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28-573: [REDACTED] Look up SAR  or sar in Wiktionary, the free dictionary. SAR or Sar may refer to: Places [ edit ] Sar (river) , Galicia, Spain Sar, Bahrain , a residential district Sar, Iran (disambiguation) , several places in Iran Sar, Tibet , Tibet Autonomous Region of China Šar Mountains , in southeastern Europe Sark ,

56-497: A successive-approximation ADC Synthetic-aperture radar , imaging radar Organizations [ edit ] SAR Academy , yeshiva in Riverdale, New York, US SAR High School , the high school of SAR Academy SAR Records , an American record label Scholars at Risk , a network supporting academic freedom School for Advanced Research in anthropology and related fields, Santa Fe, New Mexico, US Sigma Alpha Rho ,

84-445: A successive-approximation ADC Synthetic-aperture radar , imaging radar Organizations [ edit ] SAR Academy , yeshiva in Riverdale, New York, US SAR High School , the high school of SAR Academy SAR Records , an American record label Scholars at Risk , a network supporting academic freedom School for Advanced Research in anthropology and related fields, Santa Fe, New Mexico, US Sigma Alpha Rho ,

112-599: A 2021 video game developed by Pixile Studios See also [ edit ] Saar (disambiguation) SARS (disambiguation) Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title SAR . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=SAR&oldid=1258567037 " Categories : Disambiguation pages Place name disambiguation pages Hidden categories: Short description

140-599: A 2021 video game developed by Pixile Studios See also [ edit ] Saar (disambiguation) SARS (disambiguation) Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with the title SAR . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=SAR&oldid=1258567037 " Categories : Disambiguation pages Place name disambiguation pages Hidden categories: Short description

168-419: A Channel Island, IIGA country code Special administrative regions of China Syrian Arab Republic , sometimes abbreviated as SAR Business and finance [ edit ] Parabolic SAR (stop and reverse), a method of technical stock analysis Saudi riyal , currency code SAR Stock appreciation right , an employee reward Computing [ edit ] sar (Unix) (system activity report),

196-419: A Channel Island, IIGA country code Special administrative regions of China Syrian Arab Republic , sometimes abbreviated as SAR Business and finance [ edit ] Parabolic SAR (stop and reverse), a method of technical stock analysis Saudi riyal , currency code SAR Stock appreciation right , an employee reward Computing [ edit ] sar (Unix) (system activity report),

224-411: A Unix/Linux performance report utility Segmentation and reassembly , in data networks Service Archive or SAR, a file format related to JAR Shift Arithmetically Right (SAR), an x86 instruction Storage Aspect Ratio of a digital image Law enforcement [ edit ] Search and rescue Nationwide Suspicious Activity Reporting Initiative , US Suspicious activity report , by

252-411: A Unix/Linux performance report utility Segmentation and reassembly , in data networks Service Archive or SAR, a file format related to JAR Shift Arithmetically Right (SAR), an x86 instruction Storage Aspect Ratio of a digital image Law enforcement [ edit ] Search and rescue Nationwide Suspicious Activity Reporting Initiative , US Suspicious activity report , by

280-470: A comparator internal to the DAC and the successive-approximation register. When implemented as an analog circuit – where the value of each successive bit is not perfectly 2 (e.g. 1.1, 2.12, 4.05, 8.01, etc.) – a successive-approximation approach might not output the ideal value because the binary search algorithm incorrectly removes what it believes to be half of the values the unknown input cannot be. Depending on

308-474: A financial institution to an authority Science [ edit ] Medicine, psychology, and biology [ edit ] SAR supergroup (Stramenopiles, Alveolates, and Rhizarians supergroup), a clade within the eukaryotes Scaffold/matrix attachment region or scaffold-attachment region, DNA sequences Sexual Attitude Reassessment Specific absorption rate , of RF energy by the human body Structure–activity relationship , of biological effect of

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336-474: A financial institution to an authority Science [ edit ] Medicine, psychology, and biology [ edit ] SAR supergroup (Stramenopiles, Alveolates, and Rhizarians supergroup), a clade within the eukaryotes Scaffold/matrix attachment region or scaffold-attachment region, DNA sequences Sexual Attitude Reassessment Specific absorption rate , of RF energy by the human body Structure–activity relationship , of biological effect of

364-633: A high school fraternity, Philadelphia, Pennsylvania, US Society for Artistic Research Sons of the American Revolution , US organisation Railways [ edit ] Saudi Arabia Railways , national railway company of Saudi Arabia Savage Alberta Railway , Alberta, Canada, reporting mark South African Railways , now part of Transnet Freight Rail South Australian Railways , 1854–1978 Military [ edit ] Sandfontein Artillery Regiment , an artillery regiment of

392-510: A high school fraternity, Philadelphia, Pennsylvania, US Society for Artistic Research Sons of the American Revolution , US organisation Railways [ edit ] Saudi Arabia Railways , national railway company of Saudi Arabia Savage Alberta Railway , Alberta, Canada, reporting mark South African Railways , now part of Transnet Freight Rail South Australian Railways , 1854–1978 Military [ edit ] Sandfontein Artillery Regiment , an artillery regiment of

420-614: A molecule Systemic acquired resistance , of a plant to a pathogen Science and technology [ edit ] Sar (astronomy) , 9 years 5 days, a period separating eclipses SAR 21 , Singapore Assault Rifle – 21st century SAR-87 ( Sterling SAR-87 ), 1980s military assault rifle IPCC Second Assessment Report , 1995 report on climate change Semi-automatic rifle Sodium adsorption ratio , an irrigation water quality parameter Spent Acid Regeneration of sulfuric acid Submarine Advanced Reactor program of USS Triton Successive Approximation Register of

448-614: A molecule Systemic acquired resistance , of a plant to a pathogen Science and technology [ edit ] Sar (astronomy) , 9 years 5 days, a period separating eclipses SAR 21 , Singapore Assault Rifle – 21st century SAR-87 ( Sterling SAR-87 ), 1980s military assault rifle IPCC Second Assessment Report , 1995 report on climate change Semi-automatic rifle Sodium adsorption ratio , an irrigation water quality parameter Spent Acid Regeneration of sulfuric acid Submarine Advanced Reactor program of USS Triton Successive Approximation Register of

476-541: Is different from Wikidata All article disambiguation pages All disambiguation pages SAR [REDACTED] Look up SAR  or sar in Wiktionary, the free dictionary. SAR or Sar may refer to: Places [ edit ] Sar (river) , Galicia, Spain Sar, Bahrain , a residential district Sar, Iran (disambiguation) , several places in Iran Sar, Tibet , Tibet Autonomous Region of China Šar Mountains , in southeastern Europe Sark ,

504-424: Is different from Wikidata All article disambiguation pages All disambiguation pages Successive-approximation ADC The successive-approximation analog-to-digital converter circuit typically consists of four chief subcircuits: The successive approximation register is initialized so that the most significant bit (MSB) is equal to a digital 1. This code is fed into the DAC, which then supplies

532-410: Is higher, then on the next clock cycle, the register changes its value to that illustrated in the figure by following the red line. The simplified structure of this type of ADC that acts on 2 volts range can be expressed as an algorithm: The successive approximation ADC can be alternatively explained by first uniformly assigning each digital output to corresponding ranges as shown. It can be seen that

560-656: Is the digital approximation of the sampled input voltage and is finally output by the SAR at the end of the conversion (EOC). Mathematically, let V in = xV ref , so x in [−1, 1] is the normalized input voltage. The objective is to approximately digitize x to an accuracy of 1 ⁄ 2 . The algorithm proceeds as follows: As shown in the above algorithm, a SAR ADC requires: Example 1: The ten steps to converting an analog input to 10 bit digital, using successive approximation, are shown here for all voltages from 5 V to 0 V in 0.1 V iterations. Since

588-812: The South African Army State Artillery Regiment , an artillery regiment of the South African Army Other uses [ edit ] Sar (surname) Sar , an uthra (angel) in Mandaeism Sar language , a Bongo–Bagirmi language of southern Chad Sample of Anonymised Records , based on the UK population census Special administrative region , territorial entity designation Student Aid Report , sent to applicants of U.S. federal financial aid for college Subject access request , in data protection law Super Animal Royale ,

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616-558: The South African Army State Artillery Regiment , an artillery regiment of the South African Army Other uses [ edit ] Sar (surname) Sar , an uthra (angel) in Mandaeism Sar language , a Bongo–Bagirmi language of southern Chad Sample of Anonymised Records , based on the UK population census Special administrative region , territorial entity designation Student Aid Report , sent to applicants of U.S. federal financial aid for college Subject access request , in data protection law Super Animal Royale ,

644-421: The algorithm essentially divides the voltage range into two regions and checks which of the two regions the input voltage belongs to. Successive steps involve taking the identified region from before and further dividing the region into two and continuing identification. This occurs until all possible choices of digital representations are exhausted, leaving behind an identified region that corresponds to only one of

672-417: The analog equivalent of this digital code ( V ref /2) into the comparator circuit for comparison with the sampled input voltage. If this analog voltage exceeds V in , then the comparator causes the SAR to reset this bit; otherwise, the bit is left as 1. Then the next bit is set to 1 and the same test is done, continuing this binary search until every bit in the SAR has been tested. The resulting code

700-404: The analog input is being compared to the internal DAC output, it effectively is being compared to each of these binary weights, starting with the 2.5 V and either keeping it or clearing it as a result. Then by adding the next weight to the previous result, comparing again, and repeating until all the bits and their weights have been compared to the input, the result, a binary number representing

728-401: The analog input, is found. Example 2: The working of a 4-bit successive approximation ADC is illustrated below. The MSB is initially set to 1 whereas the remaining digits are set to zero. If the input voltage is lower than the value stored in the register, on the next clock cycle, the register changes its value to that illustrated in the figure by following the green line. If the input voltage

756-423: The digital representations. One of the most common implementations of the successive-approximation ADC, the charge-redistribution successive-approximation ADC, uses a charge-scaling DAC . The charge-scaling DAC simply consists of an array of individually switched binary-weighted capacitors. The amount of charge upon each capacitor in the array is used to perform the aforementioned binary search in conjunction with

784-583: The reference voltage is 5 V, when the input voltage is also 5 V, all bits are set. As the voltage is decreased to 4.9 V, only some of the least significant bits are cleared. The MSB will remain set until the input is one half the reference voltage, 2.5 V. The binary weights assigned to each bit, starting with the MSB, are 2.5, 1.25, 0.625, 0.3125, 0.15625, 0.078125, 0.0390625, 0.01953125, 0.009765625, 0.0048828125. All of these add up to 4.9951171875, meaning binary 1111111111, or one LSB less than 5. When

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