Describe instruments that use the flash type AD converter Wh

Describe instruments that use the flash type A/D converter. What are the sampling rates employed in these instruments? How are the sampling rate, bandwidth, and sampling times related?

Solution

Flash ADC Also known as Parallel ADC A n-bit flash ADC uses 2 ^n-1 comparators and a encoder logic.

Advantage: the fastest type of ADC.

Disadvantages: limited resolution, expensive, large power consumption and low accuracy. Applications: Data acquisition, satellite communication, radar processing, sampling oscilloscope and high density disk drives.

Sampling rate: Around 1 GHz

In order not to have spectral aliasing of the discrete signal, you need to have a sampling rate that is 2 times the bandwidth.

So the relationship is simple F = 2B