RU2607414C2 - Automatic control over quality of quartz generators operation, duplication at failures, indication, suppression of higher harmonics of signal - Google Patents

Abstract

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

Description

Currently, the industry produces reliable components for the construction of various devices that work without failures for a long time. Large computers, personal computers, laptops, and other devices have thousands and thousands of resistors, capacitors, transistors, microcircuits, and other components in their circuits. The main thing is that the recommended modes for current, voltage, temperature and other operating conditions are observed.

But a quartz resonator with outstanding qualities, such as stabilization of the frequency of the oscillator by the generator, when used, has its inherent drawback - "jump" to another, false frequency. About this, for example, it is said:

L. 1. Page 315, 321;

L. 2. Page 10;

L. 3. pp. 13.

And also in all books about quartz resonators.

The essence of this invention is to ensure the operation of electronic devices with a possible "tuning" to the false frequency of the generation of crystal oscillators. It should be noted that a “jump” in the generation frequency occurs when the equipment is in extreme (extreme) conditions, i.e. when the vibration is very large, the temperature rises sharply, solar radiation rises sharply, cosmic radiation and other influences sharply increase.

And then there is the likelihood of a "jump".

For example, in rockets, on Earth satellites or other planets, in spacecraft for various purposes.

There are no analogs to this problem!

Quartz resonators are used in military equipment, in missiles, where quartz resonators are used in radio receivers, radio transmitters, in a frequency synthesizer - in an on-board computer to stabilize the frequency of a clock generator.

The task is to work properly, and if a failure occurs, the crystal oscillator stops working, or if a “jump” to a false frequency occurs, then it automatically switches to the second set of crystal oscillator.

The technical result is to ensure the smooth operation of the radio equipment.

And at the same time, the set of on-board equipment continues to work, which will be reported via telemetry to the command post, which will serve to improve the on-board communication equipment. Telemetry communication reports to the Earth all the data on the state of the rocket, on the precise execution of the flight mission, including the operation of crystal oscillators. Telemetry communication works on a rocket during a flight and on Earth, when preparing for a launch, “checks” all the rocket mechanisms and communication equipment circuits, and an on-board computer. And only when fully prepared does it allow a start.

Since the circuits are similar, the circuit of the radio receiver with quartz oscillators presented for consideration as a local oscillator, automation, computer and transmitter for telemetry communication with the command post. A sample diagram is presented in the section “GRAPHIC MATERIALS”, where:

Figure 1. Connection to the automation of a crystal oscillator with indication 9.

Figure 2. General scheme of duplication.

Figure 2 (A). The band of the sinusoid resonator at the level of 0.707. Figure 2 (B). Determination of the resonator band at any point at which:

1 and 2. Quartz oscillators with two quartz resonators - Heterodyne.

3. The diode.

4. Automation.

5. The load.

6. Power supply of crystal oscillators.

7. Radio transmitter (onboard).

8. Frequency synthesizer - on-board computer.

9. Indicator.

The logic of the automation: when the first quartz oscillator is operating, the potential after the rectifier diode is fed to the automation circuit, the relay contacts are in the first position, the output of the first oscillator is connected to the load R (through the second quartz resonator).

When the first quartz oscillator is turned off, the potential after the diode disappears, which leads to a relay switching, power is supplied to the second quartz oscillator, its output is connected to the load R (via the second quartz resonator).

The transmitter in the master oscillator circuit has its own two quartz oscillators and automatic equipment. A similar circuit in the clock circuit with two quartz resonators in the frequency synthesizer.

Each of the above quartz oscillators 1 and 2 has two quartz resonators (this is described in the “FORMULA” section).

The second quartz resonator is connected: one output to the output of the first quartz resonator, and the second output to the load R, as a result of which an electric quartz filter is formed for the signal between the crystal oscillator and the consuming circuits.

During thermostating, quartz resonators must be placed in the same thermostat or under identical conditions.

Quartz resonators must be of the same type and of the same cut, and also have the same TCR (temperature frequency coefficient).

The frequency band at the output of the quartz resonator 2 is determined at a level of 0.707, formula 1 in figure 2 (A), The frequency band at different levels of the narrow-band quartz filter is determined by the formula 2 in figure 2 (B).

In November 2011, a message was published in the media that, for example, information began to come from the spacecraft indicating the alleged failure.

In this case, the quartz resonator (“hopping”) was malfunctioning, since the power supply and transmitter were working properly and the orientation of the device was correct. This confirms that it was precisely the quartz resonator in the on-board computer clock that could be faulty, since the communication equipment was subjected to various flight effects for a long time.

Duplication of the operation of quartz oscillators ensures the uninterrupted operation of radio equipment in a remote mode.

Literature

1. Valitov R.A. Radio circuits on transistors and tunnel diodes. M .:

Communication 1972.P. 315, 321.

2. Altshuller G.B. Quartz oscillators. Reference manual. M .:

Radio and communication. 1984, p. 10.

3. Labutin B. Quartz resonators. The journal "Radio" No. 3, 1975. S. 13.

Claims (1)

Automatic quality control of the operation of the crystal oscillator in the radio apparatus or frequency synthesizer, suppression of higher harmonics of the signal frequency at the output of the crystal oscillator, indication and duplication of the crystal oscillator when the oscillation is stopped or the oscillation frequency “jumps”, while the crystal oscillator generates a frequency Fo (hereinafter referred to as signal), stabilized the first quartz resonator in the form of a distorted sinusoid, then the signal through the second quartz resonator, having a frequency of parallel resonance Fo, is fed to q circuit, "consuming" the signal, in the form of a sinusoid on the load R, to the input of the indication and to the input of the automation during duplication, which ensures accurate control of the operation of the crystal oscillator, when the crystal oscillator fails or "jumps", then the output of the second crystal There is no signal in the resonator, during a “hop” the signal frequency does not correspond to the resonant frequency of the second quartz resonator and the signal does not pass through it - there is no output.

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