In Russia and abroad, the quartzgenerator of domestic production. The product meets the demand in the domestic market of the country both in terms of quality and quantity. Morion Joint-Stock Company has long been engaged in its manufacture and production. Let's consider some types of models.
The generators are divided into precision thermostated and thermocompensated.
The first, having a modest size, differoutstanding indicators on energy consumption, reliability in difficult working conditions and low cost. A large group consists of thermostated instruments. A quartz oscillator from this group can be made on the basis of a resonator with internal thermostatting (or a resonator of a PT thermostat), and also with the aid of Raman scattering in vacuum housings made of metal with external thermostating.
Let us consider individual generators within this group.
The quartz generator based on RT is the firstprecision apparatus of the plant. It has high thermal insulation and the connection of the heater with the piezoelectric element. The device is very economical in energy consumption and is quickly turned on. In addition to these main advantages, it has the following properties:
You can also name a combined heater,which is able to consume energy in both steady-state and transient modes. This is a feature that also has a quartz oscillator. The diagram of the device can be the same as in the photo below.
A little less economical are these speciesgenerators. They are inferior in terms of speed of transition to the operating mode. At the same time, they have other significant advantages: better temperature stability of the frequency and smaller size. In addition, such a quartz generator is not as laborious as the previous one, and at the same time more technological.
By frequency stability, the spectrum of the device andThey are also inferior to generators based on RT. But the merits can be considered very small size and much lower cost. The smallest device is the GK118-TC model, whose dimensions are 20/20/10 mm.
Among such generators one can find those thatare used for SMD-technology. Such devices are characterized by even greater energy consumption, since they do not have such good thermal insulation properties.
The design of this device is optimized forheat fluxes. To increase the accuracy of maintaining a stable temperature, corrective elements have been added to the system, which react to the temperature change.
Devices with a two-stage thermostatic control over the parameter of temperature stability of the frequency are surpassed not only by generators with single-stage thermostating, but also by rubidium species.
With the development of wireless technologies, the generators were brought to the necessary standards and continued to solve new tasks of a time-frequency nature.
To master new frequencies in radio electronicsthere were corresponding requirements, which the quartz generator had to satisfy. Frequencies increased, and with them phase noise increased. This caused the creation of new low-noise high-frequency devices.
With an increase in the Raman frequency, the thickness of the piezoelectric elementdecreases, and this, in turn, causes a prolonged unstable frequency. But if the number of the harmonic of the resonator is increased, suppression of the excitation of modes and harmonics, which are undesirable, is difficult.
When two devices are combined in one devicegenerator, connected by a system of phase-locked frequency control, at different frequencies they can combine low FSH in the far zones, which is further reduced in the near zones, as well as long-term temperature stability of the frequency. The quartz high-frequency oscillator here becomes controllable and adapts to the low-frequency reference. The PLL then includes either a divider or a frequency multiplier. The thermostatting of the high-frequency mechanism is carried out in one design with a low-frequency one. Due to this, the frequency stability and spectral characteristics are substantially improved.
This group of generators is inferiorThe above is based on the frequency stability and phase noise level. But these devices require less energy consumption, and also benefit from the speed of transition to operating mode and overall dimensions.
Resonator in thermocompensated generatorworks at the same temperature as in the environment. Due to the possibility of administrative influence, created due to a change in frequency and the ability to achieve values opposite to the intrinsic temperature resonant changes, stability increases.
In the photo below you can see the quartz oscillator on the chip.
JSC "Morion" is one of the world leaders inManufacture of quartz oscillators with the highest stability. In addition to them, precision, thermocompensated, clock, voltage controlled quartz oscillators, as well as resonators and filters are produced.
High sales are maintained both domestically and externally. Not once the company received prizes for a special contribution to the development of electronics and innovative ideas.</ p>