Circuit Advice Needed

Jim grills _people_? I knew he's got a rep as a conservative, but this is way beyond "conservative"!

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Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

I have +24V and -24V supplies and a single control signal to switch output between those two levels or OFF.

If you can provide your own transportation I can provide the food and drink.

I have a smoker sufficiently large to smoke a liberal, whole, without folding ;-)

...Jim Thompson

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|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.

I have a 4-burner grill, plus a smoker big enough to handle a human, whole ;-)

...Jim Thompson

-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | |

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

Hey Jim, Questions, Is there one or two power inputs, one for positive and one for negative? Are there one or two power outputs or a single node that could be both +/-. Do the single or double power inputs have to withstand full reverse voltage to the other rails? Please threw in some incentives for the winning design, maybe a trip to Phoenix and a night at your home for food and drink. Winner may bring a Hibachi if your outdoor grill is too small for four people.

Cheers Harry

3k9_ | | ||-+ -|___|-o-o-o--. z 10v | | | | | A | === | V - | | GND | - ^ | | IN ___ | | | || | -----|___|------)---o--o-----|+ | 56k | | >--o---o--- | OUT | .----------|-/ | | | o----- | | || | V - | 10k | | 56k | | - ^ | -|___|-)-o--|___|----|----| |--| | | | | | | === | z === | GND | A10v GND | | | | | 36k_ | ||-+ '----|___|----o ||

Jim,

I'm not worried until you say you're having a walk-in microwave oven installed.

--Mike

Why? Then we could cook both Dr. Slick and lemonjuice real quick like.

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Best Regards,
Mike

What should be happenning between 100mv and -100mv?

Charles

Can anyone tell us how to check the model to find out?

What manufacturers' models are known to do this?

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Best Regards,
Mike

+------|-_/ +---||n-type | | |--+ | |/ | +--------------|npn | | |e | [330R] | | | | | +----------------+-------+-- -24v

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Tony Williams.

Clamping Vgs to 12v max would be a nice touch.........

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Tony Williams.

Crap. I saw that before anyone replied and blew right on by later. Thanks.

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Best Regards,
Mike

See the thread "TL081/Tl084 Model that actively models Power Supply Cuurent ?", in s.e.d.

Mike Englehardt posted some interesting information.

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Tony Williams.

I posted my circuit in ABSE and included Vgs independent of power rails. I also used two op-amps or comparators but in a different configuration such that I can easily control slewing speeds with no power resistors.

Spank me with your keyboards, Harry

:-)

I'm not subscribed to abse atm Harry, but spank away.

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Tony Williams.

It looks like you risk avalanching the EB junctions of your Q3/Q4 transistors at turn-off- the idea is basically good though.

Hey Fred, Not sure of what you speak. The EB junctions on Q3,4 get back biased 4.3V for 10us then 0VDC continuously. Is this a problem?

Harry

No it's not- was working from the assumption that the 2N2222/2907 Veb,max was 3V- but I see the A versions are now 6V/5V respectively.