The application note presents information about stability, oscillator, sensor, oscillation frequency, oscillation waveform, the signal flow, circuits, and phase. There are many info around characteristic, sensors, capacitive sensors, level sensor, characteristic equation, circuit design, the oscillation frequency, and circuit design equations are presented inside the application note.
Inside the application note you can get description such as oscillator circuits, operational amplifiers, equation, frequency, comparator, circuit, the characteristic equation, and amplifier. These are some excerpt from this application note:
Operational amplifier (op amp) oscillators can be used to accurately measure resistive and capacitive sensors. Oscillator design can be simplified by using the procedure discussed in this application note. The derivation of the design equations provides a method to select the passive components and determine the influence of each component on the frequency of oscillation. The procedure will be demonstrated by analyzing two state-variable RC op-amp oscillator circuits. The ratio oscillator provides an output frequency that is proportional to the square root of the ratio of two capacitors (i.e., freq. ∝ (C 4 / C3)1/2).
Furthermore, the application note contains information around operational amplifier, amplifiers, system, oscillators, block diagram, oscillator signal, and oscillator circuit.