Ceramic Resonator Equivalent Circuit

Vfo with ceramic resonator.

Ceramic resonator equivalent circuit.

Inner electrode capacitance fig. Ceralock is mass produced resulting in low cost and high stability. This figure illustrates that the resonator becomes inductive in the frequency range between the frequency fr resonant. Pzt the oscillation mode varies with resonant frequency.

This figure illustrates that the resonator becomes inductive in the frequency range between the frequency fr resonant frequency which provides the minimum. Principles of operation for ceramic resonators. The ceramic resonator is half the size of popular crystal units. A more accurate term for it is piezoelectric resonator.

A ceramic resonator is an electronic component consisting of a piece of a piezoelectric ceramic material with two or more metal electrodes attached. This means it is not basically affected by external circuits or by the fluctuation of the supply voltage. As a resonator device quartz crystal is well known. A crystal oscillator is an electronic oscillator circuit that uses a piezoelectric resonator a crystal as its frequency determining element.

5 4 equivalent circuit for a ceramic resonator in the frequency range of fr f fa fig. Rc oscillation circuits and lc oscillation circuits are also. Equivalent resistance l1. Ceramic resonators equivalent circuit constants.

5 3 electrical equivalent circuit for a ceramic resonator fig. Ceramic resonators use the mechanical resonance of piezoelectric ceramics. Unlike rc or lc circuits ceramic resonators use mechanical resonance. Generally lead zirconium titanate.

A 7 mhz oscillator with a variable crystal oscillator vxo operates very stably but it allows only a small frequency variation approx. In contrast a vfo with an lc resonant circuit can be tuned over a range of several hundred khz but its frequency stability will depend upon its construction. Ceramic resonators utilize the mechanical resonance of piezoelectric ceramics such as lead zirconium titanate pzt. Fig 1 2 shows the symbol for a ceramic resonator.

The impedance and phase characteristics measured between the terminals are shown in fig 1 5. This electrical circuit represents a quartz crystalâ s electrical equivalent near a resonant frequency. 5 5 impedance and phase characteristics for ceramic resonators. There are various resonators that are used for an immense number of applications in the field of electronics.

When connected in an electronic oscillator circuit resonant mechanical vibrations in the device generate an oscillating signal of a specific frequency like the similar quartz crystal they are used in oscillators for purposes such as generating. The table on the right shows this relationship. The impedance and phase characteristics measured between the terminals are shown in fig 1 5. Crystal is the common term used in electronics for the frequency determining component a wafer of quartz crystal or ceramic with electrodes connected to it.