Title :
A design of calibration circuit based on adjustable-phase and adjustable-amplitude synchronous dual-channel DDS technology
Author :
He, Huang ; Shi Yi-Bing ; Li Yan-Jun
Author_Institution :
Dept. of Autom. Eng., Univ. of Electron. Sci. & Technol. of China, Cheng Du, China
Abstract :
The design of a calibration circuit for dual-frequency induction tool is introduced. We put the calibration circuit into calibration signal generation circuit and processing circuit. The former one is based on dual-channel reconfigurable and synchronous DDS technology with adjustable phase difference and adjustable amplitude radio. The latter one is composed of channel selection switch, cascade amplifier, mixer and active band-pass-filter. The experiment result shows that this system can produce stable calibration signal with good signal noise ratio and common-mode rejection ratio to accomplish the scale job.
Keywords :
active filters; amplifiers; band-pass filters; calibration; direct digital synthesis; geophysical prospecting; geophysical signal processing; mixers (circuits); active band pass filter; adjustable amplitude DDS; adjustable amplitude radio; adjustable phase DDS; adjustable phase difference; calibration circuit; calibration signal generation circuit; calibration signal processing circuit; cascade amplifier; channel selection switch; direct digital synthesis; dual channel reconfigurable DDS; dual frequency induction tool; mixer; synchronous dual channel DDS; Adders; Calibration; Circuits; Coils; Conductivity; Frequency synchronization; Induction generators; Instruments; Signal generators; Signal processing; DDS; calibrationt; dual frequency induction tool; synchronous dual channel;
Conference_Titel :
Electronic Measurement & Instruments, 2009. ICEMI '09. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3863-1
Electronic_ISBN :
978-1-4244-3864-8
DOI :
10.1109/ICEMI.2009.5274787
