Title :
Acceleration "G" compensated for VCOCXO based on digital controller
Author :
Shan, QingXiao ; Jun, Yang ; Chen, JianYun ; Qian, Tang ; Ji, LongZhe
Author_Institution :
Mechatron. & Autom. Sch., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
The paper proposes a digital compensation by imposing real-time compensation voltage to Vin Pin of VCOXCO while device vibrating. The embedded digital compensating circuit includes a MEMS three-axes acceleration sensor, a FPGA and a D/A converter. G-sensitivity vector can be computed based on the MEMS sensor. A proportion digital compensation model is built to generate voltage which can compensate frequency drift and perturbation caused by acceleration.
Keywords :
compensation; crystal oscillators; digital control; microsensors; voltage control; voltage-controlled oscillators; D/A converter; FPGA; G-sensitivity vector; MEMS three-axes acceleration sensor; VCOCXO; digital compensation; digital controller; embedded circuit; frequency drift; perturbation; real-time compensation voltage; Acceleration; Crystals; Field programmable gate arrays; Micromechanical devices; Oscillators; Sensitivity; Vibrations;
Conference_Titel :
Frequency Control and the European Frequency and Time Forum (FCS), 2011 Joint Conference of the IEEE International
Conference_Location :
San Fransisco, CA
Print_ISBN :
978-1-61284-111-3
DOI :
10.1109/FCS.2011.5977758
