Types of Analog to Digital Converters
Flash Converter
The fastest type of ADC is the flash converter. It functions similar to the successive approximation converter; it compares the input signals to a certain reference voltage or current.They overhaul by comparing the input with a voltage that is half its input reach. When the input locution is over this even, the converter compares it with three residence of the radius. During comparison, the vocable is frozen and stored in a customary and control course. Once the conversion is finished, the material is transfered and placed to the pc's buffer mindfulness, in which it is scan and processed in convenient batches.
Dual Slope Integrating Converter
Relatively slower than the successive approximation converter, the dual slope type is established to chop uproar and allows the input term to charge a capacitor for a decided day frame to be measured next after the capacitor discharges at a constant percentage.
Charge Balancing Converter
The charge balancing converter works homogenous to the dual slope integrating converter in terms of using the input word to charge a capacitor, on the other hand this hour the capacitor is discharged in units of charge packets. Provided the capacitor is charged more than the required packet size, the converter will release a packet; if not, a packet will not be produced. The input voltage or current is then determined by measuring the pulses coming out of the capacitor. In this type of converter, noise effects are reduced as the input signal is integrated along with the capacitor charging time.
An analog to digital converter (ADC) is an electronic Slogan used to transform input analog happening to a digital figure based on the contemporary's proportions. ADCs are either linear or non-linear according to response, and are extremely categorized into five discrepant types, Particulary: successive approximation, dual slope integrating, illumination, charge balancing and sigma-delta converter.
Successive Approximation Converter
Successive approximation converters add a relatively quick conversion of the input term.A flash converter however has many different comparators, which correspond to the steps of comparison. Thus, an 8-bit converter has a total of 256, or 2 to the power of 8 comparators.
Sigma-Delta Converter
Finally, a sigma-delta converter transforms analog signal under very low resolution and a very high sampling rate. By means of digital filtering and oversampling, the resolution can be accelerated to as much as 20 bits or more. Sigma-delta converters are used in high-resolution conversion of low-distortion and low-frequency audio signals. They are known for their high accuracy and good linearity.
