Increasing speed of Opamp used as Comparator

Jul 11, 2006 119 Replies

DS90C402/SO8. Powered from +6 or so, puts about 4.5 volts into 50 ohms in 640 ps. Don't tell anybody.

John

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I always seem to find 6502 chips that way. :(

Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida

Spehro Pefhany skrev:

Yes, correct.

I must admit I got carried away - had to follow through though.

If you look at the "BJT on the output" solution it is only 3 added components and two of them are resistors (dirt cheap). And this solution was the best I found with respect to the response time (5us)

Regards

Klaus

[snip]

I've only stepped on an LM324 once.

West Virginia sand hornets cured me of going barefoot outdoors.

The LM324 cured me of going barefoot indoors ;-)

...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 | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.

I don't have a lot of choice. I have to wear surgical support stockings as much as possible, so I only wear shoes when i leave the house. The stockings are bad enough, but adding shoes makes my feet hurt and swell even more. Luckily I haven't stepped on any chip barefoot in about 10 years, but I've pried enough 4164 DRAMs out of the soles of my shoes over the years. :(

BTW, Email me when you have the time. I have an idea you might find amusing.

Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida

In article , Klaus Kragelund wrote: [...]

Maybe not, how nasty can the three amplifiers be?

The LM339 can be made to work as a very bad op-amp by placing a capacitor on the output.

Also, you may be able to just have the LM339s oscillating away and doing a ugly sort of PWM.

-- kensmith@rahul.net forging knowledge

Thanks.

Your secret's safe with me ... and Google -- I think they're steadfast, but I'm not as sure.

Cheers, James

Gee, you pique-o-second guys... I stepped on a fast DIP-28 SRAM, once, maybe twice--clenched its pins in my heel--and I still like SRAMs. A lot.

Grins, James Arthur

On Wed, 12 Jul 2006 10:56:45 -0700, John Larkin wrote in Msg.

Aah, childhood memories. It's amazing how much pain a DIL package can inflict.

robert

There's a term for people who deliberately step on IC's barefoot: they're called pin sluts.

John

Is that the best you can think of, woman? LOL

You apparently consider "woman" to be an insult. That sort of attitude must surely complicate your love life, if any.

John

Fred HAS a love life ?:-) Bwahahahahahaha!

...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 | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.

Is that the best you can do, Mary?

Frederica? Is that you ?:-)

...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 | | http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.

I'm not into the monogamy thing- I am a poly-something...

Polymastic? Polymath?

Best regards, Spehro Pefhany

"it\'s the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com

Polynominal?

Cheers, James Arthur

Pollywog? [1]

John

[1] I think that means you have a lot of Italian relatives.

Polyunsaturated.

Service to my country? Been there, Done that, and I\'ve got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida

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