Spice Model for ADI 500MHz Four-Quadrant Multiplier Added to my Website

Jan 16, 2015 5 Replies
J

A Spice Model for the ADI 500MHz Four-Quadrant Multiplier has been added (AD834_SPICE_Model.zip) to the Device Models & Subcircuits Page of my Website, with...


  • Improper modeling syntax corrected by Jim Thompson on 2015_01_16:

*
  • " ...subcircuit definitions cannot
  • be nested. That is, a .SUBCKT statement cannot appear in the
  • statements between a .SUBCKT and a .ENDS."

*
  • Also fixed multiple floating node issues by adding 1G R's to node 0.

Works properly now >:-} ...Jim Thompson


| James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
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J

Only at audio frequencies :-( Further checking shows ridiculously wrong bias currents. Looks like all I managed to cure was Spice spitting out syntax and floating node errors :-(

MY APOLOGIES... DON'T USE UNTIL I ROLL MY OWN. ...Jim Thompson

| James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
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J

AD834 is old and expensive!

Did you look at AN-212? It has a bunch of transistor-level detail.

John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
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J

AN-212 is an AppNote. Is there a better multiplier than AD834? I need good performance at 210MHz. ...Jim Thompson

| James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.
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J

Yes, I believe it is.

Is there a better multiplier than AD834? I

Tons of them. AD8343. ADL5391. Lots more.

Linear Tech. TI.

There are a bunch of IQ modulators that have built-in 90 degree phase shifters that work over a wide frequency range. I can't imagine how they manage that. TRF3701. LTC5588-1. ADL5386.

I'm considering using a fast multiplier, like the ADL5391, for my fast variable-height pulse generator, if I can't find a cheaper way to do it.

John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
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J

Informed by ADI that the AD834 model posted on the web "was not an official release", and I had an immediate need, I rolled my own...

AD834_JT_SUBCKT.zip

on the Device Models & Subcircuits Page of my website.

For the moment LTspice _only_.

Comments most welcome, I want to get these sort of animals modeled correctly. ...Jim Thompson

-- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: skypeanalog | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

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| 1962 | I love to cook with wine. Sometimes I even put it in the food.

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