Question

What is cut-off frequency and how to calculate for low pass filter?

Answer #1

What is the relationship between the poles of a high
pass and low pass filter and the cut off frequency? How do I design
a circuit that gives a specific cut off? for instance, an active
high pass first order filter with a cut off frequency of
100khz?

A Chebyshev filter must have an attenuation of at least 20dB at
twice the cut-off frequency of 3kHz. The filter has 1dB ripple in
the passband. Find the transfer function of appropriate low-pass
filter.

Problem 2. Frequency Mixers. Sketch the block diagram of a diode
ring mixer with low-pass filter on the IF port. The low pass filter
has a 3 dB cutoff frequency of 10 kHz. The Local Oscillator input
is +7 dBm at 8.000 MHz. There are two input signals, one at 8.008
MHz and the other at 7.996 MHz. Use the trig identity cosacosb to
calculate the frequencies of the outputs from the two input
signals. Sketch the inputs and outputs...

10.4 - The first order
analog low pass filter H(s) = 1500/(s + 1500) must be transformed
into a digital filter operating with an 8 kHz sampling
rate.
a. Prewarp the cut-off frequency for the filter and
modify the analog transfer function accordingly.
b. Find the transfer function for the digital
filter.
c. Find the difference equation for the
filter.
d. Find the frequency response and draw the filter
shape.
e. Find the digital filter shape directly from the
magnitude...

Draw a 2nd order low pass filter with a flat passband gain of 5
to remove the harmonic content of a 60 HZ square wave of triangular
wave input. Design for a cut off frequency of 80 Hz. Use 50 K Ohm
for the input resistance. Verify your answers using AC Sweep in
PSPICE

Design a bandpass filter with a lower cut off frequency
fLO= 1 KHz and bandwidth B= 3 KHz. Given L=10 mH.
Determine the center frequency ?0 and the quality factor Q of this
filter.

Please show steps. Thank you
Design an identical cascade unit gain active RC low pass filter
of order 4. The cut frequency for the filter is 800Hz. Use 1.0uF
capacitors.
a) Draw the circuit and calculate the values of R.
b) Express the transfer function of the filter H(s).
c) Plot the Bode diagram of the frequency response of the
filter.
d) Estimate the output voltage if the filter is excited with an
input voltage vi(t) = sin(15000t)
e) What...

MATLAB. Design your own low-pass shelving filter which can boost
the low frequency of given music signal. After designing filter,
apply the filter to the original music signal and observe the
result. Include following plots.
A. Magnitude and phase plot of your filter.
B. Magnitude plot of original signal
C. Magnitude plot of filtered signal

Draw the circuit of second order low pass Butterworth filter and
design it at a high cutoff frequency of 1KHz. Draw the frequency
response of the designed filter.

how do i select an appropriate commerialally avuable active low
pass filter. The amplified transducer singal range is -7.5 V to
7.5V and the highest frequency of intrest is 31khz. this a for and
this will be used with the National Instruments model USB 6210
analog-to-digital converter.
please show the calculations needed and a commerialally avuable
active low pass filter that would work.

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