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Analog Motion Sensors
Published in Clarence W. de Silva, Sensor Systems, 2016
The digital potentiometer is a device that can provide digitally incremented resistance or voltage corresponding to a digital command. The range of discrete resistance that it can provide depends on the bit size of the device (e.g., 8-bit device is able to provide 256 discrete values of resistance). The incrementing can be programmed linearly, logarithmically, etc., using a microcontroller or other digital device, depending on the application. It is clear that a digital pot is not a displacement sensor but rather a resistance splitter or voltage splitter. It is mentioned here to avoid any misconception.
Novel CPG algorithm for tracking fast sudden changes based on tangent rule
Published in International Journal of Electronics, 2020
Arman Chahardah Cherik, Hooman Kaabi, Ebrahim Farshidi
In the circuit of simulator one MOSFET (QPV) plays the role of current source and besides sense resistance (Rsense) and high voltage operational amplifier (OP1) controls injected current. The amount of current of QPV is related to voltage of Rsense and this voltage is compared to reference voltage of simulator (Vrefsim) that generated by digital potentiometer (Gr). The controller (uC2) controls the output of Gr based on different weather conditions that is stored in a look-up table.In order to implement the diode of single-diode model to generate intended Voc, a number of diodes (N) are connected in series form. Moreover, RSH and RS are chosen based on PVM specification. The characteristics of PVM simulator are listed in Table 4.
A bridge technique for memristor state programming
Published in International Journal of Electronics, 2020
Mahdi Tarkhan, Mohammad Maymandi-Nejad, Sajad Haghzad Klidbary, Saeed Bagheri Shouraki
If can be generated from a control voltage signal, a voltage-controlled-resistor can be designed. The structure of such a circuit is demonstrated in Figure 4. Transistors NM5, NM6, PM5, and PM6 are utilised to pass the circuit input current to its other side. Based on the fact that this circuit is solely used in the programming phase, the current would be always positive, hence, it is not required to add complementary current mirrors to handle negative current. is a resistor which has a resistance proportional to of the target memristor (i.e. ). This resistor can be realised in chip based on the characteristics of the memristor used in the final product or for broader applications, an analog or digital potentiometer can also be attached externally using dedicated pins. Let us assume that the multiplier’s gain is equal to . Then, the input resistance of the circuit, i.e., can be obtained from the following equations:
Spray-dried thyme essential oil microparticles using different polymeric matrices
Published in Drying Technology, 2021
Gerson Reginaldo Marques, Regiane Victória de Barros Fernandes, Amanda Maria Teixeira Lago, Soraia Vilela Borges, Suzan Kelly Vilela Bertolucci, Annete de Jesus Boari Lima, Diego Alvarenga Botrel
The pH reading of the emulsions was performed directly by electrometric process, using a digital potentiometer (Tecnal Tec‐3MP, Piracicaba, SP, Brazil) with immersion electrode: WPI, Whey protein isolate (pH 6.95 ± 0.02); WPIM, Whey protein isolate and maltodextrin (pH 7.03 ± 0.02); WPIM1C, Whey protein isolate, maltodextrin, and 1% chitosan (pH 7.14 ± 0.01); and WPIM2C, Whey protein isolate, maltodextrin, and 2% chitosan (pH 7.15 ± 0.02). In addition, the emulsions were observed for a period of 4 h, as there was no separation of the phases, the treatments were considered suitable for spray drying, since the process was carried out right after the preparation of the emulsions.