-amp
Noun
Meaning
op-amp (plural op-amps)
(electronics) A certain active circuit element useful in creating various kinds of amplifiers and filters.
Synonyms
Examples
A differential amplifier is the first stage of an op-amp, a differential amplifier consists of two transistors which are emitter coupled.
A single sided supply op-amp is one where the input and output voltages can be as low as the negative power supply voltage instead of needing to be at least two volts above it.
A real op-amp may be modeled with non-infinite or non-zero parameters using equivalent resistors and capacitors in the op-amp model.
As an example, the LT1494 micropower op-amp consumes 1.5 microamp but has a 2.7 kHz gain-bandwidth product and a 0.001 V per microsecond slew rate.
Closed loop An op-amp with negative feedback (a non-inverting amplifier) If predictable operation is desired, negative feedback is used, by applying a portion of the output voltage to the inverting input.
;Drift: Real op-amp parameters are subject to slow change over time and with changes in temperature, input conditions, etc. AC imperfections The op-amp gain calculated at DC does not apply at higher frequencies.