# RC Low pass filter Help

#### Antony 16171

Joined Apr 7, 2021
11
I was asked to measure the frequency response of the simple RC low pass filter but am not sure if i have done this right or not ? if you could tell me that would be great .

So I've done
1
1+2*3.14*100*0.02*1000

Voltage source 10V
100Hz then have to do 100kHz
C=0.02

and i was also told to and record the attenuation at 15 to 20 frequencies logarithmically spaced over this frequency range. but i have no clue how to do that .

#### Delta Prime

Joined Nov 15, 2019
1,311
Hello there
Welcome to AAC!
Pardon me for asking but is this homework?
My crystal ball is buffering right now

#### Antony 16171

Joined Apr 7, 2021
11
Hello there
Welcome to AAC!
Pardon me for asking but is this homework?
No am just trying to revising for my exam , and found a pdf about Frequency response network and was trying to complete it, and now am stuck on Q3 and not sure how to do it now .

#### Delta Prime

Joined Nov 15, 2019
1,311
Excellent answer I believe you but I believe everybody stand by please

#### Papabravo

Joined Feb 24, 2006
20,600
Here is a plot of a 1 Farad Capacitor being charged through a 1 Ohm Resistor. The logarithmic scale on the vertical axis shows that the voltage on the capacitor a low frequencies is equal to the voltage source. The logarithm of Vc/Vin =1 and the logarithm of 1 is 0, thus 0 dB. The green curve is computed by taking 20*log(Vc/Vin).

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#### click_here

Joined Sep 22, 2020
548
That formula is so close it hurts!

I would suggest having a quick google of "RC low pass circuit" and find a tutorial and you'll see how close you were