Capacitors in Red - Circuit Functions

In summary, a capacitor is an electronic component that stores and releases electrical energy in a circuit. It works by accumulating electric charge on two conductive plates separated by an insulating material. Capacitors have various functions in a circuit, including storing charge, filtering out unwanted frequencies, and stabilizing voltage levels. They are measured in Farads (F) and come in different units such as microfarads (μF), nanofarads (nF), and picofarads (pF). Some common types of capacitors used in electronic circuits are ceramic, electrolytic, and film capacitors, each with their own advantages and uses.
  • #1
math&science
24
0
Does anyone know the purpose of the capacitors circled in red in the file attached? What are their functions in the circuit? Thanks!
 

Attachments

  • circuit.doc
    31 KB · Views: 279
Engineering news on Phys.org
  • #2
The capacitor allows the AC signal to pass, but blocks the DC bias voltage established by resistors so that any preceding circuit is not affected by it.
 
  • #3
And the 4.7uF capacitor increases the gain above 66Hz. The source resistor in parallel with that cap is used to set the DC bias point more accurately.
 

Related to Capacitors in Red - Circuit Functions

1. What is a capacitor?

A capacitor is an electronic component that stores and releases electrical energy in a circuit. It consists of two conductive plates separated by an insulating material, known as a dielectric.

2. How do capacitors work?

When a voltage is applied across the plates of a capacitor, electric charge accumulates on the plates, creating an electric field between them. This stored energy can be released back into the circuit when needed.

3. What are the functions of capacitors in a circuit?

Capacitors have several functions in a circuit, including storing electric charge, filtering out unwanted frequencies, and stabilizing voltage levels. They can also be used to create a time delay or to block direct current (DC) while allowing alternating current (AC) to pass through.

4. How are capacitors measured?

The capacitance of a capacitor is measured in Farads (F), and it is a measure of how much charge the capacitor can hold at a given voltage. Common units for capacitance include microfarads (μF), nanofarads (nF), and picofarads (pF).

5. What are some common types of capacitors used in electronic circuits?

There are several types of capacitors, with the most common being ceramic, electrolytic, and film capacitors. Ceramic capacitors are small and inexpensive, while electrolytic capacitors have a higher capacitance but are larger and more expensive. Film capacitors are used for high-frequency applications and can handle higher voltages.

Similar threads

Replies
21
Views
1K
  • Electrical Engineering
Replies
9
Views
1K
  • Electrical Engineering
Replies
1
Views
838
  • Electrical Engineering
Replies
15
Views
1K
  • Electrical Engineering
Replies
12
Views
1K
Replies
10
Views
2K
  • Electrical Engineering
3
Replies
78
Views
3K
  • Electrical Engineering
Replies
24
Views
1K
  • Electrical Engineering
Replies
7
Views
1K
Back
Top