AD8218 spice model is messed up.

Started by Anonymous in sci.electronics.design8 years ago 46 replies

Could someone verify for me that the AD8218 spice model is screwed up? The = model and data sheet are...

Could someone verify for me that the AD8218 spice model is screwed up? The = model and data sheet are here http://www.analog.com/en/specialty-amplifiers/current-sense-amplifiers/ad82= 18/products/product.html I'm just trying to reproduce Figure 35 in the datasheet. I'm using the circ= uit in Figure 34. I tied Vs and ENB to +IN because Ltspice doesn't like tho= se pins floating. I set t...


PING: Aylward or other Spice Expert

Started by Jim Thompson in sci.electronics.design4 years ago 4 replies

PING: Aylward or other Spice Expert... Bringing up a 0.18u/0.35u Vanguard process, building up the PSpice model libraries. Discovered...

PING: Aylward or other Spice Expert... Bringing up a 0.18u/0.35u Vanguard process, building up the PSpice model libraries. Discovered strangeness: ALL devices have HDIF=0.2u, except "native" NMOS, which has HDIF=0.02u!! I thought this might simply be a typo, but that HDIF value is repeated in each of the corner parameter statements. 0.02u seems awfully small to me. Can this be...


For Paul Schoen and John Fields - autotransformer SPICE models.

Started by Fred Abse in sci.electronics.design8 years ago 6 replies

Following the exchanges on SEB, about autotransformers, and turns ratio, I wrote these models. The subckts should run on any SPICE which...

Following the exchanges on SEB, about autotransformers, and turns ratio, I wrote these models. The subckts should run on any SPICE which supports .param and rser/rpar. The .asy files are for LTspice. The symbols should pick up the subckts without any need for a .lib directive. The first is simpler, requiring primary inductance, turns ratio, and primary resistance. The second examp...


diode recovered charge

Started by John Larkin in sci.electronics.design7 years ago 57 replies

I got curious about the amount of reverse-recovery charge in PN diodes, as a function of forward current (and time of fwd bias) and diode...

I got curious about the amount of reverse-recovery charge in PN diodes, as a function of forward current (and time of fwd bias) and diode size/type. Question is, are the LT Spice diode models realistic? We'll have to test some diodes to see. Since diode recovery for a given part number depends a lot on the manufacturer, we should stick to sole-source parts and tweak the Spice model to al...


AN: Spice Model Updated on my Website... Behavioral Diff Pairs

Started by Jim Thompson in sci.electronics.design6 years ago

Spice Model Updated on my Website: See B_DIFF_PAIRS.zip on the Device Models & Subcircuits Page of my website. Improved/Updated (squirmy talk...

Spice Model Updated on my Website: See B_DIFF_PAIRS.zip on the Device Models & Subcircuits Page of my website. Improved/Updated (squirmy talk for serious bug fix ;-) Parameters added to match bipolar or CMOS behavior. Please direct all questions/comments/error-reporting via the E-mail (envelope) icon on my website or via the LTspice List. .....


SPICE simulations of non-ideal inductor behavior

Started by amal banerjee in sci.electronics.design2 years ago 2 replies

Could some electronics guru here plaease shed some light on this ? I am running SPICE simulations of non-ideal inductors, that include high...

Could some electronics guru here plaease shed some light on this ? I am running SPICE simulations of non-ideal inductors, that include high frequency effects as skin and proximity. I am trying to see the resonance peaks when the non-ideal inductor is placed in parallel with a fixed value capacitor. The AC sweep freqienncy is brtween 100 MHz 10 GHz. As I vary the fixed capacitor value, so...


Simulate RF interference coupling prior to testing

Started by mook Jonhon in sci.electronics.design1 year ago 13 replies

I have a circuit that must operate next to a stong RF tranmitter (long rnage communication) Frequencies could be form MHz to Single...

I have a circuit that must operate next to a stong RF tranmitter (long rnage communication) Frequencies could be form MHz to Single GHZ range. what would be the best way to simulate a circuit in spice with a field farying RF fleid impenging on it. capacitove coupling? inductive coupling? other spice coupling method? The circuit dues have a single uH inductor connector to a diode ...


another LT Spice question

Started by John Larkin in sci.electronics.design8 years ago 15 replies

Analog Devices has a model for their AD8033, as...

Analog Devices has a model for their AD8033, as AD8033.cir. http://www.analog.com/Analog_Root/static/techSupport/designTools/spiceModels/license/spice_gener al.html?cir=AD8033.cir How do I get this into LT Spice? -- John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation P


LT Spice universal opamp

Started by John Larkin in sci.electronics.design3 years ago 4 replies

The LT Spice Universal Opamp 2 is not documented in the 'help'. It appears to have zero input capacitance, and maybe no parameters to add...

The LT Spice Universal Opamp 2 is not documented in the 'help'. It appears to have zero input capacitance, and maybe no parameters to add any internally. I guess we'll have to add caps externally. Capacitances would have to be to a rail, I guess. I see opamp data sheets that specify common-mode and differential input capacitances, but I'm not sure what that means. -- ...


SPICE model for lead acid cell

Started by Daku in sci.electronics.design10 years ago 1 reply

Could some electronics guru please direct me to a SPICE model for a lead acid cell. I understand that PSpice comes with a model, but I do not...

Could some electronics guru please direct me to a SPICE model for a lead acid cell. I understand that PSpice comes with a model, but I do not use PSpice, and I hear that the library is encrypted.


LTSpice

Started by OldGuy in sci.electronics.design8 years ago 26 replies

So does LTSpice or some other graphical spice support Triacs Unijunctions PUTs Diac SCR Where can I find simple models for these...

So does LTSpice or some other graphical spice support Triacs Unijunctions PUTs Diac SCR Where can I find simple models for these to use with LTSpice of some free graphical spice? Yes, I need unijuction and triac and etc support. --- news://freenews.netfront.net/ - complaints: news@netfront.net ---


SPICE model for a spark plug?

Started by Joerg in sci.electronics.design1 year ago 51 replies

Looking for a SPICE model that mimics a spark plug, ideally with and without fuel. Does anyone know where to find one? So far I...

Looking for a SPICE model that mimics a spark plug, ideally with and without fuel. Does anyone know where to find one? So far I found: .subckt spark_gap 1 4 R_off 1 2 1e7 ; dark resistance (affects breakdown voltage) R_ion 1 2 R=10/V(ion)**.75 ; dynamic ionization resistance Dfall 2 3 10V ; bidirectional cathode fall voltage Cdfall 2 3 50p Rser=100 ; for convergence V_ion 3 4 0 ; cu...


TD2003 Spice Model Posted to my Site

Started by Jim Thompson in sci.electronics.design7 years ago 5 replies

A preliminary cut to a TD2003 Spice Model has been posted to my website... ...Jim...

A preliminary cut to a TD2003 Spice Model has been posted to my website... ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus


74HCU04 Spice Model found and posted...

Started by Jim Thompson in sci.electronics.design8 years ago 1 reply

On popular request, 74HCU04 Spice Model rescued from 1993 archives and posted on the Device Models & Subcircuits page of my website... ...

On popular request, 74HCU04 Spice Model rescued from 1993 archives and posted on the Device Models & Subcircuits page of my website... ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Sign


What is the maximum signal frequency SPICE can handle ?

Started by Anonymous in sci.electronics.design10 years ago 8 replies

Could some electronics guru tell me what is the maximum signal frequency that the SPICE can handle ? I have experimented with a simple low...

Could some electronics guru tell me what is the maximum signal frequency that the SPICE can handle ? I have experimented with a simple low pass LC filter and found that the maximum input frequency that it can handle (before the output looks like junk) is 1 THz (10^12 Hz) even when the cutoff has been set to 150 THz. What are your experiences with this ?


Diode reverse breakdown voltage in SPICE

Started by Daku in sci.electronics.design10 years ago 1 reply

Could some electronics guru please clarify this issue a bit ? A typical SPICE model for a diode lists the BV (breakdown voltage) and IBV(reverse...

Could some electronics guru please clarify this issue a bit ? A typical SPICE model for a diode lists the BV (breakdown voltage) and IBV(reverse breakdown current). How is the reverse breakdown voltage specified ? This would be important, e.g., for a power diode. Thanks in advance for your help.


AN: Posted, Spice Models for MCP7383X LiIon/Polymer Charge Controllers

Started by Jim Thompson in sci.electronics.design5 years ago

See MCP7383X.zip on the Device Models & Subcircuits Page of my website: Behavioral Spice Models for Microchip Miniature Single-Cell (ALL 32...

See MCP7383X.zip on the Device Models & Subcircuits Page of my website: Behavioral Spice Models for Microchip Miniature Single-Cell (ALL 32 options are modeled :-), Fully Integrated Li-Ion, Li-Polymer Charge Maintenance Controllers. This is a SWAG based ONLY on the datasheet, more along the lines of how I would have designed it > :-} Please report any issues via the Envelope Icon on


New Spice Model Posted... Microchip MCP6566 Comparator

Started by Jim Thompson in sci.electronics.design7 years ago 3 replies

New Spice Model Posted... Microchip MCP6566 Comparator.... MCP6566_Lib.zip On the Device Models & Subcircuits Page of my...

New Spice Model Posted... Microchip MCP6566 Comparator.... MCP6566_Lib.zip On the Device Models & Subcircuits Page of my website. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | ...


Good Find, CD4007 Spice Model Library....

Started by Jim Thompson in sci.electronics.design4 years ago 44 replies

Good Find, CD4007 Spice Model Library, at Rochester Institute of Technology, actual measurements by Professor Lynn Fuller... ...

Good Find, CD4007 Spice Model Library, at Rochester Institute of Technology, actual measurements by Professor Lynn Fuller... ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mi


Power MOSFET SPICE modelling

Started by Glenn in sci.electronics.design8 years ago 2 replies

How can they SPICE model two distinct serially connected resistors (Rls, Rcs - respectively Rll, Rcl) inside a power MOSFET? Are they kidding us...

How can they SPICE model two distinct serially connected resistors (Rls, Rcs - respectively Rll, Rcl) inside a power MOSFET? Are they kidding us ;-) If so is that useful in the model?: A Low-Cost Class-E Power Ampli?er with Sine-Wave Drive - Caltech: http://www.its.caltech.edu/~mmic/reshpubindex/papers/ClassE.pdf (pdf-page 3) - Is it possible (how?) to measure the internal paras