SU788029A1

SU788029A1 - Phase shifting device

Info

Publication number: SU788029A1
Application number: SU792711404A
Authority: SU
Inventors: Анатолий Владиславович Крыжановский; Яков Шаевич Лившиц; Александр Абрамович Рафалович; Алексей Иванович Чертыковцев
Original assignee: Куйбышевский политехнический институт им. В.В.Куйбышева
Priority date: 1979-01-10
Filing date: 1979-01-10
Publication date: 1980-12-15

Description

Изобретение относится к информационно-измерительной технике и может быть использовано при построении компенсационных Фазометров в качестве градуированных и квадратурных фазовращателей для различных Фазоизмерительных схем.The invention relates to information-measuring equipment and can be used in the construction of compensation Phasometers as graduated and quadrature phase shifters for various phase measurement schemes.

Известно фазосдвигающее устройство содержащее два генератора, блок временной задержки и различные логические элементы [1].Known phase-shifting device containing two generators, a time delay unit and various logic elements [1].

Недостаток устройства - значительная погрешность формируемого фазового сдвига, которая определяется нестабильностью частот двух генераторов.The disadvantage of this device is the significant error of the generated phase shift, which is determined by the instability of the frequencies of two generators.

,Известно устройство Формирования квадратурных гармонических колебаний в Широком диапазоне частот, которое содержит в своем составе генератор тактовых импульсов, генератор Функций Уолша и два сумматора [2]., A device is known for generating quadrature harmonic oscillations in a Wide frequency range, which contains a clock generator, a Walsh Function generator and two adders [2].

Недостаток устройства - ограниченные возможности в Формировании фазовых сдвигов с любой степенью точности,.The disadvantage of this device is the limited ability in the formation of phase shifts with any degree of accuracy.

Цель изобретения - расширение функциональных возможностей, которое заключается в установке в широком диапазоне частот заданного фазового сдвига.The purpose of the invention is the expansion of functionality, which consists in the installation in a wide frequency range of a given phase shift.

Цель достигается т^м, что Фазосдви· , содержащее генераУолша, выходы которого входами первого и второго снабжено Формирователем, частоты, первым и вторым счетчиком, резистором, неравнозначноспричем выход форми10 ?5 'гающее устройство тор функций соединены с сумматоров, умножителем триггерами, элементами сравнения, ти и совпадения, рователя соединен с первым входом первого триггера, первым входом счетчика через умножитель частоты и первым входом элемента неравнозначности, второй вход которого соединен с выходом первого и входом второго триггеров, выход которого соединен с первым входом элемента совпадения, второй вход которого соединен с выходом умножителя частоты, а выход со входом генератора функций Уолша, второй вход счетчика соединен с выходом элемента неравнозначности, а выхода соединены с первой группой входов элемента сравнения, вторая группа которого соединена с выходами регистра, а выход со вторым входом первого триггера.The goal is achieved t ^ m, that the Phase drive contains the Walsh generator, the outputs of which are provided with the inputs of the first and second shapers, frequencies, the first and second counter, resistor, uneven , ty and coincidence, the rover is connected to the first input of the first trigger, the first input of the counter through the frequency multiplier and the first input of the discontinuity element, the second input of which is connected to the output of the first and the input of the second gerov, whose output is connected to the first input of the coincidence element, the second input of which is connected to the output of the frequency multiplier, and the output to the input of the Walsh function generator, the second input of the counter is connected to the output of the disambiguation element, and the output is connected to the first group of inputs of the comparison element, the second group of which connected to the outputs of the register, and the output with the second input of the first trigger.

На чертеже представлена структурная схёма устройства.The drawing shows a structural diagram of the device.

Фазосдвигающее устройство содержит формирователь 1, первый триггерThe phase shifting device comprises a driver 1, a first trigger

2, умножитель 3 частоты, элемент 4 неравнозначности, второй триггер 5, элемент 6 совпадения, счетчик 7, элемент 8 сравнения, регистр 9, генератор 10 функций Уолша,'первый и второй сумматоры 11 и 12.2, frequency multiplier 3, disambiguation element 4, second trigger 5, match element 6, counter 7, comparison element 8, register 9, Walsh function generator 10, 'first and second adders 11 and 12.

Работа устройства происходит следующим образом.The operation of the device is as follows.

Формирователь 1 опорного сигнала преобразует синусоидальный сигнал в меандр, который поступает на первый вход первого триггера 2. В момент времени прихода переднего фронта этого меандра на выходе триггера фиксируется значение 0, т. е. значение, предшествующее моменту прихода переднего Фронта. Поэтому на выходе элемента 4 неравнозначности устанавливается значение 1 и снимается обнуление счетчика 7, который запускается импульсами умножителя 3 частоты. Линейно возрастающий код счетчика сравнивается элементом 8 сравнения с кодом, пропорциональным требуемому фазовому сдвигу, который записан в регистре 9. В момент равенства упомянутых кодов элементом 8 сравнения формируется импульс, поступающий на 'второй вход, вход разрешения записи первого триггера 2 и переписывающий вход ную информацию, т. е. значение 1. При этом на выходе элемента 4 неравнозначности устанавливается 0, а счетчик 7 обнуляется и останавливается. Это состояние счетчика будет продолжаться до момента привода заднего фронта исходного меандра. Работа устройства в этот момент и в дальнейшем’ происходит аналогичным образом. Таким образом, на выходе первого триггера 2 формируется меандр, сдвинутый относительно опорного синусоидального колебания на время &.t, которому отвечает Фазовый сдвиг Δ¹? , равный ’где Т - период сдвигаемого сигнала. Передний фронт сдвинутого меандра устанавливает второй триггер 5 в состояние 1, при этом открывается элемент б совпадения, и импульсы умножителя частоты запускают генератор 10 Функций Уолша, сигналы которого суммируются с определенными весами сумматорами 11 и 12. На выходе этих сумматоров формируются квадратурные гармонические колебания, частота ко торых при надлежащем выборе коэффициента умножения умножителя частоты равна частоте опорного сигнала, а фазовый сдвиг определяется кодом регистра 9. При необходимости изменения фазы колебаний на заданную дискретную величину необходимо ввести код, эквивалентный этой величине, в регистр 9. Полученное значение фазы выходных колебаний будет сохраняться до нового внесения кода в регистр.Shaper 1 of the reference signal converts the sinusoidal signal to a meander, which is fed to the first input of the first trigger 2. At the time of arrival of the leading edge of this meander, the value 0 is fixed at the output of the trigger, i.e., the value preceding the moment of arrival of the front. Therefore, at the output of the element 4 of ambiguity, the value 1 is set and the zeroing of the counter 7 is removed, which is triggered by the pulses of the frequency multiplier 3. A linearly increasing counter code is compared by the comparison element 8 with a code proportional to the required phase shift, which is recorded in register 9. At the moment of equality of the mentioned codes, the comparison element 8 generates a pulse arriving at the second input, the recording enable input of the first trigger 2, and overwriting the input information , that is, the value 1. In this case, at the output of the element 4 of ambiguity, 0 is set, and the counter 7 is reset and stopped. This counter state will continue until the trailing edge of the original meander is driven. The operation of the device at this moment and in the future 'occurs in a similar way. Thus, at the output of the first trigger 2, a meander is formed, shifted relative to the reference sinusoidal oscillation by the time & .t, which corresponds to the phase shift Δ ¹ ? equal to 'where T is the period of the shifted signal. The leading edge of the shifted meander sets the second trigger 5 to state 1, coincidence element b opens, and the frequency multiplier pulses start the Walsh Function generator 10, whose signals are summed with the adders 11 and 12 determined by certain weights. At the output of these adders, quadrature harmonic oscillations are generated, the frequency which, with the proper choice of the multiplier of the frequency multiplier, is equal to the frequency of the reference signal, and the phase shift is determined by register code 9. If necessary, change the phase of the oscillations for a given discrete value, it is necessary to enter a code equivalent to this value in register 9. The obtained value of the phase of the output oscillations will be saved until the code is entered into the register again.

Применение предложенного' устройства позволяет устанавливать фазовый сдвиг с точностью, определяемой выбором разрядности. Выходная величина весьма близка к синусоидальной, которая определяется выбором числа элементарных функций генератора Уолша.The application of the proposed 'device allows you to set the phase shift with accuracy determined by the choice of bit depth. The output value is very close to sinusoidal, which is determined by the choice of the number of elementary functions of the Walsh generator.

Claims

The invention relates to an information-measuring technique and can be used in the construction of compensation phase meters as graded and quadrature phase shifters for various phase-measuring circuits. Phase-shifting devices are known that contain two oscillators, a time delay block, and various logic elements 1. The drawback of the device is significant for the error in the generated phase shift, which is determined by the instability of the frequencies of the two oscillators. A device for forming quadrature harmonic oscillations in a wide frequency range is known, which contains a clock pulse generator, a Walsh Lunker generator, and two adders 2. The drawback of the device is its limited ability to form phase shifts with any degree of accuracy. The purpose of the invention is to expand the functional possibilities, which is to set up a wide range of frequencies for a given phase shift. The goal is that the LASO device, containing the Walsh function generator, the outputs of which are connected to the inputs of the first and second adders, is equipped with a driver, a frequency multiplier, first and second triggers, a counter, a resistor, comparison, unevenness and coincidence elements, and the Shaper output is connected to the first the first trigger input, the first counter input through the frequency multiplier and the first input of the inequality element, the second input of which is connected to the first output and the second trigger input a, the output of which is connected to the first input of the coincidence element, the second input of which is connected to the output of the frequency multiplier, and the output to the input of the Walsh function generator, the second input of the counter is connected to the output of the unequality element, and the outputs are connected to the first group of inputs of the comparison element, the second group of connected to the register outputs, and the output to the second input of the first trigger. The drawing shows a block diagram of the device. The phase shifter contains driver 1, first trigger 2, frequency multiplier 3, unequal element 4, second trigger 5, coincidence element 6, counter 7, comparison element 8, register 9, Walsh function generator 10, first and second adders 11 and 12 The device operates in the following way. The shaper 1 of the reference signal converts a sinusoidal signal into a square wave that arrives at the first input of the first trigger 2. At the time of the arrival of the leading edge of this square wave, the value of O is fixed at the output of the trigger, i.e. the value preceding the time of arrival of the front. Therefore, at the output of the inequality element 4, the value 1 is set and the resetting of the counter 7, which is triggered by pulses of the frequency multiplier 3, is removed. The linearly increasing counter code is compared by a comparison element 8 with a code proportional to the required phase shift, which is recorded in register 9. At the moment of equality of these codes by comparison element 8, a pulse is generated that arrives at the second input, the recording enable input of the first trigger 2 and rewrite the input information, i.e., value 1. At the same time, at the output of the unequal element 4, O is set, and counter 7 is zeroed and stops c. This counter state will continue until the falling edge of the original square wave. The operation of the device at this moment and in the future is similar. Thus, at the output of the first three hera 2, a meander is formed shifted relative to the reference sinusoidal oscillation by time l1, which corresponds to a phase shift s, 4 equal to q4-21G (4A / tX; where T is the perioL of the shifted signal. The leading edge of the shifted meander sets The second trigger 5 is in state 1, the matching element b is opened, and the frequency multiplier pulses trigger the Walsh function generator 10, the signals of which sum1 are matched with specific weights by adders 11 and 12. At the output of these calculators, quadrature harmonics are formed The oscillations, the frequency of which, when the multiplication factor of the frequency multiplier is chosen, is equal to the frequency of the reference signal, and the phase shift is determined by register code 9. If it is necessary to change the phase of oscillations by a predetermined discrete value, you must enter a code equivalent to this value in register 9. The resulting phase value output oscillations will be maintained until a new code is inserted into the register. The application of the proposed device allows the phase shift to be set with an accuracy determined by the choice of bit awes The output value is very close to sinusoidal, which is determined by the choice of the number of elementary functions of the Walsh generator. The invention of the Phasosdvigakee device, comprising a Walsh function generator, the outputs of which are connected to the inputs of the first and second adders, characterized in that, in order to enhance the functionality, it is equipped with a driver, a frequency multiplier, a first and second trigger, a counter, a register, comparison elements, unequalities and match, with the driver output connected to the first input of the first trigger, the first input of the counter via a frequency multiplier and the first input of the unequal element, in The input of which is connected to the output of the first and the input of the second trigger, the output of which is connected to the first input of the CC5 input element / the second input of which is connected to the output of the frequency multiplier, and the output to the input of the Walsh function generator, the second input of the counter to the output of the unequal element, and the outputs connected to the first group of inputs of the comparison element, the second group of which is connected to the register outputs, and the output to the second input of the first trigger. Sources of information taken into account during the examination 1. USSR author's certificate No. 451019, cl. G 01 R 25/04, 1974.

2.Zaitsev G.V. and Romanyuk Yu.A. Generation of arbitrary signals using Walsh functions. works of VNII FTRI. 1973, no. 12 (42), p. 44-57.

-I If.