SU1511733A1 - Digital slave clock - Google Patents

Abstract

The invention relates to instrumentation, in particular to secondary time devices, to which current time information is received from the primary clock in a coded form. The invention can be used in the construction of the clock systems of various buildings and institutions, as well as in everyday life. The purpose of the invention is to expand the functionality by installing and displaying a clear time. This is achieved by introducing an RS-Trigger, a two-input coincidence circuit, decade and binary pulse counters with inputs of parallel recording and with a total scaling factor of "24", two memory decoders, two AND-input circuits, and a shift unit of hourly information consisting of a switch, an encoder and a persistent storage device. 2 Il.

Description

The invention relates to instrumentation, in particular, to secondary time devices, to which current time information comes from the primary clock in the coded IDE and can be used to digitally indicate both local and late times.

The purpose of the invention is to expand the functionality by installing and displaying a clear time.

FIG. 1 shows a block diagram of a digital secondary clock local and local time; Fig. 2. -, timing diagrams explaining their work.

The digital secondary clock of local and local time (Fig. 1) contains a pulse selector 1, decade counter 2, decoder 3, switch 4, digital indicators 5 and 6 of displaying the values of the units of minutes and tens of minutes of the current time, respectively, RS flip-flop 7, two-input coincidence element 8, two-input elements AND 9, 10, decade counter 1 with inputs of parallel code writing, two-input element OR 12, binary counter 13 with inputs of parallel code writing, decoders 14 and 15 with memory, digital display indicators 16 and 17, respectively one egg hours and tens of hours, the unit 18 clockwise shift information.

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Sdd OO

3-151

The clock information shift unit 18 consists of a switch 19,) of the controller 20 and a permanent storage device (ROM) 21.

The selector 1 of pulses contains a detector of clock (positive) pulses, a detector of information (from "- negative) pulses with inversion.

shaper envelope of a packet of clock recording of the counter code 11 and 13 at 1733

the records of which are combined and connected to the marker output of the pulse selector 1, the outputs of the decoders 14 and 15 are connected to the sign-forming electrodes according to digital indicators 16 and 17, the common electrodes of which are connected to a power source, informational inputs parallel

pulses and two-input element,

In digital secondary clocks, at the same time, the input of the pulse selector 1 is connected to a two-wire communication line of the primary clock, and its output of 5-watt pulses is connected to the counting input of a ten-day counter 2, the input of the zero setting of which is connected to the information input of the selector 1, the information outputs of a ten-day the counter 20 is connected to the inputs of the decoder 3, the control input of which is connected to the counting input of the switch 4 and connected to the output of the envelope of the packet

clock pulses of the selector 1, output 25 clock and information pulses

the marker pulses of which are connected to the installation input of the zero of the switch 4, the first and second outputs of which are connected respectively to the common electrodes of the digital indicators 5 and 6, sign-30 whose output is co-connected with the first input 35

The co-forming electrodes of which are respectively combined and connected to the outputs of the decoder 3. The output of the envelope of the packet of clock pulses and the output of information pulses of the selector 1 are connected respectively to the inputs R and S of the RS flip-flop 7, the output of which is connected to one input of coincidence element 8, the other input connected to output clock: pulses 40 of the selector 1, and the output of element 8 is connected to the combined first inputs of elements AND 9, 10, the second inputs of which are respectively connected to the second and third outputs of the switch ora 4, the output of the element 9 is connected to the counting input of the decade counter 11, the output of the transfer pulses through the element OR 12 is connected to the counting input of the binary counter 13, the output of the counter 13 is connected to the write enable input of the counter 11, the output of the element; And 10 is connected to the other input of the element OR 12, the second output of the switch 4 is connected to the gate; to the parallel write inputs of the counters II and 13, the information outputs of which are connected respectively to the inputs of the decoder 14 and 15, the inputs for: 50

connected to the information outputs of the block 18 shift hour information.

In the clock information shift unit 18, the movable contact of the switch 19 is connected to one of the inputs of the encoder 20, the code outputs of which are connected to the address buses of the ROM 21, the information outputs of which are respectively connected to the inputs of the parallel writing of the counter code 11 and 13.

In the pulse selector 1, a two-wire COMMUNICATION line is connected to the detector inputs and, accordingly,

(, positive and negative pulses), the output of the detector of clock pulses is connected to the input of the driver of the envelope of a stack of clock pulses,

35

40 ; ; 50

the element home, the second input of which is connected to the inverted output of the information pulse detector, the output of the clock pulse detector is connected to the counting input of the decade counter 2, the output of the detector of information pulses is connected to the input of the zero setting of the counter 2, the driver output is connected to the counting input of the switch 4, the input installation zero of which is connected to the output element I.

Digital secondary clocks of local and local time work as follows.

The bipolar pulse sequences of the current time code (Fig. 2a), for example, the values of the minutes and hours, are received at the input of the selector 1 of pulses via a two-wire communication line (for example, values of minutes and hours), each value of decimal digit being encoded in one-ten code, i.e. negative polarity pulse, which follows between the ten clock pulses of positive polarity. Packs of clock pulses follow with a duty ratio of two, and before each first pack, after the fourth, there follows a negative pulse.

steps with a frequency of not less than 40-50 Hz, the fast flickering numbers on the indicator pax 5 and 6 due to the inertia of the human eye are perceived by the observer as a continuous luminescence.

Consider the work of hours when indicating local time, i.e. values of the code obtained from the communication line, while the switch 19 is in the position O.

In contrast to the indication of the values of the minutes, which takes place in a dynamic way, the indication of the values of the polarity, as shown in FIG. 2a The transmission of the time code begins with units of minutes, followed by tens of minutes, then units of hours, and then tens of hours. FIG. 2a shows the values of the transmitted time scale 16 h 54 min.

Thus, the pulse selector 1 from the incoming bipolar pulse sequences allocates clock bursts, ten pulses in each batch (Fig. 2b), makes information pulses (Fig. 2c) 5 forms the envelope of clock pulses. carried out by static pulses (Fig. 2d) and removed from the information, i.e. the ignition of each digital pulse (Fig. 2c) of the marker indicator 16 and 17 controls the residual pulses (Fig. 2e), meaning the target decoder 14 and 15. The transmission of the time code. With the corresponding RS-trigger 7 and the elemental outputs of the selector I, clock 20 and 8 coincidences, pre- and information pulses are received, generated by a single-decimal, respectively, at the counting input and the input of the zero-setting of the ten-day counter 2. Under the influence of clock pulses, the ten-decade counter 2 moves from one 25 2g) from the output of the envelope of the clock-state packet to another, with the arrival of the information pulses of the selector 1 and the arrival of the charging pulse, it is set to the zero state, and then it counts clock pulses that come after the information, JQ and which carries information about the significance of digits of the transmitted time code. Under the influence of the trailing edge of the pulses from the output of the envelope of the packet of clock pulses of the selector 1 (Fig. 2d), the switch 4 changes from one state to another, and at its outputs a sequence into a pulse number. In this case, the RS-trigger 7 is in the zero state in the pauses between the pulses (Fig.

35

on the R input. The RS-flip-flop 7 passes to the single state under the influence of information pulses from the selector 1 on its S-input (Fig. 2c). Thus, the coincidence element 8 is opened by signals from the RS flip-flop 7 (Fig. 2e) and passes through itself the number of clock pulses from the selector 1 proportional to the time code value (Fig. 2g). Further, these pulses from the output of element 8 coincidence arrive at the combined first inputs of elements AND 9 and 10. Through element AND 9, the signal from the second output of switch 4 (FIG. 2H-II) to the counting input of the counter 11 receives the number of pulses of sign . units of hours of time (Fig. 2i). But since the local time indication occurs, i.e. the switch 19 is in the average (zero) position, in which the ROM 21 to the inputs of the parallel code of the meters 11 and 13

One after another, pulses appear, as shown in Figs. 2c. Under the influence of the marker pulse (Fig. 2d) from the selector 1 arriving at the input of the zero setting, the switch 4 is confirmed in the zero state, thereby synchronizing its operation with respect to the analogous primary clock node.

The pulses from the first and second outputs of the switch 4 (Fig. 2h) alternately arrive at the common electrodes of the digital indicators 5 and 6, and at times

40

45

on the R input. The RS-flip-flop 7 passes to the single state under the influence of information pulses from the selector 1 on its S-input (Fig. 2c). Thus, the coincidence element 8 is opened by signals from the RS flip-flop 7 (Fig. 2e) and passes through itself the number of clock pulses from the selector 1 proportional to the time code value (Fig. 2g). Further, these pulses from the output of element 8 coincidence arrive at the combined first inputs of elements AND 9 and 10. Through element AND 9, the signal from the second output of switch 4 (FIG. 2H-II) to the counting input of the counter 11 receives the number of pulses of sign . units of hours of time (Fig. 2i). But since the local time indication occurs, i.e. the switch 19 is in the average (zero) position, in which the ROM 21 to the inputs of the parallel code of the meters 11 and 13

CQ produces only zeros, which are recorded between batches of clock pulses in them by the leading edge of signals (Fig. 2d). The information from the counting signal from the second output of the switch 4 decades 2 through the decoder 3 is fed (Fig. 2h-11), then the counters 11 and 13 for the sign forming electrodes of the digital indicators 5 and 6. As a result, the indicators 5 and 6 alternately highlight 55

information is recorded corresponding to the values of units and tens of hours transmitted to the secondary clock. From counters 11 and 13, this is decoded into decoders 14 and 15 with memory. information with the help of information on the values of units and tens of minutes, respectively. And so jjaK information comes to the secondary clock with a frequency of not less than 40-50 Hz, the fast flickering of figures on the indicator pax 5 and 6 is accepted by the observer as continuous glow

Consider the work of hours when indicating local time, i.e. values of the code obtained from the communication line, while the switch 19 is in the position O.

In contrast to the indication of the values of minutes, which occurs in a dynamic way, the indication of the values of the hours is carried out in a static way, i.e. the ignition of each digital indicator 16 and 17 controls the individual decoder 14 and 15. Using the RS flip-flop 7 and the coincidence element 8, the unit-decimal code is transformed from the output of the envelope of the clock output pulses of the selector 1 and the arrival -

owls are carried out in a static way, i.e. the ignition of each digital indicator 16 and 17 controls the individual decoder 14 and 15. Using the RS flip-flop 7 and the coincidence element 8, the unit-decimal code is transformed from the output of the envelope of the clock output pulses of the selector 1 and the arrival -

yes to pulse number. In this case, the RS-trigger 7 is in the zero state in the pauses between the pulses (Fig.

owls are carried out in a static way, i.e. the ignition of each digital indicator 16 and 17 controls the individual decoder 14 and 15. Using the RS flip-flop 7 and the coincidence element 8, the unit-decimal code is transformed from the output of the envelope of the clock output pulses of the selector 1 and the arrival -

on the R input. The RS-flip-flop 7 passes to the single state under the influence of information pulses from the selector 1 on its S-input (Fig. 2c). Thus, the coincidence element 8 is opened by signals from the RS flip-flop 7 (Fig. 2e) and passes through itself the number of clock pulses from the selector 1 proportional to the time code value (Fig. 2g). Further, these pulses from the output of element 8 coincidence arrive at the combined first inputs of elements AND 9 and 10. Through element AND 9, the signal from the second output of switch 4 (FIG. 2H-II) to the counting input of the counter 11 receives the number of pulses of sign . units of hours of time (Fig. 2i). But since the local time indication occurs, i.e. the switch 19 is in the average (zero) position, in which the ROM 21 to the inputs of the parallel code of the meters 11 and 13

produces only zeros, which are written in them by the leading edge of the signal from the second output of switch 4 (Fig. 2h-11), then to counters 11 and 13

information is recorded corresponding to the values of units and tens of hours transmitted to the secondary clock. From counters 11 and 13, this is decoded into decoders 14 and 15 with memory. information using marker 7-1

The second pulse (Fig. 2d), i.e. when counting the number of pulses of units and tens of hours is completed. Further this information is indicated by indicators 16 and 17.

Before describing the work of the clock with an indication of a different time, which differs from the local time by an integer number of hours, let us make some explanations.

For an indication of a clear time, which is ahead of the local time by an integer number of hours, the values of digits from 1 to 23 are written in ROM 21 in a binary-decimal code.

Indication days for the rest of the time lagging behind the local one, in the ROM 21, I write the value of the digits from 1 to 23 in the binary-decimal code, but recalculated according to the formula

Т Т - Т сч where Тдоп - additional code numbers;

  the conversion rate of non-reversible counters II and 13 is 24;

T is the value of the difference between local and lagging time.

Consider the work of the clock when the display is at the same time, ahead of local time (by an integer number of hours). In this case, the switch 19 is, for example, in the +3 position, as a result of which the encoder 20 on the address buses of the ROM 21 provides the address from which the outputs of the ROM 21 enters the inputs of the parallel recording of the counter 11 to the binary-decimal code 0-0-1- 1 (which corresponds to three), and to the inputs of the counter 13 - the code .0-0. These codes are recorded in the counters for the front frot of pulses from the second output of switch 4 (FIG. 2h-11) 5. before entering the counters 11 and 13 of the local time code values in the number-pulse code (value 16 hours. Counters 1 and 13 add the number 3 previously written to the number 16, as a result of which the number 19 is recorded. Marker pulse ( Fig. 2d) rewrites the contents of counters 11 and 13 into the memory of decoders 14 and 5, arriving at the recording input from the output of the marker pulses of the selector 1. Thus, on all digital indicators 17, 16, 6 and 5, 19 hours are highlighted.

eight

54 min. corresponding in sleep time, ahead of 3 hours local. Consider the work of hours with indi-.

for the time lagging behind the local time (by an integer number of hours). In this case, the switch 19. is located, for example, in the position of -3, as a result of which the encoder 20 sends the address 21 to the address memory of the ROM 21, which from its outputs enters the inputs of the parallel recording of the counters 11 and 13 in the binary-ten code the value of the digit 21 The value of the digit 21 through 5 is derived as follows based on the formula

T T, - T 24-3 21. In the binary-decimal code, the number 21 will look like 1-0. and 0-00 -0-1. These codes are written to the counters on the leading edge of the pulses from the second output of the switch 4 (Figs. 3-11). Then the element And 9 skips to the counting input of the counter. eleven

5 a pack of six pulses (Fig. 2i) of units of hours local time. With the arrival of the third pulse on the input of the counter 11, both counters (11 and 13) are set to the null left state, because they add the numbers 21. to 3, which gives a total of 24, and as a result, the feedback and both And and 13 counters are zeroed. After that, the counter 11 receives three more pulses, and then the counter 13 then an element 10 through the element 10 and the element OR 12 (figure 2k), resulting in the number 13 in the counters. At the moment of the arrival of the marker pulse the output of the selector 1 to the inputs of the recording p. encoders 14 and 15 (Fig. 2d) they write codes about the value of digits 13. Thus, on all numeral indicators 17, 16, 6 and 5, 1-3 hours 54 minutes are displayed, corresponding to the rest of time by 3 hours from local (16 h 54 min).

By taking the work of the selector 1 pulses (Fig, C). A two-wire communication line from the primary clock to the input of the selector 1 receives a sequence of pulses (Fig. 2a), from which the detector separates clock pulses of positive polarity (Fig. 26), and the detector pulses negative polarity, which are then inverted (Fig. 2c), From the bursts of clock pulses (Fig. 26) formi5

0

five

15

The transmitter forms their envelope (Fig. 2d), with which the marker pulses (Fig. 2e), indicating the beginning of the transmission of the time code, are extracted from the information sequence (Fig. 2c).

Claims (1)

Invention Formula Digital secondary clocks containing a pulse selector with four outputs, a switch, a counting decade, a decoder and digital indicators, the selector input is connected to the two-wire primary clock communication line, the selector clock output is connected to the counting input of the decade counter, the input of which zero is connected with the information output of the selector, the information outputs of the decade counter are connected to the inputs of the decoder, the output of the envelope of the burst of pulse pulses of the pulse selector is connected to the counting in The switch ohm, the input of which zero is connected to the output of the pulse pulses of the pulse selector, the first and second outputs of the switch are connected to O.S.6 electrodes of digital indicators, the sign forming electrodes of which are connected to the outputs of the decoder, characterized in that due to the installation and indication of a clear time., they include an RS trigger and two input matching elements, decade and binary counters, r inputs of parallel recording and with a common recalculation factor eta, equal to 24, two decoders with. memory, two two-input AND elements, the OR element of the clock information shift, the output of clock pulses, the output of information pulses, and the envelope output of the packet of clock pulses of the receiving selector are connected respectively to 310 the first input of the match element, input S and input R of the RS flip-flop, the output of the RS flip-flop is connected to the second input of the match element, whose input is connected to the first 1 combined inputs of the And elements, the output of the first And element is connected to the counting input of the ten-day pulse counter, the output of transfer pulses through the OR element is connected to the counting input of a binary counter, the input of the record of the decade counter code is connected to the output of the binary counter, another input., element OR is connected to the output of the second element AND, the second input of which is connected to the last output of the switch, the penultimate output of which is connected to the second input of the first element AND, information outputs of the hour information shift block are connected respectively to the inputs installations of the parallel code of the decade and binary counters, the gates of the parallel recording of which are combined and connected to the penultimate output of the switch, output-. Parallel decimal and binary counter dyes are connected to memory decoders, the recording inputs of which are combined and connected to the output of selector marker pulses, memory decoder outputs are connected to sign-forming electrodes of digital indicators, hours, and the clock information shift unit contains a switch, encoder and read-only memory; the movable contact of the switch is connected to The bus line is connected to the inputs of the encoder, the outputs of which are connected to the address buses of the permanent storage device, the information outputs of which are the information outputs of the clock information shift unit, and one fixed switch contact is not electrically connected to the encoder.