Other Parts Discussed in Thread: TLV9061, TLV9062,
Hi All,
i'm trying to design a PWM DAC with Active Second order Sallen Key Butterworth Low Pass Filter with one stage.
But i got spikes on the Vo please see simulation file attached.
Here is my calculation as per: SLOA049B
Sallen-Key | |||||||
R1 | 2.321663 | kOhm | Butterworth | ||||
R2 | 10.18273 | kOhm | FSF | 1 | |||
C1 | 10 | nF | Q | 0.707107 | |||
C2 | 33.06982 | nF | |||||
f_PWM | 100 | kHz | |||||
f_c | 1.8 | kHz | |||||
n | 3.306982 | ||||||
m | 0.228 | ||||||
SQRT(mn) | 0.868327 | ||||||
R | 10.18273 | kOhm | |||||
C | 10 | nF |
Thank you for the help.
Br,
D.