capacitor coupling circuit

capacitor coupling circuit. Capacitors are electronic components that serve to store electrical charges. Capacitors can be met in a series of amplifiers, tone control, equalizer and so forth

In audio device capacitor can be used as frequency filter. Both low frequency, sound frequency, or high frequency

Besides being used as a frequency filter the capacitor is also used as a coupling. Where its function is to pass the electric vibration

Also read the article definition and function of the capacitor

capacitor coupling circuit

a simple example of a series of capacitors as coupling is that you can meet in the preamp circuit

Also read make mic preamp 1 transistor

in the capacitor preamp circuit serves to forward the output vibration so that it can be processed by the next input

See the picture capacitor coupling circuit

capacitor coupling circuit

The function capacitor in the picture above is as follows

  • As a frequency filter
  • continuing the electrical current from the collector’s foot so as not to enter the base of the next transistor base
  • Changing the output to be AC ​​current

as a frequency filter

the greater the capacity of the capacitor the ability to filter the lower frequencies will be greater

if you replace the capacitor in the above circuit with a capacitor with a small capacity then the resulting tone is a treble tone

if you want a bigger bass sound then you need to change the capacitor to be a little bigger

the point is a capacitor with a small value is used to produce a high treble or tone note while a capacitor with a large value is used to produce a bass tone

continuing the electrical current from the collector’s foot so as not to enter the base of the next transistor base

As you know, the main function of the transistor is as a current amplifier

small current changes in the base foot will result in large current changes in the collector’s foot

base legs on transistors are designed to receive only small currents and not currents with great power

If the base foot is given a large current it will make a fast transistor damaged

nah capacitor function in the circuit above is as a safety electric current so as not to flow directly to the next transistor

change the output to be AC ​​current

in addition to the two functions described above there is still more function of the capacitor is to change the output current to be AC ​​current

see the difference of AC and DC current

When the input pin is in minimal condition then the current coming into the base foot will be small so that the current flowing into the collector is also small

it causes most of the electric current will flow towards the capacitor and then to the output pin

it will result in a positive voltage output pin

When the input pin is in maximum condition then the current coming into the base foot will be large so that the current flowing to the collector will be great as well

it causes most of the electric current to flow to the collector’s foot

and as a result the electrical current previously stored in the capacitor will flow to the collector-emittor foot and towards the ground

as a result the output pin will be negative voltage

the output signal will change from positive to negative and become positive again so. Onward feasible AC current

The change in the output voltage will correspond to the change of voltage at the input

So an article about capacitor coupling circuit. Also read article definition and function amplifier

 

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