Difference between revisions of "BUTTER07"
Jump to navigation
Jump to search
Blwikiadmin (talk | contribs) |
Blwikiadmin (talk | contribs) |
||
| Line 20: | Line 20: | ||
[[FILE:BUTTER07-LPF-GAIN.PNG]] | [[FILE:BUTTER07-LPF-GAIN.PNG]] | ||
| + | |||
| + | {| class="wikitable" | ||
| + | ! Cutoff Freq (MHz) | ||
| + | ! C1/C7 (pF) | ||
| + | ! C3/C5 (pF) | ||
| + | ! L2/L6 (uH) | ||
| + | ! L4 (uH) | ||
| + | |- | ||
| + | | 4 | ||
| + | | 360 | ||
| + | | 1500 | ||
| + | | 2.4 | ||
| + | | 3.9 | ||
| + | |- | ||
| + | | 7 | ||
| + | | 200 | ||
| + | | 820 | ||
| + | | 1.5 | ||
| + | | 2.2 | ||
| + | |- | ||
| + | | 14 | ||
| + | | 100 | ||
| + | | 390 | ||
| + | | 0.68 | ||
| + | | 1.1 | ||
| + | |- | ||
| + | | 21 | ||
| + | | 68 | ||
| + | | 270 | ||
| + | | 0.47 | ||
| + | | 0.75 | ||
| + | |- | ||
| + | | 28 | ||
| + | | 51 | ||
| + | | 200 | ||
| + | | 0.36 | ||
| + | | 0.56 | ||
| + | |- | ||
| + | |} | ||
| + | |||
=== Standard SMT Filter Values === | === Standard SMT Filter Values === | ||
Revision as of 16:05, 30 October 2021
- 7th Order Low Pass Butterworth Filter
- Filter Calculator
- Bourns Inductors, 0603, CS160808 family - inexpensive
7 MHz Example
- Parts on my schematic are placeholders
- 7 MHz (example)
- C1 = C4 = 200pF
- C2 = C3 = 820 pF
- L1 = L3 = 1.5 uH
- L2 = 2.2 uH
| Cutoff Freq (MHz) | C1/C7 (pF) | C3/C5 (pF) | L2/L6 (uH) | L4 (uH) |
|---|---|---|---|---|
| 4 | 360 | 1500 | 2.4 | 3.9 |
| 7 | 200 | 820 | 1.5 | 2.2 |
| 14 | 100 | 390 | 0.68 | 1.1 |
| 21 | 68 | 270 | 0.47 | 0.75 |
| 28 | 51 | 200 | 0.36 | 0.56 |
Standard SMT Filter Values
- BUTTER07 with extra capacitor for 2nd order harmonic suppression
- L2 and C5 are piggybacked
3D
