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| A SIMPLE RC-CIRCUIT FOR CHECKING THE CHARACTERISTICS OF DUAL-FREQUENCY IP INSTRUMENTS |
| FU Guo-hong1, HE Ji-shan1, CHEN Yi-ping1, YANG Tian-chun2 |
1. School of Info-Physics and Geomatics Engineering, Central South University, Changsha 410083, China;
2. Civil Engineering College, Hunan University, Changsha 410082, China |
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Abstract Dual-frequency IP instrument is a kind of precise electronic instruments, and its error has strong influence to survey results. In order to check the characteristics of dual-frequency IP instruments, the authors have designed a simple RC-circuit. The authors have done the simulation test, and gotten satisfactory results.
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Received: 04 November 2003
Published: 24 October 2004
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