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| THE DESIGN AND REALIZATION OF THE LOGGING-WHILE-DRILLING RESISTIVITY TOOL BASED ON DIRECT DIGITAL FREQUENCY SYNTHESIS |
| PAN Guang-wei, FENG Ze-dong, HE Yuan, KUANG Li-li, ZHAO Guo-chen, SHI Jun-feng |
| Goaltech Petroleum Technology Co., Ltd., Beijing 100195, China |
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Abstract This paper describes the basic principles of DDS (Direct Digital Frequency Synthesis), and puts forward a hardware design of the mixer used in Electromagnetic Wave Resistivity Tool based on DDS chip. Psipce simulation shows that the system has good reliability and precision.
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Received: 10 February 2011
Published: 10 April 2012
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