10 Threads found on edaboard.com: 3rd Order Butterworth Filter
Dear forum members and experts,
I have some questions regarding the measurement of my taped-out active 3rd order butterworth filter.I am trying to extract the bode diagram of the filter.
I attach a screenshot that contains the schematic of the board (PCB) where the filter is placed.
Analog IC Design and Layout :: 17.05.2012 09:25 :: jimito13 :: Replies: 0 :: Views: 237
You could make a cascade of 3rd order and next two 2nd order butterwoth filters. The solution for 2nd and 3rd order filters you can find here:
Analog Circuit Design :: 30.06.2013 10:54 :: Dominik Przyborowski :: Replies: 4 :: Views: 256
I want 4kHz LPF, I design R=780K, C=10pF, and 3 same RC in series, the -3dB is about 4KHz, is the design right?
if right but the size is too big to integrate in IC, can anyone give me some instruction to design a low cost LPF, thanks!
Analog IC Design and Layout :: 26.07.2007 21:46 :: xiexi :: Replies: 2 :: Views: 1907
First, if the full scale of your 16-bit adc is 5V, the LSB is actually 76uV (5/2^16)... Again, the filter will not affect the resolution of the ADC but, of course, it will affect the amplitude of the input signal and therefore your SNR.
One of the missing pieces is how much you want to attenuate the 4.8kHz and why do you need to do it with a 3rd
Analog Circuit Design :: 07.01.2010 20:51 :: JoannesPaulus :: Replies: 3 :: Views: 914
I need to design FIR filter with cutoff frequency 100 Hz (with attenuation 3 dB at cutoff frequency), sampling frequency = 1000Hz and having 3rd order butterworth characteristics, using the various types of window functions
Can anyone give me some ideas on how to do this?
Also, could you please tell me how to do (...)
Digital Signal Processing :: 14.06.2011 21:55 :: mahaju :: Replies: 1 :: Views: 1432
Hey guys. Hope everyone is doing great.
I'm supposed to design a 3rd order butterworth low-pass filter and so I combined 1st order and 2nd order butterworth low-pass. That's what I need to do right? And so I did but there's an error saying "Name "X_U1" is defined more than (...)
Analog Circuit Design :: 14.07.2008 20:05 :: rg350dxlover :: Replies: 3 :: Views: 1276
Three cascaded passive RC filters have a very droopy response. The level begins dropping far from the cutoff frequency and is -9dB at the cutoff frequency.
A butterworth filter type has a flat response then a sharp cutoff corner. The level is -3dB at the cutoff frequency. Here is an active 3rd-order (...)
Analog Circuit Design :: 17.06.2010 12:02 :: Audioguru :: Replies: 26 :: Views: 3672
Without a series resistor, the DAC output would show a strong non-linearity. To reduce the PWM ripple effectively without inacceptable response time, a 2nd or 3rd order butterworth low-pass (using one buffer OP) is preferable. The buffer also allows to reduce the filter capacitor size to < 1 uF and use high quality capacitors.
Microcontrollers :: 05.11.2010 19:14 :: FvM :: Replies: 7 :: Views: 1025
I am not a RF designer, mostly work with power and digital design. Was curious to make a 3rd order Chebyshev Bandpass (type1) with the help of some software from the web.
I want to use it in the TV VHF band to pass one channel and stop others.
The design parameters are:
Center Frequency: 204 MHz
Pass Band : 6M Hz
Impedance : 75 Ohm
RF, Microwave, Antennas and Optics :: 28.06.2011 16:20 :: Faithnic :: Replies: 7 :: Views: 1175
Since the VCO creates one pol, your PLL would be of 3rd order, which leads to instability of the closed loop system. You should use only a 1st order lowpass with an additional zero or a PI filter.
Analog Circuit Design :: 31.03.2010 03:53 :: LvW :: Replies: 6 :: Views: 887