You need to use EasyEDA editor to create some projects before publishing
Simulation not as expected
1022 4
andrewlambert 6 years ago
Hi, I've been trying out EasyEDA and I kicked off with a simple textbook common emitter amplifier circuit. Unfortunately the output waveform showed an in phase copy of the input (sin), about 10% less amplitude. So, I suspected my design, I poached an example off the web and got the same result. In EasyEDA it is as if the input signal is taking a route round to the collector via the +12V rail. So I tried the same design in MultiSim and got the correct class A amplification. So back in EasyEDA I did some simple ohms law testing to see if that would work as expected - it does. I've been over the tutorial videos again, I can't see what I'm missing. I think it is possible that my +12V is not actually a +12V supply, but a simple path for the input signal to get to the collector via one of the bias resistors. Is there anything obvious I am missing? Thanks,
Comments
andrewlambert 6 years ago
An update, while I was writing that I had the idea of taking the transistor out by disconnecting the collecter and I get the same output. So, my +12V rail would appear to be just a straight wiring path.
Reply
andyfierman 6 years ago
Hi Andrew, Welcome to EasyEDA. To get started in simulation with EasyEDA, please see: https://easyeda.com/forum/topic/How_to_find_simulatable_parts_and_run_a_simulation_in_EasyEDA-1YgasK2kC For more help, please make your simulation schematic public (or share it privately with Support): https://easyeda.com/Doc/Tutorial/Share.htm#Sharing Thanks.
Reply
logical 6 years ago
I had a part that didn't want to connect. You need to check the netlist to make sure all connection to the part are made. Go to Miscellaneous->netlist spice to view the circuit netlist. an example netlist for a resistor: R1 VOLPROBE1 V1_1 1k parameter 1 : part name parameter 2 : part lead 1 parameter 3 : part lead 2 parameter 4 : part value or model When I deleted the part and readded it the problem went away.
Reply
andyfierman 6 years ago
Please see this checklist: https://easyeda.com/andyfierman/Essential_checks_before_clicking_the_Convert_Project_to_PCB_Update_PCB_or_Import_Changes_buttons_-7d2c6484b0c74aea930b1acf6459cd39 The same rules about making the schematic readable and checking that pins, wires and netlabels are connected correctly apply equally to simulation schematics as well as non-simulation schematics.
Reply
Login or Register to add a comment
goToTop
你现在访问的是EasyEDA海外版,使用建立访问速度更快的国内版 https://lceda.cn(需要重新注册)
如果需要转移工程请在个人中心 - 工程 - 工程高级设置 - 下载工程,下载后在https://lceda.cn/editor 打开保存即可。
有问题联系QQ 3001956291 不再提醒
svg-battery svg-battery-wifi svg-books svg-more svg-paste svg-pencil svg-plant svg-ruler svg-share svg-user svg-logo-cn svg-double-arrow -mockplus- -mockplus- -mockplus- -mockplus- -mockplus- -mockplus- -mockplus- -mockplus-@1x -mockplus-

Cookie Notice

Our website uses essential cookies to help us ensure that it is working as expected, and uses optional analytics cookies to offer you a better browsing experience. To find out more, read our Cookie Notice