Ceramic Resonator Circuit

You should not worry about the probe s effect on the crystal.

Ceramic resonator circuit.

A ceramic resonator is an electronic component consisting of a piece of a piezoelectric ceramic material with two or more metal electrodes attached. For ceramic resonators equivalent circuit constants fig. A 7 mhz oscillator with a variable crystal oscillator vxo operates very stably but it allows only a small frequency variation approx. The design of the circuit varies with the application and the ic to be used etc.

Similar to the crystal oscillator ceramic resonator is also an electronic circuit or a device used to generate an output of oscillation frequency with the help of ceramic as a resonating piezoelectric material. This figure illustrates that the resonator becomes inductive in the frequency range between the frequency fr resonant frequency which provides the. 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. Generally smaller loading capacitance a higher frequency ceramic resonator and a smaller size of ceramic resonator will cause a faster rise time.

I had a rigol dual channel cheapo oscilloscope and had scoped a working board i made previously and the nice 8mhz signal was easily seen with no problem due to loading by the probes. Though this shortwave transmitter circuit can reach barely around 5 meters but you can be increase the range easily with a simple rf amplifier and a low pass filter stage. A ceramic resonator s equivalent electric circuit is identical to a quartz crystal. The 8mhz ceramic resonators were not seemingly working.

Vfo with ceramic resonator. Here is the main circuit configuration. Because its operation is similar to a crystal it can be used in the same oscillator configurations. The material can have two or more electrode which when connected to an oscillator circuit gets mechanical.

What is a ceramic resonator. Rise time is primarily a function of oscillating circuit design. 5 2 shows the symbol for a ceramic resonator. The impedance and phase characteristics measured between the terminals are shown in fig.

This transmitter is very low power and very stable as well uses a readily available 3 terminal ceramic resonator to set the frequency. For example murata offers the ceralock series ceramic resonators. With a ceramic resonator it is defined as the time to reach 90 of the oscillation level under steady conditions as shown in fig 6 1. Although the basic configuration of the circuit is the same as that of a crystal controlled oscillator the difference in mechanical q results from a difference in.

This device has been developed to function as a reference signal generator and the frequency is primarily adjusted by the size and thickness of the ceramic element.