Timeline for Where does the input resistance formula of a BJT amplifier come from?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
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| Feb 15 at 7:03 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Oct 6, 2023 at 14:03 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jun 5, 2023 at 18:01 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Apr 3, 2020 at 9:01 | comment | added | LvW | To complete the picture (verification based on system theory with beta=hfe and rpi=hie)): With (1+hfe)=ge (transconductance ge=d(Ie)/d(Vbe)) we arrive at r,ib=hie(1+geRe). What we can see now is how signal feedback (caused by Re) increases the input resistance of the B-E path (hie) by the factor (1+loop gain). This is in full accordance with sysytem theory. | |
| Apr 3, 2020 at 8:33 | comment | added | G36 | How would you define the input resistance of a BJT seen from the base into transistor than? electronics.stackexchange.com/questions/407868/… | |
| Apr 3, 2020 at 7:59 | answer | added | Findus | timeline score: 1 | |
| Apr 3, 2020 at 6:30 | history | asked | Whiteclaws | CC BY-SA 4.0 |