Search results
Results from the WOW.Com Content Network
The nonideal transformer in Fig. 4 can be shown as the simplified equivalent circuit in Fig. 5, with secondary constants referred to the primary and without ideal transformer isolation, where, = ′----- (Eq. 2.16)
According to Darlington, a large number of equivalent circuits were found by Ronald M. Foster, following his and George Campbell's 1920 paper on non-dissipative four-ports. In the course of this work they looked at the ways four ports could be interconnected with ideal transformers [note 5] and maximum power transfer.
In electrical engineering, a transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits.A varying current in any coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force (EMF) across any other coils wound around the same core.
Looking at the equivalent circuit and neglecting the shunt components, as is a reasonable approximation, one can refer all resistance and reactance to the secondary side and clearly see that the secondary voltage at no load will indeed be given by the ideal model. In contrast, when the transformer delivers full load, a voltage drop occurs over ...
For the sake of simplicity, we consider here that the inductor is the only non-ideal component, and that it is equivalent to an inductor and a resistor in series. This assumption is acceptable because an inductor is made of one long wound piece of wire, so it is likely to exhibit a non-negligible parasitic resistance (R L). Furthermore, current ...
In microwave circuits, impedance inversion can be achieved using a quarter-wave impedance transformer instead of a gyrator. The quarter-wave transformer is a passive device and is far simpler to build than a gyrator. Unlike the gyrator, the transformer is a reciprocal component. The transformer is an example of a distributed-element circuit. [14]
An equivalent circuit of an operational amplifier that models some resistive non-ideal parameters. An ideal op amp is usually considered to have the following characteristics: [5] [6] [7] Infinite open-loop gain G = v out / v in; Infinite input impedance R in, and so zero input current; Zero input offset voltage; Infinite output voltage range
The negative impedance converter (NIC) is an active circuit which injects energy into circuits in contrast to an ordinary load that consumes energy from them.This is achieved by adding or subtracting excessive varying voltage in series to the voltage drop across an equivalent positive impedance.