Download Circuit diagrams

Circuit diagrams
Draw a ciruit diagram1
V DD
S
A
nS
B
S
nS
Y
S
nS
A
B
S
GND
1
also known as:
• circuit schematic diagram
• schematic diagram
• circuit schematic
• schematic
1
Circuit diagrams
Draw a gate level ciruit diagram
A
Y
B
S
a circuit diagram where all the elements are gates
2
Circuit diagrams
Draw a transistor level ciruit diagram
V DD
S
A
S
nY
nS
B
nS
Y
nY
S
nS
S
nY
A
B
GND
a circuit diagram where all the elements are transistors
3
Layout diagrams
Draw a stick diagram
Derive2 a stick diagram
2
S
B
A
Y
S
B
A
Y
use of derive acts as a reminder to show your working
4
Layout diagrams
Draw a mask level layout
Sketch3 a mask level layout
3
S
B
A
Y
S
B
A
Y
use of sketch acts as a reminder that a scale drawing is not required
5
Cross Sections
Draw a cross-sectional diagram
Draw a diagram showing a cross section through ...
P++
N++
N++
P
6
N++
N++
Cross Sections
Draw a cross-sectional diagram
Draw a diagram showing a cross section through ...
X
X’
P++
N++
N++
P
6
N++
N++
Other Hints
• Remember coloured pencils
• Use standard colour codes (or give a key)
– colour codes for stick diagrams do not relate one-to-one with those for
masks
• Diagrams should be unambiguous
– remember basic rules for crossing and connecting wiring
• Don’t waste time on scale drawings if a simple sketch will suffice
7