Timeline for Reasoning behind values of CE amplifier
Current License: CC BY-SA 4.0
17 events
| when toggle format | what | by | license | comment | |
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| Jan 7, 2020 at 0:00 | history | tweeted | twitter.com/StackElectronix/status/1214335975633178627 | ||
| Nov 25, 2018 at 22:03 | answer | added | jonk | timeline score: 4 | |
| Nov 25, 2018 at 20:19 | comment | added | jonk | @Bula Are you aware that an AC grounded emitter amplifier like this has significant non-linear distortion (signal-related voltage gain) as well as variable voltage gain relative to ambient temperature? (The implication is that if this is part of a larger circuit then global negative feedback will be required to further linearize the result and also deal with ambient temperature variations on the voltage gain.) Separately, are you stick with AC ground via capacitor? Or are you allowed to insert a series resistor with that capacitor in this problem case? | |
| Nov 25, 2018 at 17:55 | comment | added | Bula | I meant to say (R1/(R1+R2))Vcc for the Thevenin equivalent source | |
| Nov 25, 2018 at 17:42 | comment | added | Bula | @LvW Yes but ignore it. We can assume it shorts | |
| Nov 25, 2018 at 17:40 | comment | added | LvW | I think not in Thevenian terms.Just one question: is the right side of the input capacitor C1 connected to the base node? Yes or no? (I must confess, I have overlooked the DC source in your rough hand-drawing). However, for my opinion you need no Thevenian at all. | |
| Nov 25, 2018 at 17:34 | comment | added | Bula | @LvW what would it look like then? Thevenin equivalent between ground and input node results in that resistance (Rb1//Rb2) and a voltage source equal with (R1/R1+R2)Vcc. | |
| Nov 25, 2018 at 17:26 | comment | added | Bula | @analogsystemsrf starting from 100Hz | |
| Nov 25, 2018 at 17:08 | comment | added | analogsystemsrf | At what frequency do you wish the Capacitor to have only a small effect on the circuit? Is 1% effect a safe value? Or 30% effect (about 3dB)? | |
| Nov 25, 2018 at 16:54 | comment | added | LvW | The last drawing is wrong. RB1||RB2 is NOT in series with the base input path. | |
| Nov 25, 2018 at 16:47 | history | edited | Bula | CC BY-SA 4.0 |
added 2 characters in body
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| Nov 25, 2018 at 16:45 | comment | added | JRE | I rotated the first image for you. Could you fix the new one? | |
| Nov 25, 2018 at 16:43 | comment | added | Bula | @Linkyyy I've added a sketch | |
| Nov 25, 2018 at 16:43 | history | edited | Bula | CC BY-SA 4.0 |
added 118 characters in body
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| Nov 25, 2018 at 16:25 | comment | added | Linkyyy | 1. Why do you say that the base is not AC grounded when you look into the emitter? | |
| Nov 25, 2018 at 16:16 | history | edited | JRE | CC BY-SA 4.0 |
Rotated image
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| Nov 25, 2018 at 15:56 | history | asked | Bula | CC BY-SA 4.0 |