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A/D Converter Tutorial?

A

axispr

Weaksauce
Joined
Feb 5, 2002
Messages
109
Anybody know where I could get a tutorial for designing a A/D converter?

Thanks
 
Describe this "A/D"...

how many input channels? what sampling rate? how many bits? what output format?
 
This is a final project for my Analog Integrated Ckt Design class, I have to design it at the transistor level. The professor hasen't handed out the specs but I know it will be 6-bit, with sampling rate of 1Mhz and work with 3 volts.
 
Something to get you started:

Use an integrator (an op-amp with an input resistor and feedback capacitor), which will integrate the reference signal until the capacitor voltage goes to zero volts. When the voltage crosses zero, an op-amp in series with the integrator's output will output a 5 volt signal to a 6-bit counter, which will count the 5 volt pulses as the process repeats. The counter's output will be the 6-bit digital output.
 
6 bit, 1MHz... sounds like a flash ADC, unless you want to design a superfast sigma delta ADC (and I'm sure you don't)
 
I'm not really sure what type of ADC it is, I'll probably get more info tomorrow. I'm really looking for some sort of guidelines or considerations used during the design. I've been looking around the web with no luck, hope you guys can help me out :)

Thanks
 
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