Generally, quartz crystal inductance frequency pulling in oscillators is very low and therefore is not often used in practice. The new method of improving frequency pullability uses inductance to compensate for quartz stray capacitances. To this end, a special AT fundamental quartz crystal working near the antiresonance frequency is selected. By modifying its equivalent circuit with load induct...

A novel method for measuring very small capacitance changes based on capacitance-to-phase angle conversion is introduced in this article. This new method is the improved or linearized version of the nonlinear capacitance-to-phase angle conversion method. The main features of this scheme are the very good linearity, extremely high stray immunity and a very high resolution. The experimental resul...

Starting-up of photovoltaic (PV) inverters involves pre-charging of the input dc bus capacitance. Ideally, direct precharge of this capacitance from the PV modules is possible as the PV modules are current limited. Practically, the parasitic elements of the system such as the PV module capacitance, effective wire inductance and resistance determine the startup transient. The start-up transient ...

We present an analytical expression for the spectral density of the current Sowing through a one-dimensional array of identical small-area tunnel junctions. Negligible stray capacitance, zero temperature, and the voltage close to Coulomb blockade threshold mere assumed. Single-electron oscillations appear explicitly (i.e., their linewidth becomes less than the average frequency) when the number...

Conditioning a current source using OCCII-GIC for EIT systems Ali Zarafshani, Thomas Bach, Wei Wang and Chris Chatwin Instrumentation and Hardware, Bioelectrical Research Group, Engineering and Design, University of Sussex, England, BN19QT Sensatech Research, Brighton, England, BN2 0GP [email protected] Abstract: A multi-Frequency EIT has been developed to evaluate the permittivity spec...

The present paper describes the development of a low cost, highly accurate low capacitance measurement system that can be used over a range of 0 – 400 pF with a resolution of 1 pF. The range of capacitance may be easily altered by a simple resistance or capacitance variation of the measurement circuit. This capacitance measurement system uses quad two-input NAND Schmitt trigger circuit CD4093B ...

This new LCR Meter is especially designed for measurements of low-value components in integrated circuits and thinJilm hybrid circuits, as wellas of discrete components. /t uses a four-pair measurement technique to reduce errors caused by stray capacitance, residual inductance, and mutual inductance of the tesf /eads. T N THE MANUFACTURE of integrated circuits, I good process control is essenti...

 We propose a circuit to directly connect a differential capacitive sensor to a microcontroller unit (MCU), which is based on the charge-transfer method and does not need any calibration component. The performance has been tested by emulating the differential capacitive sensor with discrete components. The major uncertainty sources are residual stray capacitances. The maximal deviation obtaine...