SU544106A1

SU544106A1 - Controlled pulse generator

Info

Publication number: SU544106A1
Application number: SU1791977A
Authority: SU
Inventors: Анатолий Павлович Кондратьев; Рубен Михайлович Асцатуров; Евгений Иванович Пономарев
Original assignee: Предприятие П/Я М-5339
Priority date: 1972-06-05
Filing date: 1972-06-05
Publication date: 1977-01-25

Description

1one

Изобретение относитс к импульсным генераторам и может быть исполь- овано в качестве задающего генератора в блоках синхронизации электронно-вычислительных машин и различных устройств автоматики,5The invention relates to pulse generators and can be used as a master oscillator in synchronization units of electronic computers and various automation devices, 5

Известен управл емый генератор импульсов , содержащий инвертор, охваченный цепыо обратной св зи, в которой имеетс лини задержки , элементы И и схема ИЛИ,A controlled pulse generator is known, which contains an inverter, covered by a feedback circuit, in which there is a delay line, AND elements and an OR circuit,

Однако известный генератор импульсов Ю не обеспечивает возможности генерации импульсов нескольких различных частот.However, the known generator of pulses Yu does not provide the possibility of generating pulses of several different frequencies.

Цель изобретени - обеспечение генерации нескольких различных, заранее заданных частот.15The purpose of the invention is the generation of several different, predetermined frequencies.

Это достигаетс тем, что в генератор введены регистр и дешифратор, выходы которого подключены ко вторым входам элементов И, а входы св заны с выходами регистра.This is achieved by introducing a register and a decoder into the generator, the outputs of which are connected to the second inputs of the AND elements, and the inputs are connected to the outputs of the register.

На фиг. 1 изображена блок-схема пред- 20 лагаемого устройства; на фиг. 2 - временные диаграммы его работы.FIG. 1 shows a block diagram of the proposed device; in fig. 2 - time diagrams of his work.

Управл емый генератор импульсов содержит инвертор 1, охваченный цепью обратной св зи, имеющей линию задержки 2, отводы 25The controlled pulse generator contains an inverter 1 covered by a feedback circuit having a delay line 2, taps 25

которой соединены с входами элементов Иwhich is connected to the inputs of the elements And

3 (3, 3j , 3jj, где п - целое число),3 (3, 3j, 3jj, where n is an integer),

выходы которых через схему ИЛИ 4 св заны с входом инвертора, регистр 5 и дешифратор 6. Выходы дешифратора 6 подключены ко вторым входам элементов И , , а входы св заны с выходами регистра 5.the outputs of which through the OR circuit 4 are connected to the input of the inverter, the register 5 and the decoder 6. The outputs of the decoder 6 are connected to the second inputs of the And elements, and the inputs are connected to the outputs of the register 5.

Временна диаграмма работы управл емого генератора изображена только дл случа генерации синхроимпульсов с периодами следовани Т, к Т. На фиг. 2 прин ты следующие обозначени :The timing diagram of the operation of the controlled oscillator is shown only for the case of generation of clock pulses with the following periods T, to T. In FIG. 2 accept the following notation:

врем задержки первой секции линии задержки 2, the delay time of the first section of the delay line 2,

i - врем задержки второй секции, - врем задержки и -ой секции, tj - момент запуска генератора дл генерации импульсов с периодом Т, i is the delay time of the second section, is the delay time of the and -th section, tj is the time of generator start up for generating pulses with period T,

t.момент запуска генератора дл генерации импульсов с периодом Т , tj - момент времени, к которому должно закончитьс переключение регистра 5 и дешифратора 6,t.start of the generator to generate pulses with a period T, tj - the point in time by which the switching of register 5 and decoder 6 should end,

Claims

At is the total maximum shift time of the register and decoder. To stop the generator, the register 5 is entered into such a code that none of the M BfcixoAOB decoder 6 is excited so all And 3 elements that are used to connect the sections of the delay line 2 to the feedback circuit will be disabled at the output of the device ( inverter output 1) there will be a constant high potential. To generate pulses with a follow-up period, for example, T, in register 5, you need to carry a code in which the first output of the decoder 6 is excited. In this case, the positive voltage drop passing through the first element AND 3, and the OR 4 circuit, is inverted by an inverter 1, and a negative voltage drop appears at its output, which is the trailing edge of the generator impulses, which enters the input of the delay line 2 and at time t appears at its first tap and the input of the first And 3 element. Since the first voltage element IBOSODE And 3 produces a low voltage level, as well as at the outputs of the remaining AND elements, the output of the OR 4 circuit also appears low. and the output of the inverter 1 is a high voltage level and, thus, the leading edge of the output pulses is formed. A positive differential from the output of the inverter 1 is again fed to the input of the delay line 2 and after time t appears at the input of the first element AND 3, again inverted, and so on. Thus, pulses with a period of following T will be generated. If it is necessary to generate pulses with a large follow-up period, for example, Tj, then at time tj the register 5 needs to enter the code so that the second decoder 6 output is excited The first element 3 and 3 is turned off, and the control potential appears at the control input of the second element 3, and therefore the second section of the delay line 2, whose delay time tt is now included in the feedback circuit. As a result, the generator output pulses will be generated from the signals from the second branch of the delay line and their period will be Tj, 2 i.j T, until a new code is entered into register 5. To generate pulses with a maximum period of following T 2, a code must be entered into register 5, at which the first output of the decoder 6 will be excited. In this case, the And 3j element turns on and -a section of the delay line, time the delays of which For the stable operation of the device it is necessary that the entry into the register of the code be performed at the moment of time when all potential lines of the delay line have a low potential. Claims of Invention A controlled pulse generator comprising an inverter covered by a feedback circuit having a delay line, whose outlets are connected to the inputs of the And elements, whose inputs. through the OR circuit is connected to the inverter input, characterized in that, in order to generate different, predetermined frequencies, a register and a decoder are entered into it, the outputs of which are connected to the second inputs of the MeoiTDB And, and the inputs are connected to the outputs of the register.