electrical engineering, the input impedance of an electrical network is the measure of the opposition to current (impedance), both static (resistance)...

feedback, an op amp circuit's characteristics (e.g. its gain, input and output impedance, bandwidth, and functionality) can be determined by external components...

{\displaystyle r={\frac {E-V_{L}}{I}}} . Electrical impedance Input impedance Nominal impedance Damping factor Voltage divider Early effect small-signal...

Equivalently, it can be defined as the input impedance of a transmission line when its length is infinite. Characteristic impedance is determined by the geometry...

operational amplifier's equivalent circuit has a finite input impedance, a non-zero output impedance, and a finite gain. A real op-amp has a number of non-ideal...

raises input impedance, and reduces distortion, it predates the invention of the negative feedback amplifier and does not reduce output impedance or increase...

Nominal impedance, approximate designed impedance Impedance matching, the adjustment of input impedance and output impedance Mechanical impedance, a measure...

to capacitance, any impedance connected between the input and another node exhibiting gain can modify the amplifier input impedance via this effect. These...

electrical engineering, impedance matching is the practice of designing or adjusting the input impedance or output impedance of an electrical device for...

filter uses a voltage amplifier with practically infinite input impedance and zero output impedance to implement a 2-pole low-pass, high-pass, bandpass, bandstop...

000 tubes or more), high gain, gain stability, high input impedance, medium/low output impedance, good clipper (with a not-too-long tail), non-inverting...

The antenna is resonant at this length, so its input impedance is purely resistive. The input impedance has capacitive reactance below ⁠1/ 4 ⁠ λ and inductive...

output impedance ZS in illustration) is connected to the input of another device (the load impedance ZL in the illustration), these two impedances form...

the above formula can be rearranged to express the input impedance in terms of the load impedance rather than the load voltage reflection coefficient:...

known impedance. It presents at its input the dual of the impedance with which it is terminated. The relationship between the characteristic impedance, Z0...

second circuit is influenced by output impedance of the first circuit (as it is larger than the input impedance of the second circuit). In the ideal voltage...

high input impedance was necessary. The VTVM had a fixed input impedance of typically 1 MΩ or more, usually through use of a cathode follower input circuit...

systems to connect a high output impedance unbalanced output signal to a low-impedance, microphone level, balanced input, usually via an XLR connector and...

floating impedance element, supplied by two voltage sources connected in series, may be split into two grounded elements with corresponding impedances. There...

of the output of an amplifier stage is applied to the input, so as to alter the input impedance of the amplifier. When applied deliberately, the intention...

the input impedance of a network with the addition of an element designated as "extra". In this case, Zd is the same as the impedance of the input test...

output impedance that is higher by the factor β 2 {\displaystyle \scriptstyle {\frac {\beta }{2}}} , on the order of 50 times. The input impedance of a...

use have lower input impedances, as low as 15 kΩ. Since it is possible to use high output impedance devices due to the high input impedance, other factors...

feedback to its input side is described as 'unilateral'. The input impedance of a unilateral amplifier is independent of load, and output impedance is independent...

the impedance bridging principle, in which a low impedance output drives a high impedance input. A typical line out connection has an output impedance from...

it is usually employed for amplifiers that require an unusually low input impedance, for example to act as a preamplifier for moving-coil microphones....

designed for a particular load impedance, ZLoad, and a particular source impedance, Zs. The impedance seen looking into the input port will be ZS if the output...

systems, a high-impedance input may be required for use with devices such as crystal microphones or other devices with high internal impedance. In analog circuits...

frequency of oscillation. The amplifier will have differing input and output impedances, and these need to be coupled into the LC circuit without overly...

of the following characteristics: higher input–output isolation, higher input impedance, high output impedance, higher bandwidth. The use of a cascode...