hi
i want to double the signal the is 10V into 20 v .any idea is non- inverting using 741 will work :?:

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plz help friend,s

 

Depending what you are trying to do, an opamp with a non-inverting gain of 2 will do this.

But your question is too obscure, as you don't really give details it's hard to say if it would work for your application.

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i m working on noise genrator....giving output 10V i need 23V ...

so is there any way to make it double



any other think

can i use noise from radio .........just asking in there any differnce b/w noise genrator (noise ) and the noise coming from radio when its not tune into any station :!:

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plz help friend,s

 

You've got two threads going on the same subject, yet you're posting totally contrary requests in them!.

Try posting EXACTLY! what you are wanting to do, I'm presuming (from above) that it's simply to amplify a white noise signal from 10V p-p to 23V p-p?. But you need to give far more details, such as what is is needed to do?, what is it feeding?, how much power is required?, what is the load impedance?, what power supplies do you have?.

In the other thread you've just replied that's you want a power supply to give 20V off a 10V supply, which I presume isn't at all what you need?.

Yes, an FM radio off-station gives white noise, assuming you want white noise? - for audio use pink noise is more often required, and can be generated by filtering white noise.

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yes u got it

i am working on noise genrator circuit . post any noise circuit that u have can genrator 17V to 23V ....

or circuit in which i can use non-inverting 741 to get requied output 23voltage :?:



i m in problem man and i need answer fast that y i post two with same problem ..... i hope u will come up with working noise genrator circuit which can work with 741 to get 23v output

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plz help friend,s

 

You still haven't given many details, try answering the previous questions I asked!. Also, for a new question, do you have some of the circuit already designed and built? - presumably so as you asked how to amplify the noise, rather than create it?.

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hi friend
this is it's a simple sawtooth generator ... that delivers a very small output 0.2v DC and i need to change it into 23V DC

1) will non-inverting amplifier circuits work for this?

2) if not then what will work here?

3) circuit requested if u have

Attached Images

_circuit.jpg (20.5 KB, 579 views)

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plz help friend,s

 

0.2V upto 23V !!!!alot of noise will exist - but that is what you want.

What you want is an opamp that can run off a single supply. Most are dual +/-15V but some of them will allow you to run of a 30V single rail. Remember you supply voltage MUST be greater that the desired signal voltage

The OPA547T,LTC1150CN8,MAX472ESA will work at 30V

 

i will be very great ful if u post the circuit ..

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plz help friend,s

 

here is the circuit i use with 741 op but show 3.05V as inout was 0.5V :roll:


so all of u r saying 741 will not work


then what should i do plesae coem up with any circuit will be great

Attached Images

noise_gen.jpg (29.3 KB, 563 views)

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plz help friend,s

 

What people are asking for is the circuit (schematic) diagram, not your board layout!.

But without drawing it out, I would be surprised if it only puts out 0.2V, I would expect a simple sawtooth oscillator like that to output a great deal more - probably approaching the supply rails!.

A 741 is an extremely old opamp, and far better ones are available, a 741 is always going to restrict the design.

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its MC1458
so u told me that sawtooth is AC not DC

can i mix my AC signal with DC voltage to get 23Voltage?

if yes who?........what will be behavier of the sawtooth signal?

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plz help friend,s

 

hang on!!!

are you sa\ying you want a 23V Dc signal BUT you want some noise on it, so you trying to get a 0.2V pk-pk triangle wave and then give some DC offset so you end up with

Vtri + 23V

thus giving you the "apperance" of 0.2V worth of noise on your DC signal?

If this is the case the 0.2C pk-pk with a DC offset isn't really noise

 

or is it the other way round? :?

because 0.2V of noise (ripple) might be there in the first place if the project is powered from the wall socket.

i think he wants 23V of noise

 

23V pk-pk of noise? true it could be that.
But the whole point of these question is

We need some more infomation!.
What do you want this "noise" for. 23V is quite high a voltage (for a signal) - what is it feeding? why do you need a noisy signal for?