SU1307598A1 - Device for correcting time scale - Google Patents

Abstract

The invention relates to radio engineering and can be used in synchronizing devices and time storage of autonomous devices. The purpose of the invention is to improve the accuracy of correction by expanding the working range. The device contains a generator 1, a phase-shifting unit (FSB) 2, a divider 3 frequencies, an electronic switch (EP) 4, matching elements (ES) 5, 12, counters 6, 10 pulses, adder 7, shift register 8, code converter 9 correction, the decoder 11, the driver 13 of the control signal, the element OR 14, the driver 15 single pulses. Korrek Correction (L O O O JV CO 00 Fi. 1

Description

The time scale qi is produced in two stages: roughly and accurately. In the first stage, acc. the command arriving at the OR 14 element is set to device units in the initial state. At the same time, the output of the EP 4 passes pulses from the divider 3, and the output of the imager 13 is set to the level O, the correction code, in the form of direct and inverse codes, the input to the converter 9 is written to the register 8. The counter 10 counts the number of code bits . As soon as all N bits of the code are recorded, the output of the decimator 11, and then the output of the ES 12 appears 1, and the driver 13 forms a control signal.

one

The invention relates to radio engineering and instrument making and can be used in synchronizing devices and time storage of autonomous devices.

The purpose of the invention is to improve the accuracy of the correction of the time scale by expanding the working range.

Fig. 1 shows the structural electrical circuit of the device for correcting the time scale; 2 and 3 are timing diagrams explaining its operation.

The device for correcting the time scale contains a generator 1, a phase-shifting unit 2, a divider 3 frequencies, an electronic switch 4, the first element 5 matches, the first counter of 6 pulses, an adder 7, a register of B shift, a converter, 9 correction codes, the second a pulse counter 10, a decoder 11, a second coincidence element 12, a control signal generator 13, an OR element 14, and a single pulse generator 15.

The device for the correction of the time scale works as follows.

The generator 1 is a source of stable frequency pulses (Fig. 2h) for the start of the phase-shifting unit 2, which is designed as a frequency divider with a variable division factor. In the initial state, the division factor is equal to K, which is determined in which in FSB-2, made in the form of a frequency amplifier with a variable coefficient. division, the coefficient changes, division, and the counter 6 receives a pulse CF with EP 4, As Tonf.Ko in the counter 6 will appear the recorded code, respectively. the correction value, at the output of the adder 7, the level O is formed. As a result, with the FSB 2 the initial coefficient is restored. division. The coarse correction is made, eu and the measured departure of the autonomous scale E of the belt exceeds the exact correction range. At the second stage, the correction is similar. At the same time, pulses with FSB 2 are transmitted to the EP 4 output. Blocks 4, 7, 12, 14. 3 Il are inserted.

the first control input of the phase-shifter unit 2 is level O. From the output of the phase-shifter unit 2, pulses are applied to the input of the divider 3

(Fig.2i). Divider 3 divides the frequency of the signals arriving at its input.

Correction of the time scale in two stages: roughly and accurately.

 For a rough correction of the time scale, a command is sent to the first command bus of the device connected to the second input of the OR 14 element (Fig. 42a). The command through the element OR 14 is blunt on the input of the former 15, at the output of which a single pulse is formed (Fig. 2b). This impulse pos. blunt to the inputs of the installation of the first 6 and second 10 counters and resets

 their. At the same time, level 1 (Fig. 2g) appears at the output of the adder 7, and level O (Fig. 2d) appears at the output of the decoder 11. These signals are fed to the inputs of the coincidence element 12, at the output of which the level O is maintained (fig.2d). From the output of the element 12, coincidence O is fed to the second input of the imager 13. At the output of the for-, the former 13 is maintained

O (Figure 2e).

To bus The device correction code, i.e. To the input of the converter 9, an N-bit pulse binary correction code is supplied by high-order bits in two lines in the form of forward and inverse codes. The low-order code contains information on the sign of the correction, and in high-order (N-1) bits dah - the amount of correction. At the information output of the converter 9, the inverse correction code is forked, and at the clock output, the shift clock pulses (Fig. 2c). The correction code is written to shift register 8. At the same time, the second counter 10 counts the number of clock pulses of the shift, i.e. the number of code bits written to shift register 8. As soon as all N bits are recorded in the shift register 8, the output of the decoder 11 is Level 1 (Fig. 2d), which arrives at the second input of the coincidence element 12, the first input of which contains Level 1 from the output of the sum of the matrix 7. At the output element 12 coincidence appears 1 (fig.2d), which is fed to the second input of the imaging unit 13, allowing the formation at the output of the last control signal. A control signal in the form of a level 1 appears at the output of the shaper 13 through a cut of the first pulse (Fig. 2c), which came from the output of the electronic switch A to the first input of the shaper 13.

The control signal is fed to the first control input of the phase-shifting unit 2 and changes its coefficient of division to the CC depending on the correction sign fed to the second control input of the phase-shifting unit 2 from the low-order output of the shift register 8. At the same time, the control signal opens an element 5 of coincidence, permitting the passage of pulses from the output of the electronic switch 4 to the counting input of the first counter 6 (Fig. 2k).

At the third input of the electronic switch 4 there is a level 1 coming from the first command input of the device (Fig. 2a). In this case, the output of the electronic switch 4 through the second input passes pulses from the output of the divider 3 (Fig.2i)

The first counter 6 counts the number of pulses received at its input. From the outputs of the bits of counter 6, the binary code is fed to the inputs of the first sender adder 7, the transfer input of which is fed level 1. The inputs of the second term of the adder 7 are fed with the correction value in the reverse code from the outputs (N-1) bits of the register 8 shift. As interpreted in counter 6, the recorded code corresponding to the magnitude of the correction signal appears at the transfer output of the adder appears at the level O (Fig. 2g), which is fed to the first input of the coincidence element 12. At the output of the coincidence element 12, a level O (fig.2d) appears, which returns the shaper 13 to the initial state. At the output of the former 13, a level O (Fig. 2e) appears, which closes the coincidence element 5 and restores the initial division ratio of the phase-shifting unit 2. The gross correction value

At, p tT NK ,,

N K.

where T |. - pulse repetition period at the output of the generator 1; correction amount; division factor in divider 3 from the input to the intermediate output.

The discrete correction group is Tg-K.

Figure 2 shows an example of a rough correction of the time scale with the sign - and K 103.

After a rough correction of the time scale, an exact correction is carried out.

A command is sent to the second command input of the device (Fig. 3a). A pulse from the output of the imaging unit 15 (FIG. 3b) resets the counters 6 and 10 (Fig. 3c, d); Then, the correction code is entered into the device. The time scale is exactly corrected in the same way as a coarse correction. and pulses from the output of the phase-shifting unit 2, and not from the output of the divider, pass to its output 3 (Fig. 3d, e).

Exact correction value

At

POTSN

 ± T N.

Thus, the time scale correction process consists of the following steps: the departure of the autonomous time scale LT is measured; if the departure T exceeds the exact correction range, then a rough correction is made; exact correction is made.

Formula zabreteii

A time scale correction device, containing successively connected generator, phase-shifting unit and frequency divider, successively connected correction code converter and pei-shift unit, the output of which the lower bit is connected to the first control input of the shifting unit phase-phase, to the second control unit - the input of which is connected to the output of the control signal generator, connected through the first element of the joint with the counting input of the first counter of pulses, and also connected in series to the second account IR pulses to the count input of which is connected a clock output transducer correction code, and the decoder, as well as (|) ormirovatel single img1ulsov, characterized in that, in order to increase the accuracy of correction by the time-scale expansion of the operating range of not administered in

the OR element, the first and second inputs of which are the device inputs of the device, the electronic switch and the series-connected adder, to the inputs of the first and second terms of which are connected, respectively, the bits of the first pulse counter and the high-order bits of the shift register, the output of which is connected to the first input of the control signal generator, to the second input of which the second input of the first coincidence element and the output of the electronic switch is connected, to the first the input of which is connected to the first input of the OR element, whose output through the single pulse shaper is connected to the installation inputs of the first and second pulse counters, to the second input of the electronic switch - frequency divider output, to the third input - output of the phase-shifting unit.

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Claims (1)

Claim A device for correcting a time scale, comprising a series-connected generator, a phase-shifting unit and a frequency divider, sequentially connected to 5 a correction code converter and a shift register, the low-order output of which is connected to the first control input of the phase-shifting unit, to the second the input of which is connected to the output of the driver of the control signals, connected through the first matching element to the counting input of the first pulse counter, and also sequentially connected to the second a pulse meter, to the counting input of which the clock output of the correction code converter is connected, and a decoder, as well as a single pulse generator-20 ow, characterized in that, in order to increase the accuracy of time scale correction by expanding the operating range, an OR element is introduced into it, the first and the second inputs of which are the command inputs of the device, an electronic switch and a series-connected adder, to the inputs of the first and second term of which the outputs of the bits of the first account are connected, respectively pulse and high-order outputs of the shift register, and a second coincidence element, the output of which is connected to the first input of the control signal generator, to the second input of which the second input of the first coincidence element is connected; the electronic switch output is connected to the first input of which the first input of the OR element is connected, the output which through a single pulse shaper is connected to the installation inputs of the first and second pulse counter, to the second input of the electronic switch is the output of the frequency divider, to the third input - phase-shifting unit output. ts <o Figure 2 E E E E E E * e ΪΕ E E E E -E E T E t 7