SU547971A2

SU547971A2 - Frequency divider

Info

Publication number: SU547971A2
Application number: SU2042377A
Authority: SU
Inventors: Евгений Дмитриевич Мамонтов
Original assignee: Предприятие П/Я М-5619
Priority date: 1974-07-04
Filing date: 1974-07-04
Publication date: 1977-02-25

Description

1one

Изобретение отнсюитс к импульсной технике и может быть использована в случа х , когда необходи-мо последова-тельЕше получение сигналов с частотами, кратными некоторой тактовой частоты.The invention relates to a pulse technique and can be used in cases where the sequence of receiving signals with frequencies that are multiples of a certain clock frequency is necessary.

Известен делитель частоты по авт.св. № 484646.Known frequency divider auth.St. No. 484646.

Однако в известном делителе частоты не обеспечиваетс получение большого числа сигналов с различными частотами, от- личных от 2 .However, in a known frequency divider it is not possible to obtain a large number of signals with different frequencies, different from 2.

Целью изобретени вл етс расширение функциональных возможнос-тей делител частоты .The aim of the invention is to expand the functionality of the frequency divider.

С этой целью в него введены формирователь импульсов и дополнительное делительное устройство, вход которого соединен с выходом автоколебательного генератора, а выход через формирователь импульсов - с выходами сброса дополнительных триггеров. For this purpose, a pulse shaper and an additional dividing device are introduced into it, the input of which is connected to the output of the self-oscillating generator, and the output through the pulse shaper is connected to the reset outputs of additional triggers.

На чертеже представлена функциональна схема делител частоты.The drawing shows a functional frequency divider circuit.

Делитель частоты содержит задающий генератор 1 сигналов тактовой частоте Г, триггеры 2 и 3, цепь обратной св зи 4.The frequency divider contains a master oscillator 1 of signals to a clock frequency G, triggers 2 and 3, and a feedback circuit 4.

логические элементы И 5 - 8 и ИЛИ 9 - 10, автоколебательный генератор 11счастотой импульсов f|2/K g , дополнительные триггеры 12 и 13, дополнительное кэлебательное устройство 14 и формирова тель импульсов 15.AND 5 - 8 and OR 9 - 10 logic elements, a self-oscillating generator 11 with a frequency of pulses f | 2 / K g, additional triggers 12 and 13, an additional calibrator device 14 and a pulse shaper 15.

Работает делитель частоты следующим образом.The frequency divider works as follows.

В процессе работы сигналы тактовой частоты , вырабат1.1ваемые задаюш.им генератором 1, дел тс по частоте триггерами 2 и 3, обхваченными цепью обратной св зи 4.In the course of operation, the clock frequency signals generated by the 1-1 generator 1 are divided in frequency by the triggers 2 and 3 enclosed by the feedback circuit 4.

Коэффициент делени частоты определ етс числом последовательно включенных триггеров и тем, с какого из выходов каждого триггера снимаетс сигнал, поступающий на вход следующего за ним триггера, и The frequency division factor is determined by the number of successively activated flip-flops and by which of the outputs of each flip-flop a signal is received at the input of the flip-flop following it, and

И может измен тьс в пределах от 2 до 2 где п - число последовательно включенных триггеров 2 и 3.And it can vary from 2 to 2, where n is the number of series-connected triggers 2 and 3.

Claims

Self-oscillating generator of 11 s.zde signals with a fixed frequency - - / | , where fQ is the clock frequency, and K is the maximum division factor of the clock frequency. Additional triggers 12 and 13, operating in the frequency division mode, provide continuous reception of signals with frequencies f / 2 supplied through logic gates AND 5-8 and OR 9, 1О, and provide alternate reception of all switching options and, therefore, division factors from 2 up to 2 until the time B {5meni, when the reset pulses generated in pulse generator 15, return additional triggers 12 and 13 to the initial state. The additional dividing device 14, to the input of which signals are fed from the output of the self-oscillating generator 11, has a division factor equal to the number of periodically repeating frequencies required at the output of the flip-flops 2 and 3. The signals from the output of the additional dividing device 14 are fed to the pulse shaper 15, where, after differentiation, short-duration reset pulses are generated. Formula of the invention No. 484646, characterized in that in order to expand the functionality of the frequency divider, a pulse driver and an additional division device are introduced into it, the input of which is connected to the output of the self-oscillating generator, and the output through the pulse driver for additional triggers.