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In order to adjust capacitance, a variable capacitor modifies the surface area of its overlapping plates. A variable capacitor, sometimes referred to as a tuning capacitor, is a kind of capacitor in which the capacitance can be mechanically or electrically altered on a regular basis.
Learn about variable capacitors, essential parts of many electronic devices. Adjustable capacitance makes these capacitors essential for fine-tuning electronic circuits.
Variable capacitors have capacitance values that can be varied by applying voltage to their electrodes. ▼See the series lineup and specifications here. Variable capacitors have capacitance values that can be vari...
Variable capacitance is sometimes used to convert physical phenomena into electrical signals.
One can limit the accuracy of a variable capacitor by understanding the physics of capacitors. A variable capacitor's error is typically proportional to the difference between its rated capacitance and physical size. Reducing the rated capacitance or making the object larger physically will lessen this.
Differential variable capacitors also have two independent stators, but unlike in the butterfly capacitor where capacities on both sides increase equally as the rotor is turned, in a differential variable capacitor one section's capacity will increase while the other section's decreases, keeping the sum of the two stator capacitances constant.
Mehrnezhad et al. [22, 23]. presented a state space model to utilize various methods for control of the MEMS tunable capacitor. The control system could be exploited to …
A current-controlled variable capacitors topology with tran-sistor controlled by a dc current has been employed in a dc–ac power converter of a WPT system to maintain soft-switching
Abstract: Capacitive impedance control enables a power converter to mimic the voltage-current characteristics of a physical passive capacitor actively; however, existing impedance control …
What is a variable capacitor (VAC)? VACs are passive components with capacitance values that can be varied according to the control voltage. They can be considered for applications such as frequency adjustment.
This article proposes a capacitance control method for the variable active capacitor with improved accuracy and robustness. It applies an iterative learning controller to …
In this paper, a new formulation for real-time capacitor control in unbalanced distribution systems is developed. This method employs the exact three-phase unbalanced …
Variable capacitors are often used in L/C circuits to set the resonance frequency, e.g. to tune a radio (therefore they are sometimes called tuning capacitors), or as a variable reactance, e.g. …
A variable capacitor, sometimes referred to as a tuning capacitor, is a kind of capacitor in which the capacitance can be mechanically or electrically altered on a regular basis. Altering the …
Variable caps used for radio tuning have about 1000 times smaller capacitance than needed for guitar tone controls. The advantage of a variable cap, could one be made in …
The motor and the vacuum variable capacitor are connected to each other using a highly insulated (withstand voltage 10 kVp) special coupling. - A cascade connection is possible with …
Abstract Variable capacitors are essential for building tunable RF systems. We present here the design and simulation of novel zipping variable capacitors with a high permittivity dielectric …
This paper describes a method for the estimation of capacitor process variations in integrated circuits and for the subsequent compensation of such variations through a …
OverviewMechanically controlled capacitanceSpecial forms of mechanically variable capacitorsHistoryElectronically controlled capacitanceTransducersNotesExternal links
In mechanically controlled variable capacitors, the distance between the plates, or the amount of plate surface area which overlaps, can be changed. The most common form arranges a group of semicircular metal plates on a rotary axis ("rotor") that are positioned in the gaps between a set of stationary plates ("stator") so that the area of overlap can be changed by rotating the axi…
This paper proposes a novel capacitance control method, which is able to configure the active capacitor with a specified capacitance value. It has the following …
These variable capacitors are known as trimmer capacitors because these capacitors can be used to trim the performance of both active and passive circuits. These …
Variable capacitors have capacitance values that can be vari... What is a variable capacitor (VAC)? VACs are passive components with capacitance values that can be varied according …
The vacuum capacitor (shown to comparitive scale) also has a voltage rating of 5 kV peak, but is variable from 10 to 1000 pF (100:1 range). It is 77.5 mm in diameter at its widest point, and is …
This paper proposes a novel capacitance control method, which is able to configure the active capacitor with a specified capacitance value. It has the following …
This paper describes a method for the estimation of capacitor process variations in integrated circuits and for the subsequent compensation of such variations through a …
The overall aim of this experiment is to calculate the capacitance of a capacitor. This is just one example of how this required practical might be carried out; Variables. Independent variable = time, t Dependent …
Take a look at the difference between a control variable and control group and see examples of control variables. Importance of Control Variables Remember, the independent variable is the one you change, the …
A new VSI ((L'')) is derived and its sensitivity values w.r.t to the control variables are used to decide the optimal control actions. In [15, 16], a real-time preventive …