Information About ™Gyrator |
| CATEGORIES ABOUT GYRATOR | |
| analog circuits | |
|
SIMULATED INDUCTOR The primary use of a gyrator is to simulate an Inductive element in a small Electronic Circuit or Integrated Circuit . Before the invention of the Transistor , Coil s of Wire with large Inductance might be used in Electronic Filter s. A real inductor can be replaced by a much smaller Assembly containing a Capacitor , Operational Amplifier s or Transistor s, and Resistor s. This is especially useful in Integrated Circuit technology. Real capacitors are often much closer to "ideal capacitors" than real inductors are to "ideal inductors". Because of this, a synthetic inductor realized with a gyrator and a capacitor ''may'', for certain applications, be closer to an "ideal inductor" than any real inductor can be. Thus, use of capacitors and gyrators may improve the quality of filter networks that would otherwise be built using inductors. The Q Factor of a synthesized inductor can be selected with ease. OPERATION OF THE CIRCUIT The circuit works by inverting the effect of the capacitor. The desired effect is an impedance of the form This is an ideal inductor ''L'' with a series resistance ''RL''. From the diagram, it can be seen that the impedance of the simulated inductor is the desired impedance in parallel with the impedance of C and R. |
|
|