SU970667A1 - Calibrated delay device - Google Patents

Description

(54) CALIBRATED DELAY DEVICE

This invention relates to a radio metering technique and is intended to create SMALL time delays between pulses of two coherent sequences.

A device for forming time intervals is known, comprising a reference oscillator connected to self-tuning rings in two channels, and an adjustable constant voltage source for setting the time offset tl.

The disadvantage of this device is the increased random error associated with the presence of a second channel with auto-tuning.

The closest to the present invention is a frequency error generator comprising three frequency dividers, two pulse drivers, a reference element, a low-frequency phase-determining unit, a low-pass filter, a phase detector, a mixer, an adjustable oscillator, and a reference oscillator, the output of which is connected through the first frequency divider to the input of the first pulse generator and directly, to the input of the second frequency divider, the output of the comparison element connected to the second input, and to the first input of the element with avneni, the output of which is connected via series-connected third frequency divider and a low pass filter to the first input of the mixer whose output is connected to a second input of the phase detector output through the connected generator adjusts 1st to

10 to the input of the second pulse generator and to the vyur input of the mixer, and the first input directly to the output of the low-frequency phase-determining unit t2j.

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A disadvantage of the known device is that the pulse following period and the magnitude of the single time delay discrete can not simultaneously be represented by numbers of the form, where n is any integer number.

The purpose of the invention is to expand the functional capabilities in the synthesis of output parameters and preserve the accuracy characteristics.

Claims (2)

The goal is achieved by the fact that in a calibrated delay device containing three frequency dividers, two pulse drivers, a reference element, a low frequency j phasorodate block, a low-pass filter, a phase detector, a mixer, an adjustable oscillator, and a reference oscillator, the output of which is connected through the first frequency divider to the input of the first pulse shaper, and directly, to the input of the second frequency divider, the output connected to the second input of the comparison element, and to the first input of the comparison element the output of which is connected via a serially connected third frequency divider and low pass filter to the first input of the mixer, the output of which is connected to the second input of the phase detector connected to the output of the second pulse generator and to the second input of the mixer through the output generator and the first input directly to the output of the low-frequency phase-shifting unit; the input of the low-frequency phase-setting unit is connected to the output of the reference element. The drawing shows the function of the flax diagram of the proposed device VA. The device contains a reference generator 1, the output of which is connected through the first frequency divider 2 to the input of the first pulse shaper, a low-frequency phase-generating unit 4 connected to the first input of the phase detector 5 connected to the second input to the output of the mixer 6, and its output through a tunable generator 7 to the second driver of 8 pulses, and to the second input of the mixer b, comparison element 9, connected to the output of the reference generator 1 by the first input directly, and the second through the second frequency divider 10, and the output connected via serially connected third frequency divider 11 and Low-pass Filter 12 to the first input of the mixer b, and directly to the input of the low-frequency phase-down unit 4. The signal of the reference generator 1 with frequency fof- is fed to the input of the body 10 with the division factor N + 1 and the comparison element 9, at the output of which each N + 1 is suppressed is the pulse of the input sequence, the average frequency at the output of element 9 is 1 h N Pg (1 N + 1 og N + 1) 4 and third de Number 11 frequencies, respectively N and N at the output of the low-frequency phase-determining unit, have a city. 1 ff OT M (N -) - l) ° In this case, at the output of the low-pass filter 12, the frequency of the signal is equal to dyTTFrequencies f and f | 2 ARE the reference signals for the phase-locked loop, which includes a tunable generator 7, a mixer b, and a phase detector 5, f /, is a reference signal of high frequency (and f, 4. Low). If the synchronization mode is set in the auto-tuning ring so that the frequency of the adjustable oscillator 7 is equal to the sum of the frequencies of the reference signals, then the output is adjustable Oscillator 7 will be equal to the sum of the frequencies of the reference signals, then on the gateway of the adjustable oscillator 7 we get (N .. (N + i) N + iJ df To ensure that the frequencies at the output of the device are equal, the division factor of the first divider 2 frequencies must also be equal. The output frequency the pulses f will be equal to. ion ISE, .N4-H where the division factor of the first divider. The magnitude of the unit increment of the delay at the output of the device will be equal to 1 1 where tf is the frequency of the traverse pulse; the dividing ratio of the low frequency phase shifting unit. At the frequency of the reference oscillator fof 10 and the dividing ratio N 10, we get by. 1 MHz is not. When the frequency of the reference generator is f 100 MHz and the division factor N 100 is obtained at a frequency of 1 MHz L 0.1 NS, the proposed device is used to create precision time shift sources with standard output parameters used for metrological purposes. Claim device A calibrated delay device comprising three frequency dividers, two pulse drivers, a reference element, a low-frequency phase-determining unit, a low-pass filter, a phase detector, a mixer, an adjustable oscillator, and a reference oscillator whose output is connected through the first frequency divider to the input of the first pulse generator, and directly to. the second frequency divider output connected to the second input of the comparison element, and to the first input of the comparison element whose output is connected via a third divider connected in series (charts and a low-pass filter to the first input of the mixer, the output of which is connected to the second input of the phase detector connected via a adjustable oscillator to the input of the second pulse generator and with the second input of the mixers, and the first an input directly to the output of a low-frequency phase-generating unit, characterized in that, in order to maximize functional characteristics during the synthesis of output parameters and the retention of accuracy characteristics, -. the input of the low-frequency phase-determining block is connected to the output of the reference element. Information sources, 10 taken into account in the examination : 1. CCC copyright certificate . 537324, cl. G 04 F 10/06, 28. 2. USSR author's certificate in application 2884366, cl. H 03 K 5/13 15 02.20.80 (prototype).