Hi Everyone,

I am appearing for an interview in a company where the requirement is of Digital Electronics. I would like to know if there is a site where I could get some good digital electronics questions for preparation for the interview. Some of the questions asked in the previous interview.

1) design a circuit to implement the function y=2^x. x input, y output
2) charging and discjarging of a capacitor connected to a CMOS inverter
3) Desing a circuit that produces an ouput that is just like the clock pulse but the Time period is three times the clock pulse.
4) questions regarding setup and hold time, metastability.

Could any one please let me know where I could get similar questions (and answers) for practise. Also could anyone tell me the solution for the 3rd question.

Thanks,
Chan999

 

Hi Chann999, I suggest doing a digital electronics course may be a good start.

 

If the job involved design of digital systems or FPGA logic, you may want to learn a bit more before applying.

* 2^y power is simply shifting bits y spaces.
* RC curve for charging and discharging, a lot of analog happens in digitial, especially high speed digital.
* pulse stretcher circuit, could be done with analog or digital
* Setup and Hold times involve sampling/ADC

 

Setup and Hold times involve sampling/ADC

No, setup and hold time is related to flip-flops and more complex circuits http://en.wikipedia.org/wiki/Flip-flop_(electronics)#Setup_and_hold_times

Anyway, the only usable thing I could find is this, you should watch and understand at least the first 12 lectures.