Automatic control over quality of quartz generators operation, duplication at failures, indication, suppression of higher harmonics of signal


H03B5/40 - being a magnetostrictive resonator (H03B0005420000 takes precedence;magnetostrictive elements in general H01L0041000000)

FIELD: physics; technology of manufacturing.

SUBSTANCE: invention relates to automatic control over a quartz generator operation and can be used at frequency hopping for switching over quartz generators in various equipment. Automatic control over quality of quartz generators operation is provided by availability of the first and the second quartz generators with two quartz resonators in each, a diode, an automatic control circuit with relay contacts, a power supply source and a load.

EFFECT: absence of retuning into a false generation frequency, suppression of higher harmonics of the signal frequency at the output of the quartz generator, duplication of the quartz generator at termination its generation or at the generation frequency hopping.

1 cl, 4 dwg

 



 

Same patents:

FIELD: radio engineering, communication.

SUBSTANCE: multichannel quartz-crystal oscillator comprises a link, resistive communication elements, n channels, each consisting of an amplifier, the input and output of which are the input and output of the channel, a power supply, a resistive voltage divider which is connected between the output of the amplifier and a common bus, a frequency-setting element comprising a quartz-crystal resonator, the second lead of which is connected to the tap lead of the resistive voltage divider, wherein the link connects the first leads of the resistive communication elements with the first leads of the frequency-setting elements, and the second leads of the resistive communication elements are connected to corresponding inputs of the amplifiers.

EFFECT: high frequency stability in case of faults and simple device.

1 dwg

FIELD: electricity.

SUBSTANCE: thermostatted quartz generator comprises an outer body, where a printed circuit board is placed with elements of a generator circuit, a printed circuit board with elements of a thermostat circuit, a body for the quartz resonator and the quartz resonator arranged in it, printed circuit boards are fixed in a gapless manner on the opposite sides of the body for the quartz resonator by means of a heat conductive connection and are made of a material with high heat conductivity, the body for the quartz resonator is made of metal or alloy with temperature coefficient of non-linear expansion, which corresponds to the temperature coefficient of linear expansion of the material of printed circuit boards.

EFFECT: increased stability of frequency and reduced time for frequency setting in a wide interval of operating temperatures with minimisation of weight and dimensional parameters.

4 cl, 3 dwg

FIELD: electrical engineering.

SUBSTANCE: frequency-modulated quartz generator consists of five transistors, three resonance circuits, two resistance-capacitance circuits, two varicaps, quartz crystal resonator, paraphrase source of control voltage, two sections of long-distance lines, bias source.

EFFECT: increase of frequency tuning range, decrease of incidental amplitude modulation and increase of steepness for phase-amplitude curve for frequency control of quartz generator.

1 dwg

FIELD: electricity.

SUBSTANCE: device for thermal compensation of a quartz generator comprises a quartz generator, a frequency divider, the first counter, the second counter, the first trigger, the second trigger, a register, the first and second summators, a blocking circuit, resistors, a Schmitt trigger, a capacitor, a thermistor, a microcontroller with the first group of inputs and the second group of inputs.

EFFECT: higher accuracy due to taking into account individual features of a temperature-frequency characteristic of each specific quartz generator, possibility to apply a quartz generator, having any form of a temperature-frequency characteristic out of the possible ones and operating on any harmonic.

1 cl, 2 dwg

FIELD: electricity.

SUBSTANCE: circuit of resonator (X1) excitation on surface waves, besides, the resonator comprises a static capacitance (Co), and the circuit of excitation is designed to supply voltage (Vx) to the specified resonator, comprises a reactive facility (L3), designed for resonation jointly with the static capacitance (Co) of the resonator on a previously determined frequency (Fo) of initial period of excitation of the resonator at the specified voltage, besides, the excitation circuit comprises a passive facility (R3), designed for establishment of oscillations at the specified predetermined frequency (Fo). The generator of oscillations comprises a resonator on surface waves and the excitation circuit for any of the above claims, specified in the formula.

EFFECT: provision of a resonator excitation circuit on surface waves, which makes it possible to start oscillations very quickly, within about a hundred of nanoseconds.

9 cl, 5 dwg

FIELD: electricity.

SUBSTANCE: additionally introduced into the thermostatic controller circuit is a T-shaped resistive loop with thermosensitive resistance playing the role of a compensative temperature sensor. The thermostatic controller allows to compensate for the static error of resonator piezoelectric element steady-state temperature resulting from ambient temperature change and in consequence of non-concurrence of the spatial locations of the resonator piezoelectric element, the temperature sensor and the heating element.

EFFECT: reduction of static error of steady-state temperature and reduction of temperature instability of the fundamental frequency of the output signal of the generator with a single-stage thermostat to a level comparable to temperature instability of the fundamental frequency of the output signal of a generator with a double thermostat combined with smaller dimensions, lower consumed power and lower labour intensity of the thermostatic controller setup.

2 cl, 1 dwg

FIELD: radio engineering.

SUBSTANCE: quartz piezoelectric cell (QPC) is made double-frequency and placed normally to laser diode (LD) beam. On one surface of QPC three interdigital transducers are applied, and on the opposite surface metalized spot is applied. The first interdigital transducer is located adjacent to contact leaf of QPC holder, the second interdigital transducer is located at the angle of 90 to it, the third interdigital transducer is located counterwise to the second interdigital transducer. The first and the second interdigital transducer are connected respectively to the first and the second amplifiers of frequency dynamic factor temperature control scheme the outputs of which are connected to inputs of phase detector (FD). The signal from FD enters the third amplifier the output of which is connected to the first input of voltage comparator the second input of which is connected to output of digital temperature stabilisation microprocessor (DTSMP). Comparator output is connected to input of current amplifier the output of which is connected to the first input of laser diode electronic modulator (LDEM). The output of LDEM is connected to anode of laser diode (LD) the cathode of which is connected with body. To the input of stabilised frequency signal generator oscillations from the first interdigital transducer come. From its output they are fed to multivibrator oscillator input and the second input of DTSMP. To the first input of DTSMP oscillations come from the output of temperature oscillation mode generator to the inputs of which oscillations from the third interdigital transducer are fed selectively.

EFFECT: higher long-term and temperature frequency stability and lower temperature dynamic frequency factor.

3 dwg

FIELD: radio engineering.

SUBSTANCE: device contains evacuated body of quartz resonator, lens quartz piezoelectric cell, two resonantly tuned to stabilised frequency interdigital transducers, electronic modulator, laser diode, focusing lens, stabilized frequency signal generator, temperature mode oscillation generator, microprocessor for digital temperature stabilisation of stabilised oscillations, current amplifier, voltage comparator, multivibrator oscillator, two termistors, frequency temperature dynamic factor regulation scheme containing direct current amplifiers, two low-pass filters, two temperature-sensitive resistance bridges.

EFFECT: increased stability of frequency.

4 dwg

FIELD: electricity.

SUBSTANCE: quartz crystal oscillator includes quartz-crystal resonator, first amplifier inverter, two resistors, second amplifier inverter, capacitor, resistance divider.

EFFECT: accuracy improvement of current compensation for static capacitance of quartz-crystal resonator and decrease of signal transmitted through quartz-crystal resonator in broadband.

2 dwg

FIELD: electricity.

SUBSTANCE: quartz crystal oscillator consists of amplifier inverter, two resistors, quartz-crystal resonator, capacitor and noninverting amplifier.

EFFECT: accuracy improvement of current compensation for static capacitance of quartz-crystal resonator and decrease of signal transmitted through quartz-crystal resonator in broadband.

2 dwg

Crystal oscillator // 2251789

FIELD: radio engineering; generation of electrical oscillations of high frequency stability.

SUBSTANCE: proposed crystal oscillator has dual-turn cut crystal cavity with electrodes for exciting it with perpendicular field; crystal cavity is inserted in amplifier positive feedback circuit; one electrode of crystal cavity is connected to common bus and other one is halved along straight line crossing its center at right angle toward parallel component of working mode polarization vector.

EFFECT: enhanced stability of oscillator frequency.

1 cl, 1 dwg

Crystal oscillator // 2260900

FIELD: measurement technology.

SUBSTANCE: proposed crystal oscillator that can be used in devices where strips of piezocrystal resonators of low figure-of-merit function as transducers has operational amplifier, piezocrystal resonator connected to inverting input of operational amplifier, negative and positive feedback circuits; parallel-interconnected capacitor and resistor are inserted in positive feedback circuit between output and direct input of operational amplifier. Steady operation of this crystal oscillator is ensured within comprehensive variation range of piezocrystal resonator dynamic resistance in absence of inductive components and minimal number of those used for manufacturing this device in integrated design form.

EFFECT: enhanced operating stability of crystal oscillator.

1 cl, 3 dwg

FIELD: radio electronics; crystal oscillators incorporating provisions for temperature compensation and thermostatic control.

SUBSTANCE: proposed device characterized in high Q-factor, flat frequency response characteristic, and steep temperature-frequency response characteristic has piezocrystal component and electronic circuit for exciting resonator in two modes; piezocrystal component is placed at angle of 10° 53' to X axis and minus 30 - 32° to Z axis of piezocrystal.

EFFECT: reduced dependencies of extremum position from cut angle with respect to reference mode and of transient resistance on temperature with respect to heat-sensing mode.

1 cl, 4 dwg

FIELD: electronic engineering; electronic timers.

SUBSTANCE: proposed piezo-crystal oscillator has sealed case, reference oscillator with reference resonator, and temperature sensing oscillator with heat-sensing resonator; piezoids of resonators are accommodated in their respective casings whose size is smaller than that of reference resonator casing; they are in heat contact with the latter; used as heat-sensing resonator is resonator of flexural vibrations lengthwise of rod or that of torsional vibrations about rod length, or resonator of expansion-compression vibrations lengthwise of rod, or that of shear vibrations over wafer outline.

EFFECT: reduced power requirement.

1 cl, 1 dwg

Crystal oscillator // 2301491

FIELD: electronic engineering.

SUBSTANCE: proposed crystal oscillator that can be used to produce electric signals regulated by crystal cavities whose equivalent resistance is over 500 kΩ at static capacitance of about 1 pF and resonant frequency over 6 kHz and has resistor-capacitor bridge circuit is provided with newly introduced inverting amplifier with parallel-connected resistor. Bridge-circuit output is connected to input of other inverting amplifier.

EFFECT: enhanced operating stability of crystal oscillator.

1 cl, 5 dwg

FIELD: radio-electronics, in particular, sources of high stability oscillations, possible use in development of thermostatted generators with piezo-electric resonators.

SUBSTANCE: generator contains external hermetic body with a base, on which first electronic board is held with non-thermostatted elements of generator circuit and heat-distributing chamber which contains base and lid, installed on the base of hermetic body. Thermostatted elements of generator circuit and piezo-electric resonator are positioned on second electronic board, which is mounted in heat-distributing chamber. Third electronic board is positioned on the outside of main side of base of heat-distributing chamber. On the third electronic board, elements of temperature regulator circuit are positioned with temperature sensor and heating elements. Base of heat-distributing chamber is rigidly connected to the lid, external side of main side of which is held on heat-isolating layer, positioned on first electronic board, and internal hollow is filled with material of low heat conductivity.

EFFECT: expanded temperature range with preservation of high stability of frequency and with ensured minimal mass-dimensional characteristics.

2 dwg

FIELD: radio electronics; high-stability oscillation sources; temperature-controlled self-excited oscillators using piezoelectric-resonators.

SUBSTANCE: proposed self-excited oscillator incorporating provision for selecting heat-control temperature at any desired temperature irrespective of extreme points on temperature-frequency characteristic of SC-cut resonator that has quartz-crystal resonator inserted in its oscillatory system or feedback circuit and placed in thermostat accommodating temperature control, temperature sensor, and heater is provided with additional temperature-dependent circuit also disposed in thermostat and used for thermal compensation of oscillator temperature-frequency characteristic within thermostat temperature fluctuation range.

EFFECT: enhanced stability of quartz-crystal oscillator frequency within wide temperature range, reduced requirement to precision of thermostat temperature control mainly for resonators.

2 cl, 1 dwg, 1 tbl

FIELD: electrical engineering; highly stabilized oscillation sources; temperature-controlled oscillators incorporating piezoelectric resonators.

SUBSTANCE: piezoelectric resonator case made of high-conductivity material ensuring uniform temperature field throughout entire plane of piezoelectric wafer at ambient temperature variations functions as heat-distributing chamber of proposed device. Oscillator has external hermetically sealed housing with cover that mounts first printed-circuit board carrying circuit components whose temperature is not controlled and piezoelectric resonator case. Temperature-controlled components of oscillator circuit and piezoelectric resonator case are disposed on opposite main edges of second printed-circuit board secured on heat-insulated spacer provided with recesses to receive resonator case. Space between inner surface of external housing cover and oscillator circuit components is filled with material of low heat conductivity.

EFFECT: reduced mass and size of device at high frequency stability within wide temperature range.

1 cl, 2 dwg

Quartz resonator // 2334352

FIELD: electricity.

SUBSTANCE: resonator of a double-swivel shear contains two electrodes for excitation by a perpendicular field of fluctuations of working modes, and each of electrodes is divided into two parts so, that one of them settles down only in the basic zone, and another is only in the zone of antiphase electric potential on the side of this electrode for the operating frequency, thus a part of the electrodes which are located in the basic zones, are electrically connected each with their output of the resonator, and the remaining parts are connected to the output in such a manner that the electrodes of the opposite sides of the resonator would be connected.

EFFECT: improvement of characteristics of the quartz resonator.

1 dwg, 1 tbl

Quartz oscillator // 2354037

FIELD: electricity.

SUBSTANCE: proposed quartz oscillator has an amplifier, in the positive feedback circuit of which are connected a double-swivel edge quartz resonator with operation mode C and two electrodes for stimulating oscillations using a perpendicular field. One electrode of the resonator is connected to the common bus, and the other is divided into two parts such that, each of them is respectively located in main zone and in the zone of antiphase electric potential on the side of that electrode for the operating frequency. Part of the electrode, located in the main zone, is connected to the output of the amplifier, and its second part is connected to the input of the amplifier.

EFFECT: increased frequency stability of the quartz oscillator.

3 cl, 1 dwg

FIELD: physics; technology of manufacturing.

SUBSTANCE: invention relates to automatic control over a quartz generator operation and can be used at frequency hopping for switching over quartz generators in various equipment. Automatic control over quality of quartz generators operation is provided by availability of the first and the second quartz generators with two quartz resonators in each, a diode, an automatic control circuit with relay contacts, a power supply source and a load.

EFFECT: absence of retuning into a false generation frequency, suppression of higher harmonics of the signal frequency at the output of the quartz generator, duplication of the quartz generator at termination its generation or at the generation frequency hopping.

1 cl, 4 dwg

Up!