i m getting difficulty in realizing that,How operating region of nmos and pmos
is decided based on output voltage levels ?
like for nmos
Electronic Elementary Questions :: 11-06-2011 01:49 :: viv_edaboard :: Replies: 1 :: Views: 928
I want to know the value of oxide capacitance in the Level 1 Spice model for both nmos and pmos.
See below a snippet from David M. Binkley "Tradeoffs and Optimization in Analog CMOS Design", p.
Analog IC Design and Layout :: 01-21-2012 07:57 :: erikl :: Replies: 1 :: Views: 1290
Calculate Cox from Tox.
Gate oxide thickness nmos Tox_n = 3.70E-9
Spice mobility U0_n = 5.66E-2
Gate oxide thickness nmos Tox_p = 3.72E-9
Spice mobility U0_p = 7.02E-3
Analog IC Design and Layout :: 01-26-2012 12:42 :: Colbhaidh :: Replies: 3 :: Views: 979
Can any one help me how to write t-cell code for nmos and pmos
how to build t-cell for nmos and pmos. i have seen the manual but i am not able to understand that.
Analog IC Design and Layout :: 09-01-2012 00:31 :: something11 :: Replies: 0 :: Views: 322
how do i size the width of nmos and pmos in xor for minimum delay...
ASIC Design Methodologies and Tools (Digital) :: 11-24-2012 14:49 :: rayan123 :: Replies: 0 :: Views: 192
Too many questions for a single forum thread ... I'll try and comment on a few of them:
How do you calculate the output dc level, i.e. the drain voltage of the nmos and pmos transistors?
Your own answer is fine:
Ideally you would want this to sit on the mid-supply level, so for a spli
Analog IC Design and Layout :: 05-03-2013 10:58 :: erikl :: Replies: 7 :: Views: 633
How can i simulate the values of Oxide capacitance (Cox) and mobility of charge carriers in nmos and pmos in cadence. These values are not provided in process design kit file.
Analog IC Design and Layout :: 07-10-2013 08:17 :: viperpaki007 :: Replies: 14 :: Views: 860
can any one help me in this regard steps to calculate nmos and pmos threshold voltage using Cadence- Virtuoso- ADE L
thanks in advance
Analog IC Design and Layout :: 11-21-2013 08:44 :: venkateshjuturu :: Replies: 5 :: Views: 1143
nmos will be formed in the p-substrate and pmos will be formed inside the N-well (in a normal N-well process). Bulk which is the fourth terminal of the transistor should be connected in such a way that the S/D terminal and Bulk terminal must be reverse biased , hence they are connected in opposite directions for (...)
Analog IC Design and Layout :: 03-01-2014 14:29 :: arun2011 :: Replies: 2 :: Views: 358
CMOS contains both pmos and nmos... search google if u wanna know more...
if u wanna know in details... please buy a textbook on digital integrated circuits...
Analog Circuit Design :: 01-08-2006 11:48 :: sp :: Replies: 4 :: Views: 5440
Where should you connect the bulk terminal of an nmos and pmos and why?
Analog IC Design and Layout :: 09-16-2008 12:08 :: gilbertomaldito :: Replies: 3 :: Views: 4733
What you mean by nmos cap, pmos cap? load capacitances are diffarent from parasitic caps.
DO clarify here
Analog Circuit Design :: 08-14-2009 02:50 :: giri_lp :: Replies: 7 :: Views: 4634
I want to make my own nmos and pmos and NPN and PNP libraries in Orcad 9 so that I can use the schematic editor and build any circuit based on these models and do "neat" step by step schematic entry followed by simulation.
I have following (...)
Analog Circuit Design :: 06-27-2004 05:38 :: v_naren :: Replies: 0 :: Views: 1678
VgsVt turn on Vds>Vgs-Vt Saturation I=0.5uCox(Vgs-Vt)(Vgs-Vt)
nmos=> "1" to turn it on and "0" to turn it off
pmos=> "0" to turn it on and "1" to turn it off
:lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol: :lol:
go here and read more on your own
Analog Circuit Design :: 09-09-2004 20:57 :: dumbfrog :: Replies: 1 :: Views: 1893
In S-EDIT, The nmos or pmos just have a few parametters (W, L,AS, AD,PS,PD...). But when use Cadence,or just simple like Winspice, Hspice the Model of nmos or pmos have a lot of parametters. So. can we add the models(Bsim,Mosic...) to S-edit?
PLD, SPLD, GAL, CPLD, FPGA Design :: 11-03-2006 02:58 :: anhtuan :: Replies: 1 :: Views: 931
CMOS is better because it includes nmos and pmos.
Analog Circuit Design :: 06-13-2007 02:03 :: gevy :: Replies: 7 :: Views: 3224
it is related to layout and i want to know the channel length tracking problem faced while laying out the nmos and p mos say of an inverter
Analog IC Design and Layout :: 12-12-2007 05:23 :: dinesh agarwal :: Replies: 3 :: Views: 699
I want to design a PCB board with nmos and pmos in some W/L.
Is there any one? Thanks
Analog IC Design and Layout :: 03-06-2009 23:06 :: wangkes9 :: Replies: 2 :: Views: 678
If pmos is connected down and nmos on top ,
For input logic 0:
pmos ON and nmos OFF => output is grounded or logic zero (it will not be zero but Vtp)
For input logic 1:
pmos OFF and nmos ON => output is connected to VDD or logic one (it (...)
ASIC Design Methodologies and Tools (Digital) :: 03-13-2008 00:14 :: ramanav :: Replies: 5 :: Views: 1518
What are the significant difference between a nmos source follower and pmos source follower. Thanks in advance
Analog Circuit Design :: 02-06-2005 10:40 :: hrkhari :: Replies: 4 :: Views: 2274
If anyone here has the model files for TSMC 90nm nmos and pmos( thick and thin gates), could you please forward it to me on suhas at ureach dot com?
Thanks a lot.
Analog Circuit Design :: 12-23-2005 06:43 :: suhas_shiv :: Replies: 0 :: Views: 754
It depends on the process you are using. if it provides the double well process, you can connnect the bulks of pmos and nmos to its source ( well).
However, usually they just provide the NWELL process, that means you can connect the bulk of the nmos to ground while the bulk of pmos to its source or VDD. (...)
Analog IC Design and Layout :: 04-05-2006 01:20 :: piao :: Replies: 5 :: Views: 2293
If pmos and nmos are interchanged (nmos on the top, pmos on the bottom), it will become a push-pull output stage.
Analog Circuit Design :: 05-01-2006 18:52 :: jlee :: Replies: 3 :: Views: 798
A simple understanding is that a parasitical diode exists between the bulk of nmos and pmos, so in order to insure this parasitical diode is reversed, connect the bulk of nmos to GND and the bulk of pmos to VDD. Pls see the below picture!
Analog IC Design and Layout :: 11-26-2006 23:31 :: huojinsi :: Replies: 5 :: Views: 1259
some approaches to increase the threshold voltage:
1: the simplest way: connect the substrate with GND for nmos transistor and VDD for pmos transistor.
2:increase the doping level of the substrate.
3:length device can neglect the drain-induced barrier low effect to increase the threshold voltage.
Analog Circuit Design :: 12-13-2006 22:01 :: liuyonggen_1 :: Replies: 13 :: Views: 9282
Where did u get this statement?
Somehow I don't think absolutely pmos is more robust than nmos. I used nmos only ESD struture in some of my IO designs and it works for over 8kV HBM, so your statement is not always rite, maybe in some particular situation.
What i predict is pmos is more uniform in current (...)
Analog IC Design and Layout :: 03-07-2007 04:13 :: firstname.lastname@example.org :: Replies: 5 :: Views: 1549
Is it always that the number of pmos and nmos transistors in a CMOS gate level netlist must be equal.If not please let me know, why?
ASIC Design Methodologies and Tools (Digital) :: 03-15-2007 02:28 :: pratap_v :: Replies: 6 :: Views: 811
If i connect the nmos with VDD and pmos with VSS in the inverter what will happen?
ASIC Design Methodologies and Tools (Digital) :: 09-26-2007 22:25 :: prithivikumars :: Replies: 6 :: Views: 758
How do we size nmos and pmos to increase the threshold voltage??
ASIC Design Methodologies and Tools (Digital) :: 10-17-2007 14:18 :: mujju433 :: Replies: 9 :: Views: 3250
you can read book of Allen, on which there are some different aspects about nmos and pmos as input.
Analog Circuit Design :: 01-06-2008 01:12 :: watersky :: Replies: 10 :: Views: 2170
they won't work....
Vgs needs to have a certain positive value for the nmos to work...and if the transistor drain is connected to Vdd and its source is connected to the output, then the voltage on the source is unknown and the value of Vgs isn't necessarily the voltage needed for the correct operation of the it won't work (...)
Analog IC Design and Layout :: 03-06-2008 08:44 :: salma ali bakr :: Replies: 5 :: Views: 1254
If nmos is connected to Vdd and pmos is connected to GND. What wud happen ??
ASIC Design Methodologies and Tools (Digital) :: 03-19-2008 08:36 :: bala9383 :: Replies: 3 :: Views: 3444
the pic below shows two amplifier, the left is with a pmos active load while the right one with an nmos active load, and we always use the pmos as the load, what confused me is can I use the nmos as the load, what's the difference between them, or is there any advantages with pmos (...)
Analog IC Design and Layout :: 05-19-2008 23:45 :: abcyin :: Replies: 9 :: Views: 1868
dear friend if u use nmos for pull up then Vt(Vgs) will decreased from Vdd but for pmos Vdd transfer to out put .for pull down is is oppose
Electronic Elementary Questions :: 09-02-2008 17:21 :: hrss :: Replies: 3 :: Views: 2248