SU769481A1 - Multistable elements-based time-piece with digital indication - Google Patents

Description

one

The invention relates to the field of electronic timekeeping and can be used to indicate the current time in digital form.

Electronic clocks are known on multi-1 stable elements with digital indication, which contain a master oscillator, a constant oscillator, a frequency divider, recalculated decades, logic circuits, timestamp selection blocks 1.

The closest in technical essence to the described invention is a clock on multistable elements with a digital indication, containing a master oscillator, a constant generator, a frequency divider, counting decades, a coincidence circuit, time marker allocation units (minutes, hours, days) and digital indicators, the first output of the master oscillator is connected to the input of the constant generator, and the second is connected to one input of the coincidence circuit, the other input of which is connected to the output of the phase "O constant generator," the output of the coincidence circuit connected to the input of frequency divider 2.

In the known device, in order to preserve the constant luminance of the digits of the indicators, with an increase in the duty cycle of pulses from recalculated decades,

increase the pulse currents through the indicator or voltage, which leads to a decrease in the reliability of the clock.

The aim of the invention is to increase the reliability of clocks by reducing the pulse currents through digital indicators.

To achieve the goal, the watch is equipped with a bistable cell, a driver

10 pulses and circuit, and the output of the frequency divider is connected to the input of the pulse former and one input of a bistable cell, the other input of which is connected to the first output of the driver

16 of the generator and the first input of the circuit Ii, the second input of which is connected to the output of the bistable cell, the output of the circuit I is connected to the synchronization inputs of the counting decades, and the counting input of the first 20th counting decade is connected to the output of the pulse former, and the outputs of the constant generator are connected to the respectively combined sign-forming digital indicator electrodes,

25 common electrodes of which are connected to the outputs of the corresponding conversion decades.

FIG. 1 shows a block diagram of a clock; in fig. 2-time diagrams defining hours of work.

The clock contains master oscillator 1, constant generator 2, coincidence circuit 3, frequency divider 4, pulse shaper 5, forward counting counter 6, phase pulse counting decade 7, circuit 8 AND, bistable cell 9, block 10 allocating minutes, AND block a clock selection, a day allocation block 12, digital indicators 13, a coincidence circuit 14, and a time-varying circuit 15.

The master oscillator 1 pulse is connected to the input of the generator 2 constants. The "O constant" output controls the operation of the coincidence circuit 3, through which every tenth pulse from the second output of the generator 1 is passed to a frequency divider 4, the output of which is connected through a pulse shaper 5 to the input of a forward counting counter 6 containing phase-count recalculated decades 7, which , for example, performed on static triggers. The first output of the generator 1 is also connected to the first input of the circuit 8 I and one input of the bistable cell 9, the other input of which is connected to the output of the 4 frequency divider. The output of the cell 9 is connected to the second input of the circuit 8, the output of which is connected to the synchronization inputs of the counting decades 7. The output of the imaging unit 5 pulses through block 10 is connected to the input of the third decade, to the recording input of the second decade and through block II to the input of the fifth decade, to the recording entry of the fourth decade, as well as through block 12 is connected to the recording inputs of the fifth and sixth decades. Blocks Ш and 11 are connected to the outputs “5 and“ 9, and block 12 - to the outputs “2 and“ 3 of the constant generator 2.

The outputs of all counting decades 7 of counter 6, on which information about current time marks appears, are connected to common electrodes of digital indicators 13, whose sign forming electrodes are respectively combined and connected to the outputs of a constant generator.

For allocation unit 10, minutes of the outputs of the decades 7 are connected to the inputs of the matching circuit 14, the second inputs of which are connected to the outputs of the generator 2. The outputs of the circuits 14 are connected to the inputs of the first circuit 15, the output of which is connected to the first input of the second circuit 15, the second input of which is connected with the output of the imaging unit 5, while the output of the second circuit 15 is connected to the recording input of the second and counting Bxo.iy of the third decade 7 and to the input of the block 11.

Hours on multistable elements with digital indication work as follows.

The pulses from the generator 1 are sent to the input of the generator 2 and through the open sheche 8 to the inputs of the counting decades 7, i.e.

The clock clock is synchronized with clock pulses. The pulses from the output of the divider 4 with a frequency of 1 Hz are fed to the input of the imaging unit 5, producing narrow pulses on the trailing edge of the input. The output pulses from the imaging unit 5 are sent to the counting input of the lower decade of counter 6 and to the second input of the second circuit 15 of block 10. At the same time, the first and second decade 7 follow a series of states that accumulate time information. With the arrival of the 59th pulse in block 10, t coincides in the phases of the output pulses from the first and second

decades 7 with pulses corresponding to phases "9 and" 5 of generator 2. In this case, circuits 15 are prepared for operation. The 60th pulse from the imaging unit 5 passes through circuit 10 to the counting input of the third decade 7, to the recording input of the second counting decade, resetting it to the zero state, and to the input of block 11. The operation of the third and fourth counting decades and diagrams of block 12 is similar. The impulse of the transfer of block II postoiast to the counting input of the fifth decade 7. 23 pulses are counted on the fifth and sixth counting decades. The 24th impulse of the AND block passes through block 12 and resets to fifth and fifth counting decade. The time count after 24 hours is repeated automatically. Now let us analyze the operation of the bistable cell 9 and the circuit 8, as well as the principle of the dynamic indication of decades 7.

From the first output of the master oscillator 1, the pulses arrive at the input of the circuit 8, the duration of which approaches the period of their following (Fig. 2, a).

The falling edge of these pulses establishes in one state the cell 9, the output of which opens the circuit 8. Through the circuit 8, the pulses arrive at the synchronization inputs of the counting decades 7, the output pulses of which will have the duration of the synchronization pulses, the tracking frequency is ten times less, and the phase - depending on the accumulated information (Fig. 2, e). Impulses with

Decades 7 are fed to the common electrodes of the digital indicators 13, and to the correspondingly combined sign-forming electrodes are fed successively one after another constants

from generator 2 (f | ig. 2, g). At the time of arrival, from the decade on the indicator, that number is displayed on the common electrode of the indicator, and the pulse from the generator 2 comes to the sign-forming electrode of which at the same time (Fig. 2, e, the imulse corresponds to the number "9"). And since the pulse frequency from decades is greater than 50 Hz, fast flickering numbers are perceived

the observer as a continuous glow.

At the moment of arrival of a pulse with a frequency of 1 Hz from a divider 4 frequencies to another input of a bistable cell E (Fig. 2.6) and the last on the leading edge of this pulse, it is brought to the "zero state before the arrival of the falling edge of the pulse from generator 1 (Fig. 2 , at). At the same time, the pulse passing through the circuit 8 will be cut back in duration and time from the leading edge of the pulse from divider 4 to the falling edge of the pulse from generator 1 (Fig. 2, d). On the falling edge of the pulse from the divider 4, the driver 5 generates a pulse (Fig. 2, d), which is fed to the counting input of the first decade 7, and it does not coincide in time with the sync pulses.

Thus, with the help of the introduction of new elements: the bistable cell, the AND circuit, and the driver of them, it became possible to increase the duration of the synchronization pulses. As a result, the reliability of the watch as a whole increases. At the same time, the duration of the iaus between synchronization pulses is reduced by three times.

Claims (2)

1. Certificate of author No. 526850, cl. G 04 C 3/00, 06/30/75. 2. Author's certificate N ° 465617, cl. G 04 C 3/00, 10.05.73 (prototype). : -, jO.-ii., Ln; Mr. .. - r- and 4- rJ-l F - r- v j-, Hlh rLiit Part 1. G; LL.r-n ± J i / Z.f