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Re: op amp analysis
Well, it's been some time since I've been here. Yet this circuit (the first one that is) came to mind just the other day. I knew I'd derived it here back when, but I'd lost the derivation, so I had to do it again. Oddly enough I kept running into a divide by zero. Hence, I...
cd4046 +rx tx
Wow! It's looking like I'm going into uncharted territory here with my request for help with lenses! I'm really surprised!
Incidentally, my $14 solution could be the magnifier bubbles tat come with the solar motor experimenter's kit that Radio Shack's been selling for some time...
difference between bjt and fet?
Although EE's will shoot me for this...
An easy way to look at it is this.
In an FET, the gate is insulated from both the source and the drain by a very large resistance. Hence, there is no current flow into the gate. Therefore, it must be a...
74hc7046
klystron,
Thanks. Looks like some good info there, nicuding that Java simulation.
All,
In doing a little research on my own, it's looking like I'm going to need a plano-convex lens pair. The convex part will focus to a point while the plano part will transmit a larger diameter...
increase distance infrared
I'm perplexed!
How can the infrared transmitter for my television control the television from 10 yards away, when it uses only two AA batteries, but a transmitter of my design, which uses near 300mA (when pulsed on) can't make it past two yards? Plus, I think I'm...
I expect this thread to go away once it's fixed.
"To gain the members in the era of Linux and its fast growing EDA Tools and Utilities. Discussions about electronics related software for Linux."
Yeah, I know it's a small thing and few really care these days, but I do, and every time I see it...
Re: op amp analysis
Well I had a little time to spend on it, so here it is.
Vo =
2
(R2/R1)
(1 + R2/Rg)
(V2 - V1)
In other words, as Rg decreases, the gain goes up, towards infinity, and as Rg increases, the gain approaches twice the ratio of R2/R1. One could easily follow the circuit...
Re: audio amplifier
Here are a few:
1. Power output -- How much power is to be delivered to what size load?
2. Gain -- How much input signal is necessary to produce a certain output?
3. Bandwidth -- What frequencies at the input will be reproduced in the output?
4. Linearity -- Is the gain of...
When you ask a question, please consider the person on the other end who'll be trying to answer it. In particular, it's important to know whether the person on the other end knows what system you are asking about. I, for one, have no clue what you are looking at in asking your question, so I...
An amplifier does not really amplify. Rather, it attempts to copy, usually in a linear manner, the input signal. This copy is produced by a voltage divider at the output, a voltage divider consisting of the output impedance of the amplifier and the load impedance. Since this copy is seen as...
jfet vcr
It's called a Voltage Controlled Resistance (VCR). Usually an FET is used as opposed to a BJT, as a FET, since it's really resistive, allows current to flow in both directions.
Any book on FET's contains FET curves, and those curves show that with a small Vds, relative to Vgs, the...
My two cents...
It would seem to me that it'd be faster to turn somethng off than turn something on. Therefore, depletion mode should be faster.
But, like I said, that's just my two cents.
A comparator is an operational amplifier without negative (reducing) feedback.
Therefore, look for a good op amp book. I'd suggest "IC Op-Amp Cookbook" via SAMS publishing.
However, in lieu of the above, just remember this:
Vo = A(Vp - Vn) --- the parentheses mean "multiply by the quantity...
millman
Get a book on technical mathematics, as it'll give you some math background, where you'll need, mostly, Algebra but some Trigonometry. ...Calculus will follow later...
Go with Boylestad or Malvino. Learn DC (direct current -- all voltages fixed) circuit analysis. Particularly you...
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