SU999135A2 - Pulse repetition frequency multiplier - Google Patents

Description

The invention relates to a pulse technique. / Namely, devices, frequency multiplication and tracking changes in the input frequency, and can be used in various radio and technical devices.

According to the main auth. 936372 a pulse multiplying frequency multiplier is known, which contains a phase meter, the first output of which is connected to the first input of the first matching element, the output of which is connected to the input of the first frequency divider, the control generator and the second frequency divider, reversible counter, code to voltage converter, trigger. waiting for multivibrators, delay line and inverters, the second input of the first element of the match, the installation input of the first frequency divider, the 3rd trigger input, the first input of the phase meter, are connected to the internal bus; the course of the delay line and through the first inverter is the second second element, coincidence, and the output of the first element of the coincidence element is connected to the summing input of the reversible counter, the output of the second coincidence element is connected to the subtraction input, and the inputs

the converter code to voltage, the output of which is connected through a serially connected controlled oscillator, the second frequency divider and the first waiting animator is connected to the third input of the second matching element and to the input of the second inverter, the output of which is connected to the second input of the fesadetra, to the K input the trigger 10 is connected to the output of the first frequency divider, to the output is the fourth input of the second coincidence element, while the output of the line is connected to the input of the second standby multivibrator

15 delay to the output - the installation input of the second frequency divider

A disadvantage of the known device is reduced performance with not enough high accuracy clever, since the time taken for the frequency multiplier to enter the tracking mode after the input frequency changes after the end of the fallout interval, i.e. speed multiplier frequency

25 and the storage accuracy of the multiplied frequency from the moment the impulses fall out in the input pulse sequence will depend on the value of the K-division factor of the first decider. With increasing K decreases

speed and accuracy of frequency multiplier.

The purpose of the invention is to increase speed while increasing accuracy.

For this purpose, a following frequency multiplier containing a phase meter, the first output of which is connected to the first input of the first coincidence element, the second output to the first input of the second coincidence element, the output of which is connected to the input of the first frequency divider, controlled oscillator and second frequency divider , reversible pulse counter, code to voltage converter, trigger, waiting multivibrators, delay line and inverters, while the second input of the first match element is connected to the input bus, the setup input is first The frequency divider, the trigger input, the first phase meter input, the delay line input, and the second input of the second coincidence element through the first inverter, and the output of the first coincidence element is connected to the summing input of the reversible counter, the output of the second coincidence element is connected to the subtractor, and outputs - the inputs of the code to voltage converter, the output of which is connected through a serially connected controlled oscillator, the second frequency divider and the first waiting multivibrator is connected to the third input of the second matching element, and to the input the house of the second inverter, the output of which is connected to the second input of the phase meter, and to the K input

the trigger is connected to the output of the frequency divider frequency, the output is the fourth input of the second coincidence element, while the output of the delay line is connected to the input of the second standby multivibrator, and the output input of the second frequency divider is connected to the output, an additional trigger, pulse counter, and the third waiting the multivibrator and the TID element, the first input of which is connected With the output of the first element of the match, the output. - with the summing input of the reversible pulse counter, and the second input - with the output of the third coincidence element, the first input of which is connected to the output of the controlled generator and the account. The input of the pulse counter, the setup input of which is connected to the L input of the additional trigger and the output of the third standby multivibrator, and the output — to the K input of the second trigger, the output of which is connected to the second input of the third coincidence element, while the input of the third standby multivibrator is connected to the output trigger, and the counting factor of the pulse counter is equal to the division ratio of the second frequency divider.

Figure 1 shows the structural diagram of the device; 2-4 are timing charts explaining his work in various modes.

The device contains a controlled generator 1, dividers 2 and 3 frequencies, inverters 4 and 5, elements 6-8

coincidence, phase meter 9, triggers 10 and 11, reversible counter 12 pulses, transducer 13 voltage code, delay line 14, waiting multivibrators 15-17, counter

18 pulses, element 19 OR, input bus 20.

The positive impulse coming from bus 20 (Fig. 2a) on line 14 is delayed by the time required

to trigger a phase meter 9, made on the basis of a trigger with separate inputs 3 and K, and also goes to the inputs of two elements 6 and 7. On the leading edge of this delayed pulse, a short negative pulse is formed on the multivibrator 16 (Fig. 2B), which controls the reset of the splitter 2

Divider 2 divides by

Multiplied by frequency n

VIEW fvMH / N, and starts the multivibrator 15, which forms a positive pulse, the duration of which is chosen from such a calculation that its rear edge appears before the rear edge of the pulse (Fig.2-1) coming from the input bus.

Due to this time relation between the input pulses and the pulses formed by the frequency multiplier (Fig. 2), positive pulses are observed at the output of element 6 (Fig. 2i) and their absence at the output of element 7 during the installation of divider 2 in

zero position by pulses arriving from the input bus.

Depending on the ratio of the frequencies fgj and f-umi, this frequency multiplier operates in three modes.

V. the first mode ,, c, / device. Works as follows.

The falling edge of the pulse coming from the input bus 20 sets the phase meter 9 to the zero state.

This opens the way for the passage of the leading edge of the next input pulse through element 6 (Fig. 2c) and then through the first input of element 19 to the summing input

counter 12.

This will lead to a change in the state of the code recorded in the counter 12, and, therefore, the output of the converter 13 will change the voltage (Fig. 2i), whereby the frequency. generated by generator 1 will increase (Fig. 2K). After that, the pulse coming from the output of the multivibrator 15 and delayed relative to the front of the input pulse sets the phase meter 9 to one state, and the rear edge of the input pulse of the mouth. The phase meter 9 will turn into zero state. The output of the trigger 10 will be maintained at a constant permissive potential for the passage of pulses through the element 7. The invariance of the potential at the output of the trigger 10 will result in that the trigger 11 will also be in a steady state at which from its output to the second input element. 8, the inhibitory potential for the passage of high frequency from the output of generator 1 through element 8 to the second input of element 19 will be continuously applied. The frequency multiplier will work in this mode as long as the ratio with fitMH remains In the second mode, once where K is the division factor of the divider 3, the device operates as follows. . In this mode, for the period following the input pulses (Fig. 3A), the output of the multivibrator 15 to the input of the inverter 4 and the input of the element 7 can reach up to K-1 positive pulses (Fig. 3d) - integer values from the ratio / N fg. The first pulse coming from the output of the multivibrator 15 sets the phase meter 9 to one, but the output of element 7 does not change the logical state (Fig. 3j) due to the presence of an inverted pulse coming from the input bus at its third input 20 and a pulse overlapping in duration, coming from the output of the multivibrator 15. Then, with the falling edge of the input pulse, the phase meter 9 is set to the zero state. The second impulse (Fig. 3g) sets the front edge of the phase meter-p 9 to one state. The absence of a blocking signal at the output of the inverter 5 provides the condition for the pulses to pass through the second input of the element 7 to the input of the divider 3 and to the readout of the input of the counter 12. The output of the converter 13 changes the voltage (Fig. Zi) and the output of the generator 1 will decrease the frequency fy / 4 "(Fig. 3k). On the first and third inputs of the element 7, the permissive potential for passing pulses through it before the pulse arrives on the bus 20 will remain. The multiplier in the third mode of operation passes in the case of precipitations in the input pulse sequence (Fig / 4a) when. in this case, from the output of the divider. 2 through the multivibrator 15 to the subtracting input of the counter 12 will receive pulses that reduce the frequency at the output of the generator 1 (Fig.). At the same time, the divider 3 will begin to fill. At the moment of its overflow, an input is received at the input K of the trigger 10, which will transfer the trigger to the opposite state. From the output of the trigger 10 to the input of the element 7, a blocking signal for the passage of pulses to the subtractive input of the counter 12 (Fig. 4m) will arrive. On . on the front of the flip-flop of the trigger 10 a short pulse is formed (Fig. 4c), which the prog triggers to reset the counter 18 and toggle the flip-flop 11. From the trigger 11 output, the second input of the element 8 will receive a resolution potential (fig. 4p) the summing input of the counter 12c of the output of the generator 1 "through the second input of the element 19 (Fig. 48.). After the counter 18 overflows, after counting the K pulses arriving at its input from the output of the generator 1, the trigger 11 will be reset. At the second input of the element 8, the inhibitory potential will come to pass pulses through it from the output of the generator 1 (Fig. 4L and p). Thus, at the output of the counter 12, the code value obtained before the impulses in the input pulse sequence are restored. In this case, the code value and the corresponding frequency at the output of generator 1 will retain their value until the first two pulses appear on bus 20 (Fig. 4K) .. The first pulse sets divider 3 and trigger 10 to the initial state and from the input of element 7 prohibiting potential. The division factor K of divider 3 is determined from the ratio K | B3bii3 bC ,, vH.dAMI where f ... is the maximum expected lAC1K.me and input frequency; - minimum expected input frequency. In order to preserve the value of the multiplied frequency obtained before the impulse deposition time, the counting factor of the counter 18 must be equal to the division factor of the divider 3.

As can be seen from the above description, the frequency multiplier allows, during the period of impulse deposition in the input pulse sequence, to fully preserve the value of the frequency received up to ms of the deposition rate, which in turn increases the response time of entering into the tracking mode for changing the input frequency after the end of the pulse. fallouts and improves the accuracy of this device.

 the invention

The multiplier of the frequency of the pulse following the auth. 936372, tl and h and with the fact that, with the aim of increasing speed with a simultaneous increase in accuracy, a third coincidence element, an additional trigger, a pulse counter, a third waiting multivibrator, and an OR element, whose first input is connected, are introduced into it the output of the first element of the match, the output with the summing input of the reversible pulse counter, and the second input with the output of the third element of the match, the first input of which is connected to the output of the controlled generator and the counting input of the pulse counter, the installation input D which is connected to the 3-input of the additional trigger and the output of the third standby multivibrator, and the output is connected to the K-input of the second trigger / output of which is connected to the second input of the third coincidence element, while the input of the third waiting multivibrator is connected to the trigger output, and the count ratio of the counter pulses equal to the division ratio of the second frequency divider.

Sources of information taken into account in the examination

1. USSR author's certificate 936372, cl. H 03 B 19/10, 10.10.80

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Claims (1)

The claims 15 Multiplier 'pulse repetition rate for autosw. No. 936372, which is due to the fact that, in order to improve performance with jo while increasing accuracy, a third coincidence element, an additional trigger, a pulse counter, a third waiting multi-vibrator and an OR element are introduced into it, the first the input of which is connected to the output of the first coincidence element, the output is to the summing input of the reverse pulse counter, and the second input is the output of the third coincidence element, the first input of which is connected to the output of the controlled generator and the counting input of the pulse counter, setting input for which it is connected to the 3-input of the additional trigger and the output of the third standby multivibrator, and the output to the K-input of the second trigger, the output of which is connected to the second input of the third coincidence element, while the input of the third waiting multivibrator is connected to the output of the trigger, and the counter coefficient pulses equal to the division coefficient of the second frequency divider.