Circuit Advice Needed

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

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

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 | |

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

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.

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?

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

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

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

Mike Englehardt posted some interesting information.

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.

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.