SU1059654A1 - Three-channel redundant generator - Google Patents

Abstract

THREE-CHANNEL RESERVED Hbat GENERATOR, the contents of each of the channels are connected in series with the first logic inverter, the level converter and the majority element, and the crystal resonator, one output of which is connected to the input of the first logic inverter, and the first resistor, one output of which is connected to the output of the majority element, the second and the third inputs of the majority element of each channel are connected to the corresponding outputs of the level converters of the two other channels, different r & Hf that, in order to increase the generator reliability and reduce the oscillation time, in each of the channels between the output of the majority element and the other output of the crystal, a second logic inverter is inserted, a second resistor is inserted between the other output of the first resistor and the input of the first logic inverter The g of the dinene — the first and second resistors are connected to the common bus across the injected capacitor.

Description

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The invention relates to radio engineering, in particular, to radio transmitting and receiving equipment of communication devices, measuring and computing equipment, as well as to automation.

A generator is known in which redundancy is achieved by using several simultaneous generators connected in ring ij.

The disadvantage of the known generator is that the principle of majority is fulfilled in HeMvHe,

Closest to the offer is a three-channel redundant generator containing in each of the channels a first logical inverter, a level converter and a majority element, as well as a quartz resistor, whose linear output is connected to the input of the first logical inverter and the first resistor, one output of which is connected in series to the output of the majority element, while the second and third inputs of the majority element of each channel are connected to the corresponding outputs of the level converters Vuh other 2 channels.

However, the redundant generator has insufficient reliability and a long time for establishing oscillations.

The purpose of the invention is to increase reliability and. decrease. the establishment of oscillations. . The goal is achieved in that a three-channel redundant generator containing in each of the channels a serially connected first logic inverter, a level converter and a major element, as well as a quartz resonator, one output of which is connected to the input of the first logical inverter and the first resistor, one output of which connected to the output of the majority element, while the second and third inputs of the majority element of each kaneshov are connected to the corresponding outputs of the level converters the other two channels, in each of the channels between the output of the majority element and the other output of the quartz resonator, the second logic inverter is inserted, and the second resistor and the connection point of the first and second resistors are inserted between the other input of the first resistor and the input of the first logical inverter connected to a common bus.

The drawing shows a structural electrical circuit of a three-channel reserved generator.

The three-channel redundant generator1b contains in each channel the first logical inverts 1, a level 2 converter, the majority element Зр the second logical inverter 4, a quartz resonator 5, the first and second resistors 6 and 7, and a capacitor 8.

Three-channel redundant generator operates as follows.

At the initial moment of time after applying the supply voltage, the inputs of the first logical inverters 1 do not exceed the level of logic O and, accordingly, the outputs of the Mc1 majority elements 3 have a voltage of logical H, and the outputs of the second logical inverters 4 have a logical O. The voltages h from the outputs of the major elements 3 through the first resistors 6 are charged capacitors 8, which form an RC filter with the second resistor 7. The voltage from the co-capacitors 8 through the resistors 7 is fed to the inputs of the first logic inverters 1, which ensures their operation in the linear section of the characteristic. When the tripping voltage value is reached, the output voltage of the first lsegicic inverter 1 changes from a logic level to a logic level.

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After the operation of the first logic inverters 1 in two of the three channels to the two inputs of the majority elements 3 through the corresponding pre-. level generators receive signals of logic O, which leads to a change at the output of logical inverter 4 voltage from the level of logic O

to logical level

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The voltage difference (the output voltage of the second logic inverter 4 and the input voltage of the first logic inverter 1) is applied to the quartz resonators as a step function, which causes oscillations of the quartz resonators.

Thus, the time to enter the mode is determined only by the arithmetic mean of the constant time of the QC-Filter and does not exceed 5 ms 1

When the supply voltage of the channels changes, the circuit retains the performance of the three channels through the use of level converters in which active amplifying elements are used, normalizing the input voltages of the micoronitor elements. Thus, optimum operating modes of the majority elements are provided, which increases the reliability of the generators. Mi6. (Quartz resonators with a passband of a high precision of the mastika are not required, frequency tuning of each canape of generators and circuits in the 9TH case has the ability to average the arithmetic meanings of the settings of quartz pe30HaTopoiB.

Claims (1)

A THREE-CHANNEL RESERVATION GENERATOR, containing in each channel a first logical inverter, a level converter and a majority element, as well as a quartz resonator, one output of which is connected to the input of the first logical inverter, and a first resistor, one output of which is connected to the output of the majority element, at this second and third inputs of the majority element of each channel are connected to the corresponding outputs of the level converters of the other two channels, characterized in that, with integer In order to improve the reliability of the generator and reduce the oscillation settling time, a second logical inverter is introduced in each channel between the output of the majority element and the other output of the quartz resonator, a second resistor is introduced between the other output of the first resistor and the input of the first logical inverter, and the first and the second resistor ~ through the introduced capacitor is connected to a common bus. 1,059,654 A