© 2024 EasyEDA Some rights reserved ISO/IEC
Editor Version
×
Standard
1.Easy to use and quick to get started
2.The process supports design scales of 300 devices or 1000 pads
3.Supports simple circuit simulation
4.For students, teachers, creators
Profession
1.Brand new interactions and interfaces
2.Smooth support for design sizes of over 5,000 devices or 10,000 pads
3.More rigorous design constraints, more standardized processes
4.For enterprises, more professional users
Ongoing
STD Problem with Waveform displaying DB() and PH() for signals of below -100dB
License: Public Domain
Mode: Editors' pick
- 0
Update time：
2021-04-12 04:22:35
Creation time：
2016-01-21 13:36:20
Description
Problem with Waveform displaying DB() and PH() for signals of below -100dB.
Using a volProbe in an AC analysis, signals attenuated by more than 100dB
displayed in Waveform, wrap around and are stuck at 0dB.
The phase response as DB(V(OUT))) approaches and then passes -100dB is also
wrong because, in this example it should continue to asymptotically approach
-90 degrees.
Please compare this with:
http://www.ngspice.com/index.php?public_circuit=qiAlMw
Note that:
20*log10(MAG(V(OUT))) ; this plots OK but Y axis is not labelled in dB
PH(v(out))*360/(2*pi) ; this plots OK but Y axis is labelled in V
Run the simulation and then using the blue gear icon in the WaveForm
display: place the DB(V(OUT)) and PH(V(OUT)) traces in Pane 2.
Design Drawing
schematic diagram
（
1
/
）
-
Problem with Waveform displaying DB() and PH() for signals of below -100dB
Open in Editor -
Low Pass plotting problem
Open in Editor
PCB
（
1
/
）
The preview image was not generated, please save it again in the
editor.
| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | 100k | R1,R3,R4,R5 | R3 | 4 |
| 2 | 2.2k | R2 | R3 | 1 |
| 3 | 0.22u | C1 | C1 | 1 |
| 4 | 1Meg | R6,R12,R11,R13 | R3 | 4 |
| 5 | 0.02u | C2 | C1 | 1 |
| 6 | 0.1u | C3 | C1 | 1 |
| 7 | 300 | R7 | R3 | 1 |
| 8 | 2Meg | R8,R9 | R3 | 2 |
| 9 | 50k | R10 | R3 | 1 |
| 10 | 1N4001 | D1 | DO35-7 | 1 |
| 11 | 1u | C4 | C1 | 1 |
| 12 | 5.5n | C5 | C1 | 1 |
| 13 | 0.039u | C6 | C1 | 1 |
| 14 | 200V | V1 | 2P-5.0 | 1 |
| 15 | ECC83_DM | U1,U2 | NONE | 2 |
| 16 | SIN(0 1 50) AC 1 0 | V2 | 2P-5.0 | 1 |
Unfold
Project Members
0
0
Collect to album
Related Projects
Change a batch
Loading...
Add to album
×
Loading...
reminder
×
Do you need to add this project to the album?