5/16/2023 0 Comments Quartzcrystal oscillator apk![]() The elastic displacement field with electrical potential effect can then be calculated as the weighting sum of each eigenmode. Then, we use the mode superposition method to calculate the weight of each eigenmode. We also consider the constant damping terms in the equations of motion. These terms become the forcing terms of the pure elastic equations. By assuming weak piezoelectric coupling, we rearrange the electrical potential to the RHS of the elastic-piezoelectric equations of motion. In this paper, we first solve for the eigenmodes of the AT-cut quartz crystal resonator without piezoelectric effect using the Lee-Brebbia FEA method, based on Mindlin's 2D elastic equations. Several examples of component influence to the oscillator operation are given in this section. In section 4, we will show the capability of ADOQ software to help the designer in checking or improving oscillator circuit design. Both steady state and start– up features are obtained using the non-linear dipolar method. Section 3 shows the details of this method applied to the quartz crystal behaviour analysis. The principle has been widely used in the past and the method presents a renewed interest due to the present computer capability. This method allows to analyse the oscillator behaviour in relatively moderate calculation time. INTRODUCTION Because of the very high circuit Q-factor, the simulation of quartz crystal oscillator fails with classical non-linear time domain simulation method while the dipolar method is well suited to the modelling of very high Q quartz crystal oscillators. The comparison between simulation and experimental results shows a very good agreement. A measurement has been performed to obtain the equivalent non-linear impedance of the amplifier. In this paper, we present an experimental validation of the simulation results provided by ADOQ software. In addition, the program performs accurate oscillator sensitivity calculation to various parameters (component value, supply voltage…). It enables the user to compute the steady state features of the oscillator, namely the oscillation frequency and amplitude as well as the start-up condition for oscillation. The method has been successfully implemented in the ADOQ software. This is achieved by replacing the resonator by a current source and by performing a series of transient analyses of larger and larger amplitudes at the crystal resonant frequency. The main idea is to look upon the amplifier as a non-linear dipole. ![]() ABSTRACT The non-linear dipolar method is a modelling method to accurately simulate quartz crystal oscillators. ![]() You can follow above instructions to install QuartzCrystal Oscillator Free for PC with any of the Android emulators available.1.
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