DAC

hi guys!
i need to design DAC. Its input will be pulse from function generator
and output will be sine wave with 1khz freq. and as high amplitude as
possible. so can some one guide me regarding to this? any comments
will help!!
or if u dont mind designing circuit for me that would be gread ;-)
Bye all!
waiting for reply!

 

Subject: DAC

Hello, Electronics Student. You need a better description of your problem. If
the input is an analog signal (pulse generator) and the output is an analog
signal (sine wave), then you don't really have a DAC (digital-to-analog
converter).

If your input is dependent on pulse amplitude, pulse width or frequency, or a
combination of those, you might want to convert the input into a proportional
DC voltage and feed that into a multiplier IC whose other input is a constant
amplitude sine wave. The output of the multiplier will be a sine wave whose
amplitude is dependent on your variable DC input voltage.

If this doesn't do the job, how about taking a few seconds and thinking about
what you want, and then concisely describe it?

Good luck
Chris

 

I will take a stab at this:

[Function Gen Set to 1khz sine wave]------piece of wire-----output

You may have the circuit components in your junkbox...22 gauge wire should work
just fine.

I have mixed feelings about having done this assignment for you, since it is
probably for a class
and you should really be doing it yourself. But oh well...hope you get an A.

 

What does DAC stand for? Digital to Alternating Current?

Let's see, Tesla coil? No, those are usually 1MHz, not 1kHz...

 

That begs the question what the highest possible amplitude of a 1kHz
sine wave would be (assuming amplitude = voltage). Is there an entry in
the guinness book of records? Is there a limit to what you can achieve
with a transformer?

You mean it would be greed?!

 

I'm really thinking about this Tesla coil idea... how big would it
have to be (and what size capacitor) to resonate at 1kHz? What voltage
could reasonably be obtained? 10^6 volts, surely. 10^8 volts?
Power distribution gets up around 10^6V at 60Hz, and AFAIK they
don't even use resonant transformers.