+ Post New Thread
Results 41 to 45 of 45

19th August 2017, 14:12 #41
 Join Date
 Mar 2016
 Location
 Milky Way Galaxy, 179° 56′ 39.4″
 Posts
 252
 Helped
 31 / 31
 Points
 1,366
 Level
 8
Re: Gyrator implementation of chip inductor
I dont have any idea.
That is true. You have to write approximate equations in order to understand the circuit behavior not getting stuck in detailed small signal calculations.
in that formula if ro is high, gm4=gm3 and rd=1/gm3 (since ro3 is high), again you will reach Gm=gm1 as i wrote earlier.

Yesterday, 04:46 #42
 Join Date
 Feb 2016
 Posts
 88
 Helped
 0 / 0
 Points
 624
 Level
 5
Re: Gyrator implementation of chip inductor
Regarding transconductance values determination, should I use manual calculation or simulation ? As for transconductance simulation, how would I do it ? in AC smallsignal simulation ? I could not find any spice examples on transconductance measurement.

Yesterday, 07:43 #43
 Join Date
 Feb 2016
 Posts
 88
 Helped
 0 / 0
 Points
 624
 Level
 5
Re: Gyrator implementation of chip inductor
for BSIM3v3 NMOS model as in http://sprunge.us/EGHI or below , how do I find out which parameter is the transconductance, gm ?
There is no documentation regarding this at http://ngspice.sourceforge.net/exter...330_manual.pdf
*model = bsim3v3
*Berkeley Spice Compatibility
* Lmin= .35 Lmax= 20 Wmin= .6 Wmax= 20
.model N1 NMOS
+Level= 8
+version=3.3.0
+Tnom=27.0
+Acnqsmod=1 elm=3
+Capmod=3
+Nch= 2.498E+17 Tox=9E09 Xj=1.00000E07
+Lint=9.36e8 Wint=1.47e7
+Lintnoi=1e9
+Vth0= .6322 K1= .756 K2= 3.83e2 K3= 2.612
+Dvt0= 2.812 Dvt1= 0.462 Dvt2=9.17e2
+Nlx= 3.52291E08 W0= 1.163e6
+K3b= 2.233
+Vsat= 86301.58 Ua= 6.47e9 Ub= 4.23e18 Uc=4.706281E11
+Rdsw= 650 U0= 388.3203 wr=1
+A0= .3496967 Ags=.1 B0=0.546 B1= 1
+Dwg = 6.0E09 Dwb = 3.56E09 Prwb = .213
+Keta=3.605872E02 A1= 2.778747E02 A2= .9
+Voff=6.735529E02 NFactor= 1.139926 Cit= 1.622527E04
+Cdsc=2.147181E05
+Cdscb= 0 Dvt0w = 0 Dvt1w = 0 Dvt2w = 0
+Cdscd = 0 Prwg = 0
+Eta0= 1.0281729E02 Etab=5.042203E03
+Dsub= .31871233
+Pclm= 1.114846 Pdiblc1= 2.45357E03 Pdiblc2= 6.406289E03
+Drout= .31871233 Pscbe1= 5000000 Pscbe2= 5E09 Pdiblcb = .234
+Pvag= 0 delta=0.01
+ Wl = 0 Ww = 1.420242E09 Wwl = 0
+ Wln = 0 Wwn = .2613948 Ll = 1.300902E10
+ Lw = 0 Lwl = 0 Lln = .316394
+ Lwn = 0
+kt1=.3 kt2=.051
+At= 22400
+Ute=1.48
+Ua1= 3.31E10 Ub1= 2.61E19 Uc1= 3.42e10
+Kt1l=0 Kt1=0.1 Prt=764.3

Yesterday, 07:43

Yesterday, 08:23 #44
 Join Date
 Jan 2008
 Location
 Bochum, Germany
 Posts
 40,165
 Helped
 12269 / 12269
 Points
 232,556
 Level
 100
Re: Gyrator implementation of chip inductor
how do I find out which parameter is the transconductance, gm ?

Yesterday, 09:05 #45
 Join Date
 Feb 2016
 Posts
 88
 Helped
 0 / 0
 Points
 624
 Level
 5
+ Post New Thread
Please login