Band Pass Filter Circuit: Choose Resistor Values with 100nF Capacitors

In summary, the conversation discusses designing a circuit for a bandpass filter using only capacitors and resistors. The circuit would consist of a low pass filter in series with a high pass filter, allowing a range of frequencies from 200Hz to 1500Hz to pass through. The cutoff frequencies for both filters can be used to determine the resistor values needed for the circuit.
  • #1
HappyNatty
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0

Homework Statement



draw a circuit for a and pass filter using only capacitor and resistors that will transmit signals in the range 200-1500 hertz. if there are only 100 nf capacitors choose resistor values.

Homework Equations





The Attempt at a Solution



i know the circut would look like this http://www.web-books.com/eLibrary/Engineering/Circuits/AC/02121.png [Broken]
but am not sure how to work out r.
thanks
 
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  • #2
What you have there is a low pass filter in series with a high pass filter, thus creating a filter which will only allow a range of frequencies through.

HINT:

In order to allow the range 200Hz -1500Hz to pass what must be:

The cutoff frequency for the high pass filter?

The cutoff frequency for the low pass?

Can you use this information to find the resistor values?
 

What is a band pass filter circuit?

A band pass filter circuit is an electronic circuit that allows only a specific range of frequencies to pass through while attenuating all other frequencies. This is achieved by using a combination of resistors and capacitors to create a frequency-dependent impedance that acts as a filter for the desired frequency range.

What is the purpose of choosing resistor values with 100nF capacitors in a band pass filter circuit?

The resistor values and 100nF capacitors are chosen in order to create a specific cutoff frequency for the band pass filter. This cutoff frequency determines the range of frequencies that will be allowed to pass through the filter.

How do I calculate the resistor values for a band pass filter circuit with 100nF capacitors?

The resistor values can be calculated using the formula R=1/(2πfC), where R is the resistor value in ohms, f is the desired cutoff frequency in Hertz, and C is the capacitance in Farads. For a band pass filter, two resistors are needed - one for the high pass section and one for the low pass section. The values of these resistors will determine the bandwidth of the filter.

What is the relationship between resistor values and the bandwidth of a band pass filter circuit?

The resistor values directly affect the bandwidth of a band pass filter circuit. A higher resistor value will result in a narrower bandwidth, allowing only a smaller range of frequencies to pass through. Conversely, a lower resistor value will result in a wider bandwidth, allowing a larger range of frequencies to pass through.

What are some common applications of band pass filter circuits?

Band pass filter circuits are commonly used in audio equipment, such as speakers and amplifiers, to filter out unwanted frequencies and produce clear sound. They are also used in radio and communication systems to select specific frequencies for transmission and reception. Other applications include signal processing, medical devices, and electronic music production.

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