发明名称 |
ANALOGUE-DIGITAL CONVERTER USING JOSEPHSON DAC AND METHOD THEREOF |
摘要 |
The present invention relates to an analog-to-digital converter (ADC) and an analog-to-digital conversion method employing a Josephson digital-to-analog converter (DAC) into an extremely accurate ADC of a physical metrology grade. The ADC includes: a front end ADC for converting an analog input signal into digital data; the Josephson DAC for receiving the digital data from the front end ADC and converting the received digital data into reference analog voltage; a differential ADC for extracting a difference voltage between a reference analog voltage of the Josephson DAC and an unknown input signal; and a data processor for summing output data of the differential ADC and output data of the front end ADC and outputting the summed result. The present invention enables to realize a highly stable Josephson ADC with little time and low cost, which is more accurate in a long-term as compared to any existing semiconductor measurement unit and has a performance that is rarely changed during a lifespan, by combining a programmable array and an existing semiconductor ADC.
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申请公布号 |
US2009073017(A1) |
申请公布日期 |
2009.03.19 |
申请号 |
US20060298963 |
申请日期 |
2006.07.31 |
申请人 |
KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE |
发明人 |
KIM KYU TAE;KIM MUN SEOG;CHONG YON UK |
分类号 |
H03M1/12 |
主分类号 |
H03M1/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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