Analysis and Improvement with Noise Immunity of dq Frame Based Open-loop Phase Detection Scheme

2020 ◽  
Author(s):  
Zhen Tang ◽  
Mingxian Li ◽  
Liansong Xiong
Keyword(s):  
Noise Immunity ◽  
Open Loop ◽  
Phase Detection ◽  
Detection Scheme

scholarly journals Noise Immunity Analysis and Improvement of dq Frame Based Open-Loop Phase Detection Scheme

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1145
Author(s):  
Xiaobo Li ◽  
Mingxian Li ◽  
Hua Chai ◽  
Binbing Wu
Keyword(s):  
High Frequency ◽  
Noise Immunity ◽  
Open Loop ◽  
Fine Tuning ◽  
Frequency Noise ◽  
Phase Detection ◽  
Detection Error ◽  
Pass Filter ◽  
High Frequency Noise ◽  
Grid Voltage

To improve the noise immunity of a dq frame based open-loop phase detection (OPD) under high-frequency noise grid conditions, this paper develops a detailed model to quantitatively evaluate the phase detection error and noise immunity. It is found that the OPD behaves differently in terms of noise immunity when the dq frame is in different angle positions with the grid voltage. When the grid voltage coincides with the d axis, the high-frequency noise has the smallest impact on the phase detection accuracy, and the OPD thus has the strongest noise immunity. Inspired by this conclusion, an improved OPD algorithm is proposed in this paper, which can effectively reduce the phase detection error by fine-tuning the rotation angle of the dq frame to ensure that the angle between the voltage vector and d axis is always close to 0. The improved OPD algorithm has a fast and precise character to detect the phase information with less error and is flexible for application. Under heavy noise grid conditions, it can also effectively shorten the dynamic response time in the phase-detecting process using a low-pass filter (LPF) with a higher cut-off frequency. The correctness of the noise immunity analysis and the effectiveness of the improved OPD algorithm are verified by the simulations and experimental results in MATLAB and RT-LAB.

Phase detection scheme of vibratory gyroscope by 2D driving operation

2001 ◽  
Author(s):  
Heng Yang ◽  
Minhang Bao ◽  
Hao Yin ◽  
Shaoqun Shen ◽  
Bin Xiong
Keyword(s):  
Phase Detection ◽  
Detection Scheme ◽  
Vibratory Gyroscope

scholarly journals Long Channel Keeper Based Open Loop Difference Amplifier Domino For Noise Tolerant Low Power Or Gates

2019 ◽  
Vol 8 (10) ◽  
pp. 3331-3340
Keyword(s):  
Power Consumption ◽  
Noise Immunity ◽  
Cmos Technology ◽  
Logic Circuits ◽  
Open Loop ◽  
High Input ◽  
Noise Tolerant ◽  
Capacitive Loading ◽  
Long Channel ◽  
Or Gate

This paper proposes an open loop difference amplifier with long channel keeper technique for domino logic circuits implemented as wide fan in OR gate. Currently OR gates suffer from high capacitive loading and delays due to such loading. The proposed design uses single stage of comparison and dual keeper arrangement to generate and hold the output logic state. This technique effectively reduces the high input loading from capacitance and manages the power consumption by switching based on the generated difference voltage. As compared to standard footerless domino SFLD, the proposed design OLDA has shown to reduce power consumption by 42% in 64 bit configuration. It has increased average noise immunity by 2.03 times, while maintaining same speed as compared to SFLD. All simulations are done in CMOS technology with 90nm PTM LP models

scholarly journals A New Absolute Phase Detection Scheme

2016 ◽  
Vol 20 (6) ◽  
pp. 253-266
Author(s):  
Sukkharak Saechia ◽  
Chusit Pradabpet ◽  
Jeerasuda Koseeyaporn ◽  
Paramote Wardkein
Keyword(s):  
Phase Detection ◽  
Detection Scheme ◽  
Absolute Phase

Polarization Difference Probing: A New Phase Detection Scheme for Laser Voltage Probing

2004 ◽  
Author(s):  
William Lo ◽  
Nagamani Nataraj ◽  
Nina Boiadjieva ◽  
Praveen Vedegarbha ◽  
Kenneth Wilsher
Keyword(s):  
Integrated Circuits ◽  
External Cavity ◽  
Phase Detection ◽  
Electronic Effects ◽  
External Cavity Laser ◽  
Detection Scheme ◽  
Common Path ◽  
Equivalent Time ◽  
Silicon Integrated Circuits ◽  
New Phase

Abstract A novel laser based technique for waveform probing of integrated circuits is presented. This new technique exploits polarization-dependent opto-electronic effects in silicon integrated circuits to give phase sensitivity via a simple common-path interferometer design. The system utilizes a 10 ps pulse-width mode-locked laser to generate equivalent-time sampling pulses. A custom wavelength-tunable and spectrally matched external-cavity laser diode source is used for noise cancellation. A 20-GHz intrinsic system bandwidth with a 2x lower noise-floor, in comparison to current laser voltage probing technology, is shown.

Digital Signal Processing for Open-Loop Fiber-Optic Gyroscope

2011 ◽  
Vol 291-294 ◽  
pp. 2671-2675
Author(s):  
Wei Zhang ◽  
Yu Zhong Chen ◽  
Zhang Qi Song ◽  
Ming Ye Yang
Keyword(s):  
Digital Signal Processor ◽  
Fiber Optic ◽  
Detection System ◽  
Digital Signal ◽  
Open Loop ◽  
Fiber Optic Gyroscope ◽  
Detection Scheme ◽  
Field Programmable ◽  
Implementation Scheme ◽  
Rate Calculation

Digital open-loop fiber-optic gyroscope detection scheme based on sinusoidal phase modulation is introduced. A novel implementation of the detection scheme is developed with digital signal processor (DSP) and field programmable gate array (FPGA). The design and implementation of the detection system are discussed. Timing control and open-loop signal preprocessing are realized in FPGA. Rotation rate calculation is finished in DSP. Experiments result shows that good performances have been achieved and the implementation scheme is of great practical value.

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