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Theories and Laws ==>

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What Is Phase

RMS And Peak To Peak

Pulses

Pulse Modulation

Magnetism

Heat

Harmonics

Generator Principle

Filters

Electro Magnetism

Conductors And Insulators

Clippers And Limiters

Norton's Theorem

Thévenin's Theorem

Superposition Theorem

Frequency Modulation

The Right-hand Rule

Coulomb's Law

Gauss's Law

Ampere's Law

OHM's Law

Kirchoff's Current Law

Kirchhoff's Voltage Laws

23 topics total

RMS And Peak To Peak

Pulses

Pulse Modulation

Magnetism

Heat

Harmonics

Generator Principle

Filters

Electro Magnetism

Conductors And Insulators

Clippers And Limiters

Norton's Theorem

Thévenin's Theorem

Superposition Theorem

Frequency Modulation

The Right-hand Rule

Coulomb's Law

Gauss's Law

Ampere's Law

OHM's Law

Kirchoff's Current Law

Kirchhoff's Voltage Laws

23 topics total

A filter circuit is like a sieve. It allows some things through and holds back others. In this case we are talking about AC frequencies. Some frequencies pass through the filter while others are rejected.
The characteristics of a filter can be shown on a graph called a FREQUENCY RESPONSE CURVE.

Keywords : Frequency, Filter, Electronic, Curve, Voltage
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**Writer : delon** |

VOLTAGE OUT is plotted against FREQUENCY.

Figure 2 shows a LOW PASS filter response curve giving output at low frequencies but none at higher frequencies.

Figure 3 shows a selection of filter characteristics.

Simple filters can be made from capacitors and resistors

Filters have many applications.In audio frequency amplifiers, CROSSOVER filters to direct low frequencies to the WOOFER and high frequencies to the TWEETER speakers.

In SCRATCH filters to remove unwanted high frequency noise.

In NOTCH filters to remove whistles due to two radio stations being too close together in frequency.

In Hum filters to remove low frequency noise due to the mains supply.

Keywords : Frequency, Filter, Electronic, Curve, Voltage

20 Oct 2006 Fri

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