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Successive-approximation ADC
A successive-approximation ADC (or SAR ADC) is a type of analog-to-digital converter (ADC) that Digitization, digitizes each Sampling (signal processing), sample from a continuous analog waveform using a binary search through all possible Quantization (signal processing), quantization levels. History The SAR ADC was first used for experimental pulse-code modulation (PCM) by Bell Labs in the 1940s. In 1954, Bernard Marshall Gordon, Bernard Gordon introduced the first commercial vacuum tube SAR ADC, converting 50,000 11-bit samples per second. Algorithm The successive-approximation analog-to-digital converter circuit typically contains four chief subcircuits: # A sample-and-hold circuit that acquires the input voltage . # An analog voltage comparator that compares to the output of a digital-to-analog converter (DAC). # A successive-approximation Processor register, register that is updated by results of the comparator to provide the DAC with a digital code whose accuracy in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
SA ADC Block Diagram
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