Which one of the following analog to digital conversion methods is called potentiometric type analog to digital converter ?

Which one of the following analog to digital conversion methods is called potentiometric type analog to digital converter ? Correct Answer Successive approximation method

• An analog-to-digital converter is a system that converts an analog signal, such as a sound picked up by a microphone or light entering a digital camera, into a digital signal
• In general, the potentiometric analog to digital converter is preferred because of it's high resolution and high speed.
• The potentiometric type analog to digital converter works on the principle of successive approximation.

Successive Approximation:

• The basic principle is that binary regression, in which analog input is compared with DAC reference voltage which is repeatedly divided in half.
• A successive approximation A/D converter consists of a comparator, a successive approximation register (SAR), output latches, and a D/A converter.
• It is capable of high speed and is reliable.

Additional Information 

• Counter type ADC and successive approximate ADC uses DAC
• Counter type ADC uses linear search and successive approximation type ADC uses binary search
• Ring counter is used in successive approximation type ADC
• Flash type ADC is the fastest ADC
• Flash type ADC requires no counter
• For an n-bit ADC, flash type ADC requires (2n – 1) comparators
• Dual slope ADC is the most accurate.