SU1236600A1 - Generator of time intervals - Google Patents

Abstract

The invention relates to a pulsed technique and can be used in precision time interval shaping devices. The purpose of the invention is to reduce the discreteness of adjustment of the formed time intervals. The device comprises a start-up bus 1, a pulse generator 3, made, for example, in the form of a recirculation generator, selectors 5 and 6, frequency dividers 7 and 8, block 9 of setting the exact code. Introduction to the device unit 10 installation coarse code, pulse generator 4, the source 2 of the microwave oscillations and the formation of new connections between the elements of the device contributes to the achievement of the goal. 2 Il. u soa about:

Description

The invention relates to a pulse technique and can be used in devices for the precision shaping of time intervals,

The purpose of the invention is to reduce the discreteness of adjustment of the formed time intervals.

FIG. 1 shows a functional diagram of the time interval former; in fig. 2 - time diagram of his work.

The device (Fig. 1) contains a startup bus 1, a source of 2 microwave wheels, first and second pulse generators 3 and 4, made, for example, in the form of recirculation generators, first and second selectors 5 and 6, first and second dividers 7 and 8 frequencies, block 9 for setting the exact code, block 10 for setting the coarse code, bus P and 12 Beginning and Ending of the time interval being formed.

The output of the source 2 of the microwave oscillations is connected to the clock inputs of the pulse generators 3 and 4, the triggering inputs of which are combined and connected to the start bus 1.. The output of the pulse generator 3 is connected to the signal input of the selector 5 and to the counting input of the frequency divider 7, the output of which is connected to the control input of the selector 5, and the setup input is connected to the output of the exact code setting unit 9. The output of pulse 1 generator 4 is connected to the signal input of the selector 6 and to the counting input of the frequency divider 8, the output of which is connected to the control input of the selector 6, and the setup input is connected to the output of the coarse code setting unit 10. The output of the selector 5 is connected to the Tina P, and the output of the selector 6 is connected to the bus 12.

Shaper interval time works as follows.

In the initial state, the pulse generators 3 and 4 are in the standby mode, and a highly stable sinusoidal signal from the output of the microwave oscillation source 2 (Fig. 2 (5)) is synchronously fed to their clock inputs (Fig. 2 (5). The signal from the output of the exact code setting unit 9 translates the trigger signal cell divider 7 in the state that ensures the appearance at its output of a g-th pulse from the beginning of the arrival of pulses into its account

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The input, without altering the total N, dividing the divider 7. Similarly, the signal from the output of the block 0 of the coarse code setting O1; there is a transfer of the trigger cells of the divider 8 to the state that provides its output (t + 1 ) th pulse from the beginning of the arrival of pulses on its counting input, without changing the total N coefficient, dividing divider 8. Selectors 5 and 6 3 acryts,

At the moment of the launch of the pulse (Fig. 2a) on the bus, the generators 3 and 4 simultaneously switch to the generation mode of the pulse sequences (Fig. 2 & g) with periods T. (K-1), respectively, and where K is a positive integer, and d is the period of a T. sinusoidal signal of the source of the 2 microwave oscillations. As a result, the clock input of each of the generators 3 and 4 of the sinusoidal signal from the output of source 2 in the pulse generation mode results in a hard synchronization of the phase of the pulse oscillations of each of these generators with the phase of the microwave oscillation. At the same time, the synchronization multiples of the periods of the generator 3 and 4 are equal, respectively, (K-1) and K, and are provided by selecting the period of the pulse generator 3 in the autonomous mode of oscillation to be equal to (K-1) l, and the period of the generator 4 in the analogous mode equal to AC. Due to the phase synchronization of generators 3 and 4 with a single signal, the phase relations between the pulses of the generated sequences with periods T and T are strictly maintained throughout the generation phase, and the stability of the period T, d & guarantees the constancy of the minimum discrete d of adjustment of the formed time intervals in the whole range.

The pulse sequence with period Td comes from the output of generator 3 to the counting input of the divider 7 and to the signal input of the selector 5. When the th pulse arrives at the counting input of the divider 7, the control signal from its output opens the selector 5, and the pulse with the number (t + ) from the output of the generator 3 enters the tire 11, fixing the beginning of the formation

the interval t, after which the sele tor 5 is again blocked.

Similarly, the selection of the (m + 1 + l) th pulse from the generator 4, which goes to the bus 12, fixes the end of the forming interval: (Fig. 2).

The duration of the time interval f is determined by the formula

U: (t + F) d. The division factors N, and N are given by the relations N; КЬ and N (К-1) L, where L is any of the numbers 1, 2, .... In this case, the repetition period T of the formed intervals I is found by the formula

T KLT K (K-) bD.

The continuous overlap of the synthesis range with discreteness D of variable m is sufficient to take values from the set (1, 2, ..., K-1), and the values 1 should be selected from the set of integers in the interval O 1 (). The restriction on the top I excludes the imposition of the formed intervals t when they are repeated with the period TO. In addition, with m K, the result is a range of synthesis set by the boundaries

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0; (K-l) U (L-l) K.

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Editor E. Papp

Compiled by Y. Sibir to

Tehred I.Popovich Proofreader L. Pilipenko

3098/58 Circulation 816

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

By

Production and printing company, Uzhgorod, st. Project, 4

rmula of invention

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The time interval generator, the content of the first-frequency pulse generator, the output of which is connected to the signaling input of the first selector, the control input of which is connected to the output of the first frequency divider, the second frequency splitter whose output is connected to the control input of the second selector, the exact code setting unit The outputs of the first and second selectors are connected to the tires of the Beginning and End of the time interval being formed, characterized in that, in order to reduce the discreteness of the rearrangement of the Ipyemayx time intervals -w, a coarse code setting unit is entered into it, a second impulse generator and a source of microwave oscillations, the output of which is connected to the clock inputs of the first and second impulse generators, triggering inputs of which are combined and connected to the startup bus, the output of the first impulse generator is connected to the counting input of the first frequency divider, the installed input of which is connected to the 11th block of the coarse code setting unit, the output of the second pulse generator is connected to the signal input of the second selector and to the counting input of the second frequency divider, the installation input of which is connected to the output of the installation unit of the exact code.

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Claims (1)

Claim A time interval generator comprising a first pulse generator, the output of which is connected to the signal input of the first selector, the control input of which is connected to the output of the first frequency divider, a second frequency divider, the output of which is connected to the control input of the second selector, an exact code setting unit, the outputs of the first and the second selectors are connected to the buses' Start and End of the generated time interval, characterized in that, in order to reduce the discreteness of the adjustment of the formed time intervals, a coarse code setting unit, a second pulse generator, and a microwave oscillation source, the output of which is connected to the synchronizing inputs of the first and second pulse generators, the trigger inputs of which are combined and connected to the trigger bus, the output of the first pulse generator is connected to the counting input of the first frequency divider, is introduced , the installation input of which is connected to the output of the installation block of the rough code, the output of the second pulse generator is connected to the signal input of the second selector and to the counting input of the second frequency frequency, the installation input of which is connected to the output of the installation block of the exact code. I fig. 2