Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

How to compare the size of an inverter and two cascaded inverters?

Status
Not open for further replies.

cadenceUK

Member level 5
Joined
Aug 15, 2007
Messages
90
Helped
1
Reputation
2
Reaction score
1
Trophy points
1,288
Activity points
1,862
What do u mean by size of inverter!

When we say it is a minimum sized inverter with size = H= 1 !

What do we mean?

Plz detail abt it

Thx

Added after 5 minutes:

I guess it is the width of transisters used inside the inverter!

But if I want to compare 2 inverters....

1 with size H = 50 ( say)

Now Other 1 is an inverter made up of two cascaded inverters x and y!!

Now to compare ..

Should i follow

H = x+y?

Added after 1 minutes:

Where H = size of inverter

X,Y = size of cascaded inverters!

I want to compare p/f of H with (X&Y!)
 

sp

Full Member level 6
Joined
Jan 1, 2004
Messages
396
Helped
23
Reputation
46
Reaction score
2
Trophy points
1,298
Location
Floating Garden
Activity points
4,046
Size of inverter?

normally i use W/L as the size of transistor or inverter... W = width, L = length.

so min size means in 65nm technology node, L = 65nm and W is to follow the design rule speicified min width (i forgot this :)

if you have two parallel connected transistors and u wan to match with a single inverter, and assume u want the same L, you need to make the width of the two parallel transistors half the size of the single transistor so they have the same resistance as the equivalent single transistor.

I am not sure about how the two cascaded inverters connection (you mentioned) so too diff for me to visualize. u might need to draw it out....

regards
sp
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top