In Russia and abroad, a domestically produced quartz generator is widely known. The product, both in quality and quantity, fully meets the demand in the domestic market of the country. Morion Joint-Stock Company has been engaged in its manufacture and production for a long time. Consider some types of models.
Precision Thermostatic Generators
Generators are divided into precision thermostatic and thermally compensated.
The former, having a modest size, are distinguished by outstanding indicators of energy consumption, reliability in difficult working conditions and low cost. A large group of them are thermostated appliances. A quartz oscillator from this group can be made on the basis of a resonator with internal temperature control (or a resonator of the RT thermostat), as well as with the help of Raman in vacuum housings made of metal with external temperature control.
Consider the individual generators within this group.
Precision instrument
The RT-based quartz generator is the first precision apparatus of the plant. It has high thermal insulation and the connection of the heater with a piezoelectric element. The device is very economical in energy consumption and quickly turns on. In addition to these main advantages, it has the following properties:
- excellent frequency stability;
- low noise;
- low ELF value;
- reliability in harsh conditions.
You can call a combined heater, which is able to consume energy both in steady state and in transition mode. This is a feature that a quartz oscillator also has. The device diagram may be as in the photo below.
Devices with external cavity temperature control
A little less economical are these types of generators. They are inferior in terms of the speed of transition to the operating mode. At the same time, they have other significant advantages: better frequency stability and smaller size. In addition, such a quartz generator is not as labor-intensive as the previous type, and at the same time more technological.
The smallest precision instruments
They are also inferior in terms of frequency stability, device spectrum and efficiency to RT-based generators. But the advantages can be considered very small in size and much lower cost. The smallest device is the GK118-TS model, the dimensions of which are 20/20/10 mm.
Among these generators, you can find those that are used for SMD technology. Such devices are characterized by even greater energy consumption, as they do not have such good thermal insulation properties.
Ultra-precision quartz generator with thermostatic control of one- and two-stage
The design of this device is optimized for heat fluxes. To increase the accuracy of maintaining a stable temperature in the system, correction elements that respond to temperature changes have been added.
Devices with two-stage thermostating in terms of temperature stability of frequency are superior not only to generators with single-stage thermostating, but also to rubidium species.
With the development of wireless technology, the generators were brought to the necessary standards and continued to solve new tasks of the frequency-time nature.
Precision High Frequency Generator
To master new frequencies in radio electronics, corresponding requirements appeared that a quartz generator had to satisfy. Frequencies increased, and phase noise increased with them. This has led to the creation of new low-noise high-frequency devices.
With an increase in the Raman frequency, the thickness of the piezoelectric element decreases, and this, in turn, causes a long-term unstable frequency. But if the number of the applied harmonic of the resonator increases, then the suppression of the excitation of modes and harmonics that are undesirable is difficult.
When two generators are combined in one device, connected by a phase-locked loop, then at different frequencies they can combine low FS in the far zones, which is further reduced in the near zones, as well as long-term temperature stability of the frequency. The high-frequency quartz generator here becomes controllable and adjusts to the low-frequency reference. In this case, either a divider or a frequency multiplier is included in the PLL. Thermostatic control of the high-frequency mechanism is carried out in one design with the low-frequency. Due to this, the frequency stability and spectral characteristics are significantly improved.
Low-noise, highly stable, temperature-compensated devices
This group of generators is inferior to the above in frequency stability and phase noise. But these devices require less energy consumption, and also benefit in the speed of transition to the operating mode and overall performance.
The resonator in a thermally compensated generator operates at the same temperature as in the environment. Due to the possibility of a managerial impact created due to changes in the frequency and ability to achieve values that are opposite to their own temperature resonant changes, stability increases.
In the photo below you can see the crystal oscillator on the chip.
About the manufacturer
Morion JSC is one of the world leaders in the manufacture of reference quartz oscillators with the highest stability. In addition to them, precision, thermally compensated, clock, voltage-controlled quartz oscillators, as well as resonators and filters are produced.
High sales remain both domestically and externally. More than once the company received prizes for its special contribution to the development of electronics and innovative ideas.