[volt-nuts] Redrafted schematic of Fluke 732A reference circuit

[David C. Partridge]

It's nothing fancy just a glom of a 2n3904 and a 6.2V Zener wrapped up in .subckt/.ends and makes no claim to a an accurate model (I somehow doubt that either Fluke or LT would be willing to share that).

** LTFLU **
* 
* NI Multisim to SPICE Netlist Export
* Generated by: amonra
* Sat, Jan 20, 2018 15:16:41 
*
.SUBCKT LTFLU C B EK A

*## Multisim Component LFLUD1 ##*
xLFLUD1 A EK BZX84B6V2LT1/ON__ZENER__1

*## Multisim Component LFLUQ1 ##*
qLFLUQ1 C B EK 2N3904__BJT_NPN__1


.SUBCKT BZX84B6V2LT1/ON__ZENER__1 2 1
**************************************
*      Model Generated by MODPEX     *
*Copyright(c) Symmetry Design Systems*
*         All Rights Reserved        *
*    UNPUBLISHED LICENSED SOFTWARE   *
*   Contains Proprietary Information *
*      Which is The Property of      *
*     SYMMETRY OR ITS LICENSORS      *
*Commercial Use or Resale Restricted *
*   by Symmetry License Agreement    *
**************************************
* Model generated on Dec 11, 03
* MODEL FORMAT: PSpice
*     anode cathode
*node: 2      1
*    Forward Section
D1 2 1 MD1
.MODEL MD1 D IS=5.21532e-16 N=1 XTI=1 RS=0.5
+ CJO=9.5e-11 TT=1e-08
*    Leakage Current
R 1 2 MDR 2e+07	
.MODEL MDR RES TC1=0 TC2=0
*    Breakdown
IZG 4 2 0.12
R4 4 2 300
D3 2 4 MD3
.MODEL MD3 D IS=2.5e-12 N=0.37046 XTI=0 EG=0.1
D2 5 4 MD2
.MODEL MD2 D IS=2.5e-12 N=1.16158 XTI=0 EG=0.1
EV1 1 5 6 0 1
IBV 0 6 0.001
RBV 6 0 MDRBV 5792.79
.MODEL MDRBV RES TC1=0.000353198
*-- PSpice DIODE MODEL DEFAULT PARAMETER
*  VALUES ARE ASSUMED
*IS=1E-14 RS=0 N=1 TT=0 CJO=0
*VJ=1 M=0.5 EG=1.11 XTI=3 FC=0.5
*KF=0 AF=1 BV=inf IBV=1e-3 TNOM=27
.ENDS bzx84b6v2lt1

.MODEL 2N3904__BJT_NPN__1   NPN(Is=6.734f Xti=3 Eg=1.11 Vaf=74.03 Bf=416.4 Ne=1.259
+               Ise=6.734f Ikf=66.78m Xtb=1.5 Br=.7371 Nc=2 Isc=0 Ikr=0 Rc=1
+               Cjc=3.638p Mjc=.3085 Vjc=.75 Fc=.5 Cje=4.493p Mje=.2593 Vje=.75
+               Tr=239.5n Tf=301.2p Itf=.4 Vtf=4 Xtf=2 Rb=10)
.ENDS LTFLU 



-----Original Message-----
From: volt-nuts [mailto:volt-nuts-bounces at febo.com] On Behalf Of romeo987
Sent: 23 January 2018 10:31
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Redrafted schematic of Fluke 732A reference circuit

David,
Thank you for that - much easier to follow. I infer from this that you have a Spice model for the LTFLU. Can you elaborate, please?
Roman

> On 22 Jan 2018, at 2:15 pm, David C. Partridge <david.partridge at perdrix.co.uk> wrote:
> 
> OK folks here's another location for anyone who can't get it from eevblog.com:
> 
> <http://www.perdrix.co.uk/manuals/Fluke%20732A%20Reference%20Circuit.p
> df>
> 
> Dave
> 
> -----Original Message-----
> From: volt-nuts 
> [mailto:volt-nuts-bounces+david.partridge=perdrix.co.uk at febo.com] On 
> Behalf Of m k
> Sent: 21 January 2018 22:29
> To: Bob Albert; Discussion of precise voltage measurement
> Subject: Re: [volt-nuts] Redrafted schematic of Fluke 732A reference 
> circuit
> 
>> you possibly need to be logged into eevblog at the same time as you follow the link?
> _______________________________________________
> volt-nuts mailing list -- volt-nuts at febo.com To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> and follow the instructions there.
> 
> _______________________________________________
> volt-nuts mailing list -- volt-nuts at febo.com To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> and follow the instructions there.

_______________________________________________
volt-nuts mailing list -- volt-nuts at febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.