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Analog to digital converter

An analog-to-digital converter, digital-to-analog converter technology, applied in the direction of analog-to-digital converter, analog-to-digital conversion, code conversion, etc.

Inactive Publication Date: 2010-02-24
ANALOG DEVICES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However this comes at the cost of having to manufacture three analog-to-digital conversion engines

Method used

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  • Analog to digital converter
  • Analog to digital converter
  • Analog to digital converter

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Embodiment Construction

[0028] figure 1 An analog-to-digital converter constituting one embodiment of the present invention is schematically illustrated. The analog-to-digital converter comprises a first digital-to-analog converter DAC1, which may be formed using any suitable converter technology, but in this example is a switched capacitor digital-to-analog converter, since such a converter can also perform The task of converting the analog input signal. The converter may or may not be segmented, which is at the designer's choice, and may be single-ended or have differential outputs. For simplicity, we will assume that the converter is single-ended. The first digital-to-analog converter DAC1 has its output connected to first to fourth comparators 10, 30, 50 and 70 via first to fourth capacitors 12, 32, 52 and 72, respectively, said comparators having outputs C1 to C4. In the preferred embodiment of the invention, the use of four comparators allows the decision space to be expanded, although, as...

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Abstract

An analog to digital converter is provided in which the outputs of first and second digital to analog converters DACl and DAC2 are combined in a combining circuit so as to form a plurality of decision thresholds. This enables two or more bits to be determined in a single trial.

Description

technical field [0001] The present invention relates to an analog-to-digital converter, and more particularly to a converter which can determine a plurality of bits per bit test. Background technique [0002] Users of digital-to-analog converters typically want high conversion accuracy and high conversion rates. [0003] Flash converters and pipeline converters are known to provide high conversion speeds. Flash converters convert input words in a single entry and exhibit relatively small conversion delays, while pipelined converters segment the conversion process into multiple steps, thereby achieving high throughput at the expense of pipeline delays and complex at the expense of increased speed. [0004] A particularly popular type of ADC is the successive approximation converter. This converter is a good compromise between cost and speed and can be very accurate. Successive approximation converters perform successive bit tests so that once the bit being tested is set, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/14
CPCH03M1/144H03M1/468H03M1/804
Inventor 克里斯托弗·彼得·赫里尔
Owner ANALOG DEVICES INC
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