The Experts below are selected from a list of 231 Experts worldwide ranked by ideXlab platform
A N Guochen - One of the best experts on this subject based on the ideXlab platform.
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the mathematical model and error analysis of digitally controlled Potentiometers
Electrical Measurement & Instrumentation, 2007Co-Authors: A N GuochenAbstract:Firstly the paper setup the mathematical model of digitally controlled Potentiometers,and the applications of the mathematical model in the programmable gain amplifier and the configuration of the digitally controlled Potentiometers are expatiated,whose operation modes include adjustable resister mode and adjustable voltage divider mode.Then the paper analyses the base error,the temperature error and the noise error,and provides the method to reduce the errors that mentioned above.The mathematical mode and the analysis of the errors have great benefit in analyzing the operation characters of the digitally controlled Potentiometers in analogy circuit or designing programmable analogy circuit.
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Test Technology and Debouncing Circuit Design of Digitally Controlled Potentiometer
2007 8th International Conference on Electronic Measurement and Instruments, 2007Co-Authors: Sha Zhanyou, Yu Guoqing, A N GuochenAbstract:The digitally controlled potentiometer is a kind of new style electronic device, which have good development foreground. It can replace the mechanical potentiometer in many fields. The MCU can program the digitally controlled potentiometer through interface circuit to compose programmable analogy device. The paper provides the principle of the test circuit of the digitally controlled potentiometer, and expatiates the test methods and test data and note items of the test technology. The test parameters include integral nonlinearity error, differential nonlinearity error, the wiper resistance and wiper capacitance. When using the key stroking digitally controlled potentiometer, the debouncing circuit has to be used to avoid the misoperation caused by the bounce. The misoperation will cause that the setup value of the potentiometer is not accordant with the times of key pressing. Analyzing the waveform of the bounce, we find out that the character of the waveform is a kind of high frequency noise. They are sharp pulse or wider pulse, and have some randomness. In the close process, the amplitude of the voltage of the pulses lower and lower, in the end the amplitude reached low level. In the open process the amplitude of the voltage of the pulses higher and higher, in the end the amplitude reached high level. The paper expatiates the debouncing circuit design of the key press digitally controlled potentiometer. The first project is using filter and time delay to avoid the bouncing time. The second project is using software and bouncing judge methods the two projects can be selected in need. The theory and the test methods are all verified and of practical value.
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Programmable Voltage Regulator Design based on Digitally Controlled Potentiometer
2007 8th International Conference on Electronic Measurement and Instruments, 2007Co-Authors: A N Guochen, Sha ZhanyouAbstract:The traditional adjustable linear voltage regulator and switching regulator are both through adjusting the resistance value to change the output voltage. This method has the defaults of low accuracy and not convenience. Using the digital controlled potentiometer but the adjustable resistor, a programmable voltage regulator controlled by computer can be composed. The paper provided three design projects of programmable linear voltage regulator that composed by digitally controlled potentiometer. In the first design project the digitally controlled potentiometer is running in adjustable resistor mode. The second one is adjustable voltage divider mode. And the third design project is using the digital controlled potentiometer to realize the accurate adjust of the output voltage in a small range. Then the paper analyzed the voltage regulation range of the programmable voltage regulator and the stabilized voltage characteristic without load of the voltage regulator and the design note. It is often needed in the field of industry control that a kind of high efficiency, low output voltage digital controlled linear voltage regulator, which can be adjusted exactly in a small range. To meet the need, a kind of programmable accurate low dropout regulator is design by the digital controlled potentiometer and LDO (low dropout regulator). Finally a kind of programmable switching regulator is provided, which is composed by digital controlled potentiometer and adjustable buck mode switching regulator. The voltage regulator not only has the turn off function, which can cause the regulator into stand by mode with low power dissipation, but also the regulator has good protection circuit includes over current protection and overheat protection. The design projects provided are all of practical value.
Sha Zhanyou - One of the best experts on this subject based on the ideXlab platform.
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Test Technology and Debouncing Circuit Design of Digitally Controlled Potentiometer
2007 8th International Conference on Electronic Measurement and Instruments, 2007Co-Authors: Sha Zhanyou, Yu Guoqing, A N GuochenAbstract:The digitally controlled potentiometer is a kind of new style electronic device, which have good development foreground. It can replace the mechanical potentiometer in many fields. The MCU can program the digitally controlled potentiometer through interface circuit to compose programmable analogy device. The paper provides the principle of the test circuit of the digitally controlled potentiometer, and expatiates the test methods and test data and note items of the test technology. The test parameters include integral nonlinearity error, differential nonlinearity error, the wiper resistance and wiper capacitance. When using the key stroking digitally controlled potentiometer, the debouncing circuit has to be used to avoid the misoperation caused by the bounce. The misoperation will cause that the setup value of the potentiometer is not accordant with the times of key pressing. Analyzing the waveform of the bounce, we find out that the character of the waveform is a kind of high frequency noise. They are sharp pulse or wider pulse, and have some randomness. In the close process, the amplitude of the voltage of the pulses lower and lower, in the end the amplitude reached low level. In the open process the amplitude of the voltage of the pulses higher and higher, in the end the amplitude reached high level. The paper expatiates the debouncing circuit design of the key press digitally controlled potentiometer. The first project is using filter and time delay to avoid the bouncing time. The second project is using software and bouncing judge methods the two projects can be selected in need. The theory and the test methods are all verified and of practical value.
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Programmable Voltage Regulator Design based on Digitally Controlled Potentiometer
2007 8th International Conference on Electronic Measurement and Instruments, 2007Co-Authors: A N Guochen, Sha ZhanyouAbstract:The traditional adjustable linear voltage regulator and switching regulator are both through adjusting the resistance value to change the output voltage. This method has the defaults of low accuracy and not convenience. Using the digital controlled potentiometer but the adjustable resistor, a programmable voltage regulator controlled by computer can be composed. The paper provided three design projects of programmable linear voltage regulator that composed by digitally controlled potentiometer. In the first design project the digitally controlled potentiometer is running in adjustable resistor mode. The second one is adjustable voltage divider mode. And the third design project is using the digital controlled potentiometer to realize the accurate adjust of the output voltage in a small range. Then the paper analyzed the voltage regulation range of the programmable voltage regulator and the stabilized voltage characteristic without load of the voltage regulator and the design note. It is often needed in the field of industry control that a kind of high efficiency, low output voltage digital controlled linear voltage regulator, which can be adjusted exactly in a small range. To meet the need, a kind of programmable accurate low dropout regulator is design by the digital controlled potentiometer and LDO (low dropout regulator). Finally a kind of programmable switching regulator is provided, which is composed by digital controlled potentiometer and adjustable buck mode switching regulator. The voltage regulator not only has the turn off function, which can cause the regulator into stand by mode with low power dissipation, but also the regulator has good protection circuit includes over current protection and overheat protection. The design projects provided are all of practical value.
Yeongyu Park - One of the best experts on this subject based on the ideXlab platform.
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Development of a Wearable Sensing Glove for Measuring the Motion of Fingers Using Linear Potentiometers and Flexible Wires
IEEE Transactions on Industrial Informatics, 2015Co-Authors: Yeongyu ParkAbstract:In this paper, a wearable sensing glove for measuring the motion of the fingers is proposed. The system consists of linear Potentiometers, flexible wires, and linear springs, which makes it compact and lightweight so that it does not interfere with the natural motion of the fingers. Inspired by the way wrinkles on finger joints are smoothed out when the finger is flexed, a flexible wire is attached to the back of each finger. As the flexible wire moves due to the motion of the finger, the joint angles are calculated by measuring the change in length of wire. Linear Potentiometers with linear springs were used to maintain the tension of the wires in order to measure the wire length change consistently. Because the motion of the proximal interphalangeal (PIP) joint is dependent on that of the distal interphalangeal (DIP) joint, only two linear Potentiometers were used for each finger. A compact sensing module including 10 linear Potentiometers and springs was attached to a glove. The proposed system can widely be applied for the systems, which require to measure finger motions accurately, e.g., virtual reality or teleoperation systems. Such feasible applications were actually implemented and introduced in this paper.
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Development of a finger motion measurement system using linear Potentiometers
2014 IEEE ASME International Conference on Advanced Intelligent Mechatronics, 2014Co-Authors: Yeongyu ParkAbstract:In this paper, a wearable sensing glove for measuring motion of fingers is proposed. The proposed system consists of linear Potentiometers, flexible wires and linear springs, which make the whole system compact and light not to interfere with the natural finger motion. Inspired by the wrinkles of the finger joints are smoothed when the finger is flexed, a flexible wire is attached on the back of the finger. As the flexible wire is moved by the finger motion, the joint angles are calculated by measuring the length change of the flexible wire. A linear potentiometer with a linear spring for maintaining wire tension is applied to measure the joint angle. Because the motion of the proximal interphalangeal (PIP) is dependent on the distal interphalangeal (DIP) joint, only two linear Potentiometers are applied for each finger. A compact sensing module including ten linear Potentiometers and springs is attached on a glove. By simply wearing the sensing glove, the finger motions can be easily measured with an intuitive program interface.
Heli Jantunen - One of the best experts on this subject based on the ideXlab platform.
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interface circuit for resistive sensors utilizing digital Potentiometers
Sensors and Actuators A-physical, 2007Co-Authors: Mikko Leinonen, Jari Juuti, Heli JantunenAbstract:In this paper an interface for resistive sensors in a bridge configuration is investigated. The interface utilizes digital Potentiometers in order to implement an automatic calibration procedure for the bridge circuit offset. Such an approach facilitates the use of digital signal processing with high flexibility; advantageous in modern instrumentation systems. Commercial digital Potentiometers have a very limited resistance range and therefore this method to overcome the discrete nominal resistance values was developed. The system was simulated mathematically and automatic calibration of the offset voltage was demonstrated with a prototype. An important additional advantage was an increase in resolution compared to a simple potentiometer circuit.
Ranjith Badarmanahalli Siddegowda - One of the best experts on this subject based on the ideXlab platform.
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Design and Construction of Arduino-Hacked Variable Gating Distortion Pedal
IEEE Access, 2014Co-Authors: Anarghya Ananda Murthy, Yatheesha Ranganahalli Beemaiah, Sushanth D. Shandilya, Ranjith Badarmanahalli SiddegowdaAbstract:This paper describes the distortion effects often used in an electric guitar. Distortion is an added effect in an electric guitar, which compresses the peaks of the sound waves produced by the musical instrument, to produce a large number of added overtones, which here is done by rigging up a circuit in collaboration with the Arduino UNO circuit board. The digital potentiometer controlled by the Arduino (microcontroller) was an improvement and was able to produce satisfactory results, as compared with the analog potentiometer without the Arduino control. The complex circuitry of a three-stage distortion circuit with the analog potentiometer was replaced by a digital potentiometer controlled by a microcontroller, with better results. This variable-gating distortion pedal has an added advantage of being compact, light, and inexpensive.
