Research on the Compound Frequency Tracking Mode of Ultrasonic Power Based on DSP

2014 ◽  
Vol 1027 ◽  
pp. 257-261
Author(s):  
Chang You Li ◽  
Xiao Qian Wu ◽  
Ming Ming Jia
Keyword(s):  
Phase Locked Loop ◽  
Phase Detector ◽  
Ultrasonic Power ◽  
Frequency Range ◽  
Frequency Tracking ◽  
Digital Phase ◽  
Tracking Mode ◽  
Tracking Technology ◽  
Tracking Strategy ◽  
Modal Resonance

Aiming at the problem that the tracking frequency range of ultrasonic power is fixed, and the accuracy of tacking frequency is low, the tactics of digital phase-locked loop frequency tracking technology combined with changing step searching circuit peak is proposed. The frequency tracking is achieved by combining the advantages of digital phase-locked loop frequency tracking technology with changing step searching circuit peak, building the digital phase detector circuit and current effective value converter circuit, taking the feedback of sampling the phase and circuit peak as basic of frequency tracking. Build the simulating model in Multisim. The experiment results show that composite frequency tracking strategy can effectively achieve frequency tracking and dynamically lock transducer multi-modal resonance.

scholarly journals Design of All Digital Phase Locked Loop for Wireless Applications

2018 ◽  
Vol 7 (3.12) ◽  
pp. 836
Author(s):  
Swetha R ◽  
J Manjula ◽  
A Ruhan bevi
Keyword(s):  
Frequency Synthesizer ◽  
Phase Locked Loop ◽  
Cmos Technology ◽  
Phase Detector ◽  
Ring Oscillator ◽  
Frequency Range ◽  
Loop Filter ◽  
Wireless Applications ◽  
Digital Phase ◽  
Operating Frequency Range

This paper presents a design of All Digital Phase Locked Loop (ADPLL) for wireless applications. It is designed using master and slave Dflipflop for linear phase detector, counter based loop filter and ring oscillator based Digital controlled oscillator(DCO). The programmable divider is used in the feed-back loop which is used has a frequency synthesizer for wireless applications. It is implemented in 180nm CMOS technology in Cadence EDA tool. The proposed ADPLL has locking period of 50ps and the operating frequency range of 4.7GHz and power consumption of 26mW. 

Research on the Frequency Automatic Tracking in Ultrasonic Power Based on Fuzzy-DPLL

2013 ◽  
Vol 760-762 ◽  
pp. 1053-1057 ◽  
Author(s):  
Bai Da Qu ◽  
Zheng Long Ni
Keyword(s):  
Control Strategy ◽  
Power Supply ◽  
Fuzzy Controller ◽  
Design Method ◽  
Sudden Change ◽  
Phase Locked Loop ◽  
Ultrasonic Power ◽  
Frequency Tracking ◽  
Working Principle ◽  
Vibrate System

Traditional frequency-tracking technique of ultrasonic power often adopts analog phase locked loop circuit. But it has some defects, such as the narrow locked-inrange and the tendency to lose phase locked with a sudden change in load, etc. Therefore, this paper proposes a composed control strategy which combines a digital fuzzy controller with phase locked loop in DSP, and the working principle and design method are gived. The experimental results show that the ultrasonic power using Fuzzy-DPLL can realize quick and accurate frequency tracking, and it can make the vibrate system work stably and efficiently, and it improves the efficiency of the power supply.

Frequency Tracking Technology for Dither Mechanism of Laser Gyros Based on Phase Locked Loop

2018 ◽  
Vol 55 (10) ◽  
pp. 101401
Author(s):  
马家君 Ma Jiajun ◽  
谢泉 Xie Quan ◽  
田泽安 Tian Zean ◽  
刘健宁 Liu Jianning ◽  
蒋军彪 Jiang Junbiao
Keyword(s):  
Phase Locked Loop ◽  
Frequency Tracking ◽  
Tracking Technology
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