🚀 go-pugleaf

murphy@pur-phy (William J. Murphy):
> 
> I have thought of a way which might work.  Keep a counter corresponding
> to 0-15 which is incremented each time you D-A a bit.  The counter would
> be used as a multiplier for the voltage to be converted.  So if the digital
> signal was as follows, you would get the following voltages.
> 
>      BitValue     VoltageCounter      Voltage converted/output
> 	0		0		Vmin*(2^counter)*BitValue = 0
> 	1		1		Vmin*2^1*1 = 2*Vmin
> 	1		2		Vmin*2^2*1 = 4*Vmin
> 	0		3		Vmin*2^3*0 = 0
> 	1		4		Vmin*2^4*1 = 16*Vmin
> Etc. ...
> 
The only thing I wouldn't understand is where you "hold" the voltages 
you have converted.  i.e. after you convert say, the first bit, you 
can't do anything with that voltage until you've converted the other 
15 bits.  Would there be some type of analog "memory" involved?  The
only other thing I could think of would to be to still have 16 D to A
converters, but for some reason do the conversions individualy.  Maybe
it is designed to start the conversion process as soon as the first bit
arrives and not wait for the other 15 bits....But why would you want to
do that...it doesn't seem that it would speed up the conversion process 
all that much..  Anyone else have any ideas?

pjz...


Paul J Zawada                          |   zawada@ee.ecn.purdue.edu    
"E-site" Student Consultant            |  ...!pur-ee!ei.ecn.purdue.edu!zawada
Purdue University                      |    
Engineering Computer Network           |    GO BOILERS!!!