SU1298705A2 - Device for generating time intervals - Google Patents

Abstract

The invention relates to a pulse technique and is additionally Hbw to as. If 883858. The purpose of the invention is to expand the functionality of the device. The device contains 1 reference frequency generator, 2 frequency divider, multiplexer 3, scale register 4, 5 time interval counter, data register 6 and elements OR 7 and 8, 11 pulses counter, element 14 and trigger 13 are entered into the device. This allows generate a set number of time intervals of single pulses of a specified duration, provides synchronization with an external device and allows you to make a common output bus of all three modes of operation of the proposed device. 1 il. (L 14)

Description

The invention relates to a pulse technique and is a ycoBepnieHCTBoin of a known device according to bus No. 883858.

The purpose of the invention is to expand the functionality of the device by forming a set number of time intervals, forming single pulses of specified duration and providing synchronization with external devices.

The drawing shows a block diagram of a device for forming time intervals.

The device contains a generator 1 reference frequency, divider 2 frequencies, multiplexer 3, scale register 4, 5 time intervals counter data register 6, elements OR 7 and 8, start buses 9 and 10, counter 11 synchronization bus 12 of an external frequency signal, trigger 13, the element OR 14, the output gas 15, moreover, the output of the generator 1 is connected via divider 2 to the information inputs of multiplexer 3, whose address inputs are connected to the bit outputs of register 4 of mas.1.1b, the output of multiplexer 3 is connected to the first input of counter 5, at register 6 moves are connected to the bit inputs of the register 4 and the start bus 10, the start bus 9 is connected to the start inputs of registers 4 and 6 and the first input of the OR element 7, the output of which is connected to the second input of the counter 5, the output of the last is connected to the second input of the first element OR 7 and with the first input of the second element OR 8, the second input of which is connected to the third input of the first element OR 7 and with the output of the register 4, the output of the second element OR 8 is connected to the input of the generator, and the discharge outputs of the register 6 are connected to the discharge inputs counter 5, the output of the trigger 13 is connected to the first input of the third element OR 14, the reset input of the trigger 13 is connected to the output of the counter 5, the second input of the third element OR 14 and the input of the counter 11 whose bit inputs are connected to the outputs of the register 4, the second output of which is connected to information input trigger 13, gating input. which is connected to the first entrance

counter 5 and the output of the counter 11, the information input of the multiplexer 3 is connected to the synchronization bus 12 of the external frequency signal.

The device works as follows.

In the initial state, the signal from the output of the counter 5 time intervals through the element OR 8 is fed to the input of the generator 1 of the reference frequency, prohibiting its operation.

When a signal appears on bus 9, data on the operation mode of the device are recorded in register 4 of the scale, data on the duration of the time interval and a single pulse are recorded through register 6 of the data in the counter. 5 time intervals, data on the number of time intervals to be generated into counter 11. In this state, the output of the 5 time intervals counter is changed in such a way that the prohibition signal from the input of the generator 1 of the reference frequency is removed.

The reference frequency generator 1 begins to generate pulses of frequency fg, which are fed to the input of divider 2 frequency, the outputs of which generate frequency signals associated with the reference frequency by the following relations:

Thats

 J.2.

s - F - f 1 RP-, 0

Frequency signals 7, 7 ..., 7, as well as an external frequency signal F, coming through bus 12, if it is, arrive at the information inputs of the multiplexer 3, the output of which passes the frequency signal defined by the code received from the information register outputs 4 scale.

The duration of the formed time interval and a single pulse of a specified duration is determined by the formula

t t „mIo

where M is the contents of the data register; p - the contents of the scale register;

0 5

55

TO

Maximum time interval and single pulse

set duration T

(CS JSC

Which can be formed at a given reference frequency f, is determined by the formula

t t

max about

ten

where m is the data register size; n is the scale register size.

In the mode of forming a single time interval, the signal at the first output of the register 4 of the scale blocks the operation of the element OR 7. At the end of the time interval, a signal is generated at the output of the counter 5 time intervals, which through the element OR 8 is fed to the input of the reference frequency generator 1,

In the mode of forming a sequence of time intervals, the signal at the output of the register 4 of the scale blocks the operation of the element OR 8. At the end of the time interval, the output of the counter of 5 time intervals generates a signal that through the element OR 7 is fed to the installation input of the counter 5 time intervals pressing the data register 6, the formation of the predetermined time interval begins again. At the same time, the signal from the output of the counter 5 time intervals is fed to the input of the counter 11. The device generates a sequence of time intervals until the state on the first output of the scale register 4 changes or if the specified number has reached time intervals in counter 11, the signal from its output blocks the arrival of clock pulses at the input of the counter 5 time intervals.

In the mode of forming a single pulse of a specified duration, the signal from the second output of the register 4 of the scale passes to the information input of the trigger 13, allowing the counter of the 5 time signal to emit the formation of the forward formation and decrease by

W my counter 5 times fishing. When the duration in the counting intervals is reached, a 43 occurs in another state.

15, a rear FR signal formed by a chica 5 time inter-element OR 8 is formed.

20 em his work.

The introduction of the element should be made common to all three modes of the working device.

25

thirty

35

40

45

Claims (1)

Formula iso A device for shaped intervals for the purpose of expanding functions, input impulses into it, a third elec tor whose output with a third input e of a trigger reset input by a time counter with a second input third and a counter input impulse inputs of which through a series of outputs register a second the output of which by the information input is the biating input of which by the first input the interval counter and the output of the pulses, the information typelexer is connected to the outer bus bar 50 Editor N. Bobkova Nala Compiled by V. Chizhov Tehred I. Popovich Corrector M. Demchik Order 887/49 Circulation 371Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow,, Raushsk nab., 4/5 Production Polygraph Enterprise, Uzhgorod, ul. Project, 4 987054 Mym forming impulse. The signal at the first output of register 4 of the masEchtab must block the operation of the element 6-6. When the first tak5 pulse arrives at the count input counter 5 time intervals, the trigger 13 is set, i.e. formation of the leading edge of the pulse, and reducing by one the content of the counter of 5 time intervals. When the specified duration code reaches the counter of 5 time intervals, the flip-flop 43 is transferred to another state, i.e. 15, the leading edge of the pulse is formed, and the signal formed at the output of the counter 5 time intervals, through the element OR 8, is fed to the input of the generator 1 of the reference frequency and prohibits its operation. The introduction of the element OR 14 allows us to make a common, output bus for all three modes of operation of the proposed device. 25 0 five 0 five Invention Formula A device for forming time intervals according to bus No. 882358, characterized in that, in order to expand its functionality, a counter is inserted in it. pulses, a third OR element and a trigger, the output of which is connected to the first input of the third element OR the reset input of the trigger is connected to the output of a time interval counter, the second input of the third OR element, and the input of a pulse counter, which inputs are connected to the bit outputs of the scale register, the second output which is connected to the information input of the trigger, the building input of which is connected to the first input of the time interval counter and the output of the pulse counter, the information input of the multiplexer nen synchronization with the external bus frequency sig