sci.electronics.basics Google Group

Re: AC coupled offset and gain problem

2009-11-21T06:47:03Z

An op amp is a device that attemps to keep it's two inputs at the same
voltage reference. The inputs also do not draw any current.
Hence, your positive side is simply a voltage divider
V+ = Vref*R2/(R1+R2)
But then V- = V+
So the current through 1370 res, lets call it R3, is
I = (Vi - V-)/R3
This current is the same current that is going through the 2100 resistor,

Re: AC coupled offset and gain problem

2009-11-21T04:05:16Z

%2835457%29,new
Thank you, Shaun.
I assume you got the 1.7 by dividing the output DC level (2.55) by the gain
(1.53), giving 1.67. Makes sense.
What is the approach, in general, to these problems? Calculate gain first, then
set offset from Vo=Vi(R1/R1+R2)(Rg/Rf+Rg) ?
When I used the TI calculator I used +1.6 and -1.6 as the full scale and zero

Re: AC coupled offset and gain problem

2009-11-21T01:14:27Z

You DC offset is as it should be with those values of resistors, 1.5 volts.
You need to change the values of the resistors to the non - inverting input
of the OP-AMP. It's a simple voltage divider then multiplied by the gain of
1.5. You have 1.0 volts going to the non - inverting input, you need 1.7

Re: How delicate is the output of a CMOS IC?

2009-11-20T21:43:39Z

...
If you're paranoid, you could put a couple of 1N4148's or 1N914's to
Vdd and ground, "downstream" of your load limiting resistor.
Cheers!
Rich

Re: How delicate is the output of a CMOS IC?

2009-11-20T20:21:57Z

Yes. That's why I have the series resistor at the output, to
serve double duty as a load current limiter *and* for stability
with capacitive loads (it's a low-speed circuit that I have not
yet constructed or even fully designed).
That /is/ stretching it. I suppose I could make doubly sure by
placing bleed resistors between the several output points and

Re: How delicate is the output of a CMOS IC?

2009-11-20T19:40:59Z

No, the only way you'll damage it is if you end up loading it down
too much (like a short to ground, or by trying to supply too much current
to a following device), and that's not static related. I suppose maybe
a static discharge to the output might jump from the output to the input
and kill it that way, but that's a stretch.

www.brandshoes08.com Paypal wholesale brand SHOES,clothes,handbag,watch,eyeglass,cap,shawl,wallet and so on.

2009-11-20T19:21:21Z

Cheap Wholesale UGG Shoes (paypal payment)
Cheap Wholesale Ugg Shoes (paypal payment)
Cheap Wholesale Ugg Shoes (paypal payment)
Cheap Wholesale Gucci Shoes (paypal payment)
([link] )
Cheap Wholesale GUCCI Boots
Cheap Wholesale Lacoste Shoes
Cheap Wholesale LV Shoes (paypal payment)

۞۞۞paypal wholesale cheap replica hangbags & purse at www.ecyaya.com

2009-11-20T18:51:29Z

۞__۞__۞paypal wholesale cheap replica hangbags & purse at [link]
replica bag replica prada bag replica new prada bag replica claasic
prada bag replica prada handbag replica shoulder bags replica Prada
Cervo Pleat Hobo Bag on [link]
Replica Prada Cervo Pleat Hobo Bag detail below:
The replica Prada Cervo Pleat hobo Bag is an ordinary deerskin

Discount Wholesale Affliction Jeans, BAPE Jeans, Coogi Jeans, D&G Jeans, G-STAR Jeans, LRG Jeans(www.dotradenow.com)

2009-11-20T17:53:13Z

Jeans
Discount Wholesale Affliction Jeans <free shipping paypal payment>
Discount Wholesale AK Jeans ( [link] )
Discount Wholesale Armani Jeans
Discount Wholesale Artful Dodger Jeans <free shipping paypal payment>
Discount Wholesale BAPE Jeans
Discount Wholesale BBC Jeans ( [link] )

๑۩๑۩๑ cheap wholesale pants belts bikinis underwear at www.ecyaya.com

2009-11-20T17:12:43Z

๑۩๑۩๑ cheap wholesale pants belts bikinis underwear at [link]
fahionable pants
cheap wholesale A&F Pants with high quality and low price on [link]
cheap wholesale Affliction Pants with high quality and low price on
[link]
cheap wholesale Artful Dodger Pants with high quality and low price on

AC coupled offset and gain problem

2009-11-20T16:47:35Z

I am having trouble understanding the behavior of a circuit I am using to apply
gain and offset to a triangle wave.
The circuit in question is here:
[link]
My triangle wave output is 4 +/- 1.6 V, and I want 2.55 +/- 2.45 V out of the
gain stage. (0.1 - 5 Vpp)

¤¤¤ 2009 New High quality Cheap Wholesale ED Hardy Sweater, Lacoste Sweater, GUCCI Sweater ect at www.fjrjtrade.com

2009-11-20T15:57:15Z

¤¤¤ 2009 New High quality Cheap Wholesale ED Hardy Sweater, Lacoste
Sweater, GUCCI Sweater ect at [link] <Paypal Payment>
Welcome to website
[link]
High quality Cheap Wholesale Sweaters
[link]
High quality Cheap Wholesale ED Hardy Sweaters

How delicate is the output of a CMOS IC?

2009-11-20T15:42:04Z

Are standard CMOS logic ICs any more susceptible to damage from
external causes than BJT devices via the OUTput terminals? By
external causes, I mean things like ESD or a mild leakage current
from the mains supply.
As an example, suppose an output from a 4000 series logic gate is
intended to drive an external load, but may be left open at

Cheap Wholesale Miumiu real leather Handbags, Juicy real leather Handbags, Chanel, LV real leather Purse Handbag(www.dotradenow.com)

2009-11-20T15:30:51Z

Discount wholesale Handbags
AAA real leather Handbags [link]
Cheap Wholesale Balenciaga real leather Handbags <[link]
paypal payment>
Cheap Wholesale Balenciaga real leather Purse
Cheap Wholesale Bally real leather Purse <free shipping paypal

♣°ω°♣wholesale cheap Jewelrys ∴factory price∴ by paypal at www.ecyaya.com

2009-11-20T14:39:41Z

♣°ω°♣wholesale cheap Jewelrys ∴factory price∴ by paypal at [link]
Chanel Jewelrys at [link]
Bracelet earing necklace
Coach Jewelrys at [link]
Bracelet earing necklace
D&G Jewelrys at [link]
Bracelet earing necklace
Dior Jewelrys at [link]
Bracelet earing necklace

sci.electronics.basics Google Group

Re: AC coupled offset and gain problem

Re: AC coupled offset and gain problem

Re: AC coupled offset and gain problem

Re: How delicate is the output of a CMOS IC?

Re: How delicate is the output of a CMOS IC?

Re: How delicate is the output of a CMOS IC?

www.brandshoes08.com Paypal wholesale brand SHOES,clothes,handbag,watch,eyeglass,cap,shawl,wallet and so on.

۞__۞__۞paypal wholesale cheap replica hangbags & purse at www.ecyaya.com

Discount Wholesale Affliction Jeans, BAPE Jeans, Coogi Jeans, D&G Jeans, G-STAR Jeans, LRG Jeans(www.dotradenow.com)

๑۩๑۩๑ cheap wholesale pants belts bikinis underwear at www.ecyaya.com

AC coupled offset and gain problem

¤¤¤ 2009 New High quality Cheap Wholesale ED Hardy Sweater, Lacoste Sweater, GUCCI Sweater ect at www.fjrjtrade.com

How delicate is the output of a CMOS IC?

Cheap Wholesale Miumiu real leather Handbags, Juicy real leather Handbags, Chanel, LV real leather Purse Handbag(www.dotradenow.com)

♣°ω°♣wholesale cheap Jewelrys ∴factory price∴ by paypal at www.ecyaya.com

۞۞۞paypal wholesale cheap replica hangbags & purse at www.ecyaya.com