SU936447A1

SU936447A1 - Bipulse signal shaping device

Info

Publication number: SU936447A1
Application number: SU802976261A
Authority: SU
Inventors: Олег Николаевич Порохов
Original assignee: Предприятие П/Я Р-6609
Priority date: 1980-08-15
Filing date: 1980-08-15
Publication date: 1982-06-15

Description

Изобретение относится к технике электросвязи и может использоваться в цифровых системах передачи.The invention relates to telecommunication technology and can be used in digital transmission systems.

Известно устройство для формирования биимпульсного сигнала, содержа- ₅щее источник синхросигнала и источник цифрового сигнала, выход которого подключен к первому входу первого элемента И, второй вход которого' соединен с первым выходом формпрова- _t0теля импульсов, а также триггер, выхода которого подключены к входам выходного согласующего блока [1]·A device is known for generating a bi-pulse signal, containing ₅ a clock source and a digital signal source, the output of which is connected to the first input of the first element And, the second input of which is connected to the first output of the pulse generator _t0 , as well as a trigger, the output of which is connected to inputs of the output matching unit [1] ·

Однакр известное устройство имеет низкую точность формирования. 15However, the known device has a low accuracy of formation. fifteen

Цель изобретения - повышение точности формирования.The purpose of the invention is improving the accuracy of formation.

Поставленная цель достигается тем,’ что в устройство для формирования биимпульсного сигнала, содержащее ис- 20 точник синхросигнала и источник цифрового сигнала, выход которого подключен к первому входу первого элемента И, второй вход которого соеди2 нен с первым выходом формирователя импульсов, а также триггер, выходы которого подключены к входам выходного согласующего блока, введены инвертор, второй элемент И и RC-фильтр, выход которого соединен с входом формирователя импульсов, первый выход которого подключен к первому входу второго элемента Й, второй вход которого соединен с выходом инвертора^ вход которого соединен с первым входом первого элемента И, выход которого подключен к первому установочному входу триггера, второй установоч· ный вход которого соединен с выходом второго элемёнта И, причем выход источника синхросигнала подключен к вхо* ду RC-фильтра, а второй выход 'формирователя импульсов соединен со счетным Входом триггера.This goal is achieved by the fact that in a device for generating a bi-pulse signal containing a clock source and a digital signal source, the output of which is connected to the first input of the first element And, the second input of which is connected to the first output of the pulse shaper, as well as a trigger, the outputs of which are connected to the inputs of the output matching unit, an inverter, a second And element, and an RC filter are introduced, the output of which is connected to the input of a pulse shaper, the first output of which is connected to the first input of the second element,, the second input of which is connected to the inverter output ^ whose input is connected to the first input of the first element And, the output of which is connected to the first installation input of the trigger, the second installation input of which is connected to the output of the second element And, and the output of the clock source is connected to the input * to the RC filter, and the second output of the pulse shaper is connected to the counting trigger input.

На чертеже представлена структурная электрическая схема предложенно' го устройства.The drawing shows a structural electrical diagram of the proposed device.

936447 4936447 4

Устройство для формирования биимпульсного сигнала содержит источник 1 цифрового сигнала, первый элемент И 2,инвертор 3, второй элемент И 4, источник 5 синхросигнала, RC- $ фильтр,,6, формирователь 7 импульсов, триггер 8, согласующий блок 9.A device for generating a bi-pulse signal contains a digital signal source 1, a first element And 2, an inverter 3, a second element And 4, a clock source 5, an RC- $ filter ,, 6, a pulse shaper 7, a trigger 8, a matching unit 9.

Устройство работает следующим образом.The device operates as follows.

Цифровой сигнал источника 1 по- 10 ступает на первый вход первого элемента И 2 и через инвертор 3 на первый вход второго элемента И 4. С помощью тактового синхросигнала источника 5, после изменения его скваж-15 ности RC-фильтром 6 относительно порога срабатывания формирователя 7 импульсов, на выходе последнего созда^х· ются две периодические последовательности коротких импульсов. Импульсы 20 первой последовательности проходят на первый установочный вход триггера 8 при совпадении с 1 цифрового сигнала, а на второй; установочный вход триггера при совпадении с. 0 цифрового сигнала.The digital signal of source 1 goes to the first input of the first element And 2 and through the inverter 3 to the first input of the second element And 4. Using the clock signal of source 5, after changing its duty cycle by RC filter 6 relative to the threshold of the driver 7 pulses; at the output of the latter ^, two periodic sequences of short pulses are created. The pulses 20 of the first sequence pass to the first installation input of the trigger 8 when coinciding with 1 digital signal, and to the second; trigger trigger input when matching with. 0 digital signal.

Вторая периодическая последовательность импульсов формирователя импульсов 7 поступает непосредственно на счетный вход триггера. j₀ The second periodic sequence of pulses of the pulse shaper 7 is supplied directly to the counting input of the trigger. j ₀

Для согласования с линией связи служит согласующий блок 9, устраняющий постоянную составляющую прямого и инверсного сигнала триггера и формирующий абсолютный биимпульсный сигнал, в котором последовательность че-³⁵редования импульсов внутри тактовых интервалов однозначно определена 1 и 0 передаваемой цифровой информа^^1И· 40For matching to the communication link is terminating unit 9 that removes a DC component of the direct and inverse trigger signal and generating the absolute biimpulsny signal, wherein the sequence of pulses redovaniya che ³⁵ within clock periods uniquely defined 1 and 0 of information transmitted digital ^ ^1I · 40

Таким образом, при оптимальной фильтрации абсолютного биимпульс·^ кого сигнала устраняется эффект размножения ошибок, характерный для относительного сигнала известного. * Кроме повышения помехоустойчивости за счет устранения размножения оши бок, достижению цели способствует повышенная точность установки равен^· ства длительности разнополярных импульсов биимпульсного сигнала внутри тактового интервала. Это достигается изменением времени RC-фильтра за счет различия времени нарастания и спада сигнала относительно порога врабатывания формирователя импульсов.Thus, with optimal filtering of the absolute bi-pulse signal, the effect of error propagation characteristic of the relative signal of the known one is eliminated. * In addition to increasing noise immunity due to elimination of error propagation, the achievement of the goal is facilitated by the increased accuracy of the installation of equal duration of bi-pulse signals of different polarities within the clock interval. This is achieved by changing the RC filter time due to the difference in the rise and fall times of the signal relative to the threshold of operation of the pulse shaper.

Claims

The invention relates to telecommunications technology and can be used in digital transmission systems. A device for generating a bi-pulse signal is known, which contains a clock source and a digital signal source, the output of which is connected to the first input of the first element, And the second input of which is connected to the first output of the pulse generator, and a trigger, the output of which is connected to the inputs of the output matching unit However, the known device has IMS forging accuracy for fi The chain of the invention is to increase the formation accuracy. The goal is achieved by the fact that a device for generating a bi pulse signal containing a clock source and a digital signal source, the output of which is connected to the first input of the first element I, the second input of which is connected to the first output of the impuls generator, and a trigger whose outputs are connected to to the inputs of the output matching unit, an inverter is introduced, the second element is AND, and an RC filter, the output of which is connected to the input of a pulse, the first output of which is connected to the first input of the second The I input, the second input of which is connected to the output of the inverter / input of which is connected to the first input of the first input I, the output of which is connected to the first installation input of the trigger, the second installation input of which is connected to the output of the second input I, and the output of the clock source is connected to the input of the RC filter, and the second output of the pulse generator is connected to the counting bypass of the trigger. "The drawing shows a structural electrical circuit of the proposed device. 393 A device for generating a bi-pulse signal contains a source of 1 digital signal, a first element AND 2, an inverter 3, a second element AND 4, a source 5 of a clock signal, an RC filter; 6, the driver 7 pulses the trigger 8, the matching unit 9. The device operates as follows. The digital signal of source 1 is fed to the first input of the first element I 2 and through the inverter 3 to the first input of the second element I 4. With the clock of the clock signal of source 5, after changing its duty cycle KS-phsy: rum 6 relative to the response of the imager 7 pulses, at the output of the latter, two periodic sequences of short pulses are created. The pulses of the first sequence pass to the first setup input of trigger 8 when they coincide with 1 digital signal, and the second; trigger setup input when matched with. About digital signal. The second periodic sequence of pulses of the pulse former 7 comes directly to the counting input of the trigger. To match the communication line, the matching unit 9 serves to eliminate the constant component of the direct and inverse trigger signals and form an absolute bi-pulse signal, in which the sequence of pulse alternation within the clock intervals is uniquely defined 1 and O of the transmitted digital information. Thus, with optimal filtering of the absolute biopulse signal, the multiplication effect of oshbok that is characteristic of the relative signal of the known is eliminated. In addition to improving noise immunity by eliminating the multiplication of errors, the goal is achieved by the increased accuracy of setting the equality of the duration of different polarity pulses of a bi-pulse signal within the clock interval. This is achieved by varying the RC filter time due to the difference in the rise and fall times of the signal relative to the threshold of the pulse shaper. DETAILED DESCRIPTION OF THE INVENTION A device for generating a bi-pulse signal containing a source of a sync signal and a digital signal source, the output of which is connected to the first input of the first And element, the second input of which is connected to the output of the pulse driver. a trigger, the outputs of which are connected to the inputs of the output matching unit, characterized in that, for the purpose of shaping accuracy, an inverter is introduced, a second And, and an RC filter, the output of which is connected to the input of the pulse former, the first output of which is connected to the first input of the second element And, the second input of which is connected to the output of the inverter, the input of which is connected to the first input of the first element And, the output of which is connected to the first installation input of the trigger, rubbing the installation input of which is connected n with the output of the second element, And, the clock source is connected to the input of the YaS-4 1Ltra, and the second output of the pulse shaper is connected to the counting input of the trigger. Sources of information taken into account in the examination I I USSR Copyright Certificate № 824460, class, N 04 5/02, 1979 (prototype).