An arrangement wherein for increasing the effective capacitance of a capacitor included in an electrical circuit such as, for example, a resonant circuit for the purpose of detuning the latter, a current amplifier having a high output impedance and a low input impedance is connected in parallel ...
of the conductivity in an ac circuit, and is the reciprocal of impedance. Admittance and impedance in an ac circuit are similar to conductance and resistance in a direct current (dc) circuit. In this chapter, the term capacitance level sensor will be used Figure 8-1: Click on figure to e...
In one such method the time required for the output voltage of an operational amplifier having a capacitor as a feedback component to increase to a value equal to the step-function input voltage applied through a resistor to its input is determined by an electronic voltage-comparison circuit and...
sum over a plurality of lines carrying a current of the AC current generator, an electric signal which depends on generator voltages present at the AC current generator with respect to earth potential and which is in phase with a leakage current component of the differential current is generated...
Parasitic capacitance lurks behind every corner of an electronic circuit. FET gates, cabling, ground and power planes all add to the farad bottom line. When the capacitive load gets heavy in high speed circuits, careful op amp selection is paramount for optimizing slew rate, current output capabi...
Then, an impedance bridge type of circuit is used to measure the change in capacitance with gap motion, h. View chapterExplore book Scaling electromechanical sensors down to the nanoscale Michael A. Cullinan, ... Martin L. Culpepper, in Sensors and Actuators A: Physical, 2012 2.4 Capacitance ...
This simplified capacitor is also chosen as the electronic circuit symbol for a capacitor is a pair of parallel plates as shown in Figure 1. Figure 1. The symbol for an unpolarised capacitor.Normally, electrons cannot enter a conductor unless there is a path for an equal amount of electrons...
Capacitors can be formed in the semiconductor materials of an integrated circuit (also called an IC or chip) in much the same way. Sometimes, IC diodes are fabricated to serve as varactors. Another way to make a capacitor in an IC is to sandwich an oxide layer into the semiconductor materi...
An interface circuit for measuring very small capacitance changes in capacitive sensors PROBLEM TO BE SOLVED: To detect capacitance of a plurality of sensor electrodes, simultaneously or separately. DMG Preethichandra,K Shida - 《電気学会研究会資料. im, 計測研究会》 被引量: 0发表: 1999年 capac...
Usage of new AC-based capacitance tomography system in experiment A new AC-based capacitance measurement circuit has a high sensitive,it could measure as small as 0.01pF capacitance with error 0.0002pF,and could collect t... H Wang,S Liu,W Yang,... - 《Chinese Journal of Scientific ...