Embed Size (px)
Citation preview
1
6.002x CIRCUITS AND ELECTRONICS
Digital Circuit 101 101
2
Review
C +
– + –
R vC vI
vC (0) = VO
3
( ) RCt
IOIC eVVVv−
−+= 1
C +
– + –
t0
vI
VI
R
vC vI
vC (0) = VO
An Intuitive Approach
cbvdtdv
a =+
4
Let’s apply the result to an inverter
Demo
5
A B
VS VS
X CGS
First, rising delay tr at B
6
A B
VS VS
X CGS
1 à 0 at A
Rising delay tr at B
Bv
0
0
vA
5V
5V
t
t
7
Equivalent circuit for 0à1 at B
A B
VS VS
X CGS
8
GSLCRt
SSB eVVv−
−=Rising delay tr at B
9
Numbers
10
Falling Delay at B tf
A B
VS VS
X CGS
11
Falling Delay at B tf Equivalent circuit for 1 à 0 at B
+ – +
–
( )( )VVv SB5
0 =RL
VS
X
RON CGS vB
12
Falling Delay at B tf
ONLTH RRR ||=
LON
ONSTH RR
RVV+
=
+
– + – CGS vB
RTH
VTH
( )( )VVv SB5
0 =
13
+
– + – CGS vB
RTH
VTH
Falling Delay at B tf
14
Numbers
15
Slower may be better
16
Slower may be better
17
6.002 expert saw the solution!
Demo
![a v Ç v v i } ] o v i v v i À } ] o v À Ç o · v É Z l } u µ v ] Z · 2020-01-23 · } À l É u µ } l i v i l ] } o Ç v } À „E ] l } q l } } Ì v u } l l v v i a v v i](https://img.pdfslide.net/doc/110x75/5ecfd6c771ea7905db54f289/a-v-v-v-i-o-v-i-v-v-i-o-v-o-v-z-l-u-v-z-2020-01-23.jpg)
