Here's one such example:
*************************************************************************
***** LM329 DZ Model adapted from National Semi Schematic *************
***** July 8, 2005 ****************************************************
***** Anode = 1 Kathode = 2 ******************************************
.subckt LM329DZ 1 2
Q10 2 2 3 N1
R1 2 3 50
C1 3 4 15pF
R2 4 6 2k
Q11 3 6 1 N1
R3 5 1 30k
Q12 6 7 3 P1
Q13 7 8 1 N1
C2 7 8 30pF
R4 8 9 10k
R5 9 1 2k
D1 9 2 DZ
R6 2 10 1k
Q14 7 11 10 P1
Q15 11 11 2 P1
Q16 11 9 13 N1
R7 13 1 2.6k
.MODEL DZ D (RS= 0.5164 CJO= 14e-012 BV= 6.2 IBV= 5e-4 TNOM= 27)
.model p1 pnp bf=50
.model n1 npn bf=100 tf=2n cjc=1p is=5e-18 NF=1.07
.ends
*************************************************************************
***** LM329 DZ Model adapted from National Semi Schematic *************
***** July 8, 2005 ****************************************************
***** Anode = 1 Kathode = 2 ******************************************
.subckt LM329DZ 1 2
Q10 2 2 3 N1
R1 2 3 50
C1 3 4 15pF
R2 4 6 2k
Q11 3 6 1 N1
R3 5 1 30k
Q12 6 7 3 P1
Q13 7 8 1 N1
C2 7 8 30pF
R4 8 9 10k
R5 9 1 2k
D1 9 2 DZ
R6 2 10 1k
Q14 7 11 10 P1
Q15 11 11 2 P1
Q16 11 9 13 N1
R7 13 1 2.6k
.MODEL DZ D (RS= 0.5164 CJO= 14e-012 BV= 6.2 IBV= 5e-4 TNOM= 27)
.model p1 pnp bf=50
.model n1 npn bf=100 tf=2n cjc=1p is=5e-18 NF=1.07
.ends
what properties matter in your circuit?
I'm focusing on noise simulations, I would use lithium battery, but I do a soft start and a capacitor in parallel is not a good idea
Here's one such example:
*************************************************************************
***** LM329 DZ Model adapted from National Semi Schematic *************
***** July 8, 2005 ****************************************************
***** Anode = 1 Kathode = 2 ******************************************
.subckt LM329DZ 1 2
Q10 2 2 3 N1
R1 2 3 50
C1 3 4 15pF
R2 4 6 2k
Q11 3 6 1 N1
R3 5 1 30k
Q12 6 7 3 P1
Q13 7 8 1 N1
C2 7 8 30pF
R4 8 9 10k
R5 9 1 2k
D1 9 2 DZ
R6 2 10 1k
Q14 7 11 10 P1
Q15 11 11 2 P1
Q16 11 9 13 N1
R7 13 1 2.6k
.MODEL DZ D (RS= 0.5164 CJO= 14e-012 BV= 6.2 IBV= 5e-4 TNOM= 27)
.model p1 pnp bf=50
.model n1 npn bf=100 tf=2n cjc=1p is=5e-18 NF=1.07
.ends
Wow !
Thanks a lot !
I never use spice noise modeling - after getting a sim fully working in .TRAN I may check sensitivities with .AC - and apply those numbers to actual datasheet noise plots if needed
mostly I just use back of the envelope calcs and the datasheets - and I have designed electronic device noise limited interfaces for many types of transducers professionally - never looked like spice .noise analysis could help - really limited by the real part performance and the system noise from layout, ps, gnds...
mostly I just use back of the envelope calcs and the datasheets - and I have designed electronic device noise limited interfaces for many types of transducers professionally - never looked like spice .noise analysis could help - really limited by the real part performance and the system noise from layout, ps, gnds...
Strongly agree.
Never able to make a decent noise simulation, it seems to me that mathematical models are incomplete in that issue.
Me too I deal with .tran and .ac
However, my knowledge is pretty limited, almost as much as my instruments.
Simulations are my walking stick.
Thanks for your reply.
Never able to make a decent noise simulation, it seems to me that mathematical models are incomplete in that issue.
Me too I deal with .tran and .ac
However, my knowledge is pretty limited, almost as much as my instruments.
Simulations are my walking stick.
Thanks for your reply.
You shouldn't need to simulate the op-amp noise in spice, and in fact, I doubt you will get accurate noise numbers from a best-effort model. Your best bet is to calculate the effective noise using the input voltage and current noise specifications of the op-amp (and of what is feeding it), and the gain and bandwidth of your application. This isn't trivial to do but it isn't hard. Developing a model with accurate noise performance would be much more difficult.
20 secs on Google, here on diyaudio, on the previous page of this thread ;-)
************************************************** ***********************
***** LM329 DZ Model adapted from National Semi Schematic *************
***** July 8, 2005 ************************************************** **
***** Anode = 1 Kathode = 2 ******************************************
.subckt LM329DZ 1 2
Q10 2 2 3 N1
R1 2 3 50
C1 3 4 15pF
R2 4 6 2k
Q11 3 6 1 N1
R3 5 1 30k
Q12 6 7 3 P1
Q13 7 8 1 N1
C2 7 8 30pF
R4 8 9 10k
R5 9 1 2k
D1 9 2 DZ
R6 2 10 1k
Q14 7 11 10 P1
Q15 11 11 2 P1
Q16 11 9 13 N1
R7 13 1 2.6k
.MODEL DZ D (RS= 0.5164 CJO= 14e-012 BV= 6.2 IBV= 5e-4 TNOM= 27)
.model p1 pnp bf=50
.model n1 npn bf=100 tf=2n cjc=1p is=5e-18 NF=1.07
.ends
Jan
************************************************** ***********************
***** LM329 DZ Model adapted from National Semi Schematic *************
***** July 8, 2005 ************************************************** **
***** Anode = 1 Kathode = 2 ******************************************
.subckt LM329DZ 1 2
Q10 2 2 3 N1
R1 2 3 50
C1 3 4 15pF
R2 4 6 2k
Q11 3 6 1 N1
R3 5 1 30k
Q12 6 7 3 P1
Q13 7 8 1 N1
C2 7 8 30pF
R4 8 9 10k
R5 9 1 2k
D1 9 2 DZ
R6 2 10 1k
Q14 7 11 10 P1
Q15 11 11 2 P1
Q16 11 9 13 N1
R7 13 1 2.6k
.MODEL DZ D (RS= 0.5164 CJO= 14e-012 BV= 6.2 IBV= 5e-4 TNOM= 27)
.model p1 pnp bf=50
.model n1 npn bf=100 tf=2n cjc=1p is=5e-18 NF=1.07
.ends
Jan
Last edited:
Thanks!
Looked in Google for two days before writing on this thread, as it was old.
I found one sub files for LM339, but not 329. Was going to go the Yahoo group.
BTW: someone helped found the way to compute the exact value for the resistors in the super-regulator.
Looked in Google for two days before writing on this thread, as it was old.
I found one sub files for LM339, but not 329. Was going to go the Yahoo group.
BTW: someone helped found the way to compute the exact value for the resistors in the super-regulator.
Last edited:
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