1000 Threads found on edaboard.com: Body Effect In Cmos
what is body effect in cmos?and how it will come and how it will reduced?
ASIC Design Methodologies and Tools (Digital) :: 09-08-2009 05:37 :: vamsi_addagada :: Replies: 4 :: Views: 17182
what is latchup ? and body effect ? in cmos.....
ASIC Design Methodologies and Tools (Digital) :: 01-31-2014 02:01 :: shrikantec :: Replies: 1 :: Views: 344
using Deep-Nwell , the body effect will be relieved
Analog Circuit Design :: 03-22-2007 02:25 :: waxtomato :: Replies: 10 :: Views: 1059
Do we have body effect in NMOS and PMOS individually ??????????????????????
If yes why and how? plz explain me
ASIC Design Methodologies and Tools (Digital) :: 10-27-2007 03:28 :: cooldude040 :: Replies: 2 :: Views: 1562
how to mitigate body effect in BJT ...normally by keeping low reverse voltage to collector base junction we can avoid it.. is there any other soultion in sight to mitigate it
Electronic Elementary Questions :: 12-28-2005 02:32 :: electronics_kumar :: Replies: 3 :: Views: 1289
the textbook tells me when Vbs=0 there is no body effect...
is anything changed?
Analog IC Design and Layout :: 11-07-2006 23:40 :: strennor :: Replies: 11 :: Views: 5542
The derived equation for gm is assumed to be in body effect existing condition, then it is not correct when vsb = 0
Analog IC Design and Layout :: 05-05-2005 08:23 :: amir_se :: Replies: 4 :: Views: 2894
How do i calculate body effetc of cmos?
Mathematics and Physics :: 09-24-2005 11:13 :: shermaine :: Replies: 2 :: Views: 2248
how to avoid occurance of Miller and body effect in BJT..?
SOLUTIONS ARE WELCOMED
Electronic Elementary Questions :: 12-12-2005 04:00 :: electronics_kumar :: Replies: 1 :: Views: 661
can anybody elobarate on this (MTcmos) specific applications.
Analog IC Design and Layout :: 02-22-2006 07:37 :: vijay.kumarreddy :: Replies: 5 :: Views: 4060
is it applicable to use body effect to change the Vth,by connecting the bulk with some variable supply.Pls give your suggestion.
Analog Circuit Design :: 07-27-2006 11:17 :: runom :: Replies: 1 :: Views: 553
I was studying MOSFETs and as i was reading Microelectronic Circuits by Sedra & Smith, I saw the concept of body effect. Now the body effect and why it is happening is clear, but there is one thing I didn't understand. When Vsb is increased Vt also increases so far so good but why the hell does drain current increases when (...)
Analog Circuit Design :: 12-26-2010 12:43 :: albus :: Replies: 1 :: Views: 1062
If we do the small signal analysis of
1. CS stage with source degeneration ( ie. additional resistor at the source terminal)
2. Source follower
3. Common gate stage
all the three have their source voltages varying as the input voltage varies, hence all of them would have influence of body effect. However, in the case of the firs
Analog IC Design and Layout :: 06-18-2011 08:13 :: mvj :: Replies: 1 :: Views: 420
can anyone tell me what is body effect in cmos?
and what is meant by process in PVT conditions..
thanks in advance
Check the below link for a brief description of process, voltage and temperature variations,
ASIC Design Methodologies and Tools (Digital) :: 11-01-2011 03:34 :: f1freak :: Replies: 4 :: Views: 534
i am highly confuse that why do ground body pin of R, C & L in cmos device, but i know the reasion for actice device. but 4 passive i dont know the reasion.
In order to model the parasitic effect of these passive devices we need 3 terminals.... Now, the question is where do we want to connect
Analog Circuit Design :: 08-01-2006 10:32 :: pbs681 :: Replies: 4 :: Views: 657
as far as i thought ,,body effects makes the threshold voltage of mosfet changes,,,so,,you must care when placing the mosfets in series that they still operate in saturation region and this depend to a great extend on the supply voltage ;as it shrinks down ,placing mosfets in series becomes more difficult
check this also
Electronic Elementary Questions :: 04-28-2006 04:09 :: husseinadel :: Replies: 3 :: Views: 1974
The body effect describes the changes in the threshold voltage by the change in VSB, the source-bulk voltage of the MOSFET. Since VSB influences the channel and hence the Threshold voltage (when it is not tied to the source), it can be thought of as a second gate, and is sometimes referred to as the "back gate"; the body (...)
Electronic Elementary Questions :: 06-19-2007 07:14 :: A.Anand Srinivasan :: Replies: 5 :: Views: 1032
When two NMOS transistors are connected in series then the NMOS tarnsistor in the top transistor experiences higher body effect because its Source terminal is not at VSS value. But when two NMOS transistors are connected in parallel then the body effect each experience is same as that of a single NMOS transistor.
Analog Circuit Design :: 08-14-2007 07:48 :: Chethan :: Replies: 5 :: Views: 2425
The rectifier block uses a cascaded Dickson voltage multiplier circuit with multiple cascaded sections in order to convert the extremely low input voltage up to a potential suffi cient for operating cmos circuits.
The bulk terminals of the PMOS transistors were tied to the gate and drain terminals (back-bias) to reduce the effective threshold vol
Analog Circuit Design :: 08-26-2008 10:09 :: standup :: Replies: 0 :: Views: 574
In razavi's design of analog cmos integrated circuit, chapter 3, it states/shows that body effect decrease the output resistance.
But I find it puzzling. I bias the NMOS source with a certain voltage, eg 0.3V.
Setup 1: Base and Source are connected together to 0.3V bias. (No body effect) (...)
Analog IC Design and Layout :: 05-17-2011 12:20 :: surreyian :: Replies: 2 :: Views: 882
Hello every one
I want to calculate the value of "Gamma" (body effect coefficient) of a MOS transistor using Cadence Virtuoso.I ran the DC analysis and checked the DC operating point parameters but can't find "Gamma".Would any body help please??
Analog IC Design and Layout :: 11-11-2013 07:26 :: h.jalali :: Replies: 2 :: Views: 448
Yes, but the normal situation in cascoding is to have the body effect. Using the bulk to source connection (no body effect) will increase the parasitic capacitance of the cascode node due to the required well to isolate bulks.
Analog IC Design and Layout :: 04-09-2005 05:09 :: bastos4321 :: Replies: 5 :: Views: 1113
Hi, all: I have a question when I read the book writed by Razavi. In the book, in page 140, there have a sentense in the last paragraph: Thus, if (w/l)3/(w/l)0=(w/l)2/(w/l)1, then VGS0=VGS3, VX=VY. Note that this result holds even if M0 and M3 suffer from body effect.
I do not know why when (w/l)3/(w/l)0=(w/l)2/(w/l)1, then VGS0=VGS3, VX=VY. a
Analog Circuit Design :: 10-13-2005 02:14 :: wjxcom :: Replies: 1 :: Views: 460
In addition to artem's post:
You can use charge pump, but remember about your substrate. If your substrate is p-type you have to apply to the substrate the most negative voltage, so body terminal of all NMOS transistors in your design should be connected to this pumped negative voltage.
Analog Circuit Design :: 02-23-2006 06:06 :: Fom :: Replies: 8 :: Views: 1819
In both body effect and DIBL, the width of deplition region increases, but in body effect the threshold voltage increases while in DIBL Vth decreases, Why???
Electronic Elementary Questions :: 08-18-2006 01:21 :: animeshjn :: Replies: 1 :: Views: 1464
What are "hot electrons" in cmos?
ASIC Design Methodologies and Tools (Digital) :: 01-26-2007 10:36 :: engrbabarmansoor :: Replies: 2 :: Views: 484
if i connect bulk of the headlight nmos Q1 to the source of it so as to eliminate body effect, is the circuit still able to operate right? If that, why do not people choose this scheme?
Electronic Elementary Questions :: 03-06-2007 03:25 :: yann_sun :: Replies: 1 :: Views: 773
Do you know how to find Vt, ro, uCox, and the body effect parameter when VGS = 0.9V?
Analog Circuit Design :: 04-04-2007 04:07 :: chichan :: Replies: 5 :: Views: 2310
Can anyone explain me the "crowbarred" condition in cmos
Electronic Elementary Questions :: 06-18-2007 11:01 :: Shans60 :: Replies: 8 :: Views: 1906
Can any body help me in designing 5Ghz PLL in cmos, Im using 0.18u.
Analog Circuit Design :: 06-27-2007 00:10 :: satyakumar :: Replies: 1 :: Views: 603
Having body effect is an advantage or disadvantage?
I think that it is advantage as well as disadvantage bcoz wen we consider the three series nmos transistors then bcoz of body effect that is Vsb =0 for the last transistor so the effect is les i mean the input can reach faster than the other two (...)
Analog Circuit Design :: 10-05-2007 11:26 :: pbs681 :: Replies: 2 :: Views: 1014
vt depends on the body bias. change of vt by body bias is the body effect. normally we connect n-mos body to gnd and p-mos body to supply making vsb zero. if you have many nmos devices in series as in nand gate, the body of the device which is close to gnd is at 0V and other (...)
ASIC Design Methodologies and Tools (Digital) :: 10-19-2007 17:12 :: sekapr :: Replies: 3 :: Views: 1867
What is the body effect for a single PMOS ???
ASIC Design Methodologies and Tools (Digital) :: 10-26-2007 15:01 :: cooldude040 :: Replies: 2 :: Views: 2394
Some circuit needs resistor to adjust voltage vallue.
Especially, resistor used in Voltage divider circuit.
In cmos process, process variation of resistor is too large to ignore.
in additional to Aread of Resistor is big compare to NMOS or PMOS
Nevertheless, Why We use Resistor in Voltage divider circuit instead of MOS?
Analog Circuit Design :: 12-15-2007 23:08 :: 020170 :: Replies: 6 :: Views: 1030
Why BJT does not have body effect?
That is, why there is no gmb in BJT small signal model?
Analog Circuit Design :: 07-01-2008 11:51 :: joehwang :: Replies: 1 :: Views: 712
I agree with electronrancher.
You can consider normal NMOS. The body diode will be forward-biased if its drain is negative.
Analog IC Design and Layout :: 08-29-2008 23:49 :: leo_o2 :: Replies: 8 :: Views: 1108
Can anybody please tell me the difference between the two figure of the NMOS transistor and what does body of each transistor determines about each transostor output....
Thanks in advance
Analog Circuit Design :: 06-01-2009 13:35 :: Irfansw07 :: Replies: 3 :: Views: 753
i use 0.18UM180FDKMFC-FDK
in my design i have to avoid body effect so i need to connect the bulk terminal of NMOS to its source
but the problem is the process is twin well
so can i use RF mos in the kit?it has 4 terminals (s,D,G ,B) , when i see RF transistor layout it has a layer called DNW ,does it mean "deep n well"??? an
Analog IC Design and Layout :: 06-03-2011 12:37 :: dgnani :: Replies: 5 :: Views: 976
I am trying to find a q point. There is a body effect, but my vtn is 1 anyways. What region of operation should I assume. Saturation region or triode region?
Assuming that your Vgs (gate-to-source voltage) is larger than Vtn, then the operation region only depends on Vds (assuming the basic square-law model). In tha
Analog IC Design and Layout :: 07-24-2011 08:38 :: analogLow :: Replies: 1 :: Views: 525
I found on my notes that for an NMOS with increase in Vsb voltage body effect increases, Vt also increases. But it is mentioned that with Vgs constant id increases which I feel is wrong since id is proportional to (Vgs - Vt)2. Hence I think id should decrease. Please show me the ligh
Electronic Elementary Questions :: 11-08-2011 07:00 :: salil87 :: Replies: 0 :: Views: 607
Why PMOS and NMOS in an nwell process have different body effect coefficients?
Analog IC Design and Layout :: 11-15-2011 06:10 :: Amy25 :: Replies: 1 :: Views: 1905
what is the significance of switching threshold in cmos?? how it affects the circuit?? please help..
Electronic Elementary Questions :: 06-13-2013 06:36 :: rp276 :: Replies: 1 :: Views: 1241
- body effect extends the depletion region around the source.
- DIBL effect extends the depletion region around the drain.
!!! BUT !!!
- body effect increase Vth whilst DIBL reduces it.
How does this happen since both DIBL and body effects (...)
Analog IC Design and Layout :: 08-14-2014 10:23 :: diarmuid :: Replies: 4 :: Views: 255
I want to simulate SEU(Single Event Upset) effect in SRAM memory cell by SILVACO. In example which is given in silvaco is demonstrating SEU in a MOSFET with an external resistor and capacitor emulating a RAM cell. How can I simulate a SRAM memory cell which is consists of two back to back cmos inverter with transistor.
It will be very
ASIC Design Methodologies and Tools (Digital) :: 09-24-2014 10:27 :: Manzar Mahmud :: Replies: 0 :: Views: 138
A float nwell is usualy used to cancel body effect in PMOS diferential parir in amplifiers.
The problem is that this well has a capacitance to substrate that has at least two effects:
1- Injection of substrate noise in the node.
2- PSRR gets degradate due to the lower pole frequency in that node.
I do not understand the anwsers (...)
ASIC Design Methodologies and Tools (Digital) :: 06-16-2003 09:29 :: bastos4321 :: Replies: 7 :: Views: 4227
Does anyone knows how to design a biasing voltage reference circuit with enable/disable function in cmos?
Normal stable biasing reference point are generated from a chain of equal size PMOS loads. How can we improved this with a enable/disable circuitary which is stable in process and temperature variations? :?:
Analog Circuit Design :: 02-18-2004 00:37 :: wylee :: Replies: 6 :: Views: 2150
What is the minimum LNA noise figure achieveable in cmos 0.18um.
Analog IC Design and Layout :: 04-02-2004 05:17 :: nuntha :: Replies: 6 :: Views: 1887
I have to design a BPSK demodulator, and all I have are block diagrams.
If anyone knows some links with more detalis on designing this in cmos, please let me know.
Analog Circuit Design :: 04-02-2004 06:53 :: stefano2m :: Replies: 0 :: Views: 1288
I must design a low jitter monolithic pll in cmos technology but I donot know how to start? please help me ..
Analog IC Design and Layout :: 05-27-2004 06:33 :: urmiaboy :: Replies: 8 :: Views: 2439
I want to know why & how slew contro is done (dI/dt) is done is cmos I/Os circuit. I am basically interested in active slew rate control techniques.
Analog IC Design and Layout :: 08-02-2004 05:12 :: rajesh13 :: Replies: 6 :: Views: 1685