magicalsoup/eifueo
1
0
Fork 0
forked from eggy/eifueo
Code Issues Pull Requests Releases Wiki Activity

ece240: finish diodes

Browse Source
This commit is contained in:
eggy 2023-11-03 12:46:53 -04:00
parent b48570ad09
commit 3a4d48e220
1 changed files with 15 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
docs/2a/ece240.md
View File

@ -73,3 +73,18 @@ $$r_d=\left(\frac{\partial i_D}{\partial v_D}\right)^{-1} = \frac{V_T}{I_D}$$
$$i_D(t)=I_D+\frac{1}{r_d}V_d(t)$$ $$i_D(t)=I_D+\frac{1}{r_d}V_d(t)$$
### Signal analysis
1. Analyse DC signals
- assume blocking capacitors are open circuits
- turn off AC sources
2. Analyse AC signals
- assume blocking capacitors are shorts
- turn off DC sources
- replace diode with effective resistor (the differential resistor)
!!! tip
Most $R$s in the circuit can be assumed to be significantly greater than $r_d$, so $r_d$ can be removed in series or $R$ can be removed in parallel.
!!! warning
Oftentimes, turning off a DC source to nowhere is actually a short to ground.