SU1220115A1 - Device for generating time signals - Google Patents

Abstract

The invention relates to a pulse technique and can be used in devices of frequency and time standards. The purpose of the invention is to increase the reliability of the device. The device contains a pulse former 1, a frequency divider 2, a shifter of a time scale shaper 5, a pulse counter 6, a digital display unit 7, an outer scale pulse shaper 8, a buffer memory unit 10, a time setting unit 11, an external time scale bus 12 . To achieve this goal, an additional frequency divider 3, a switch 4, and a block 9 for adding and subtracting pulses are introduced into the device. 1 il. from to hche

Description

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The invention relates to a pulse technique and can be used in devices of frequency and time standards.

The purpose of the invention is to increase the reliability of the device.

The drawing shows a functional diagram of a device for forming time signals.

The device includes a pulse shaper 1, a main frequency divider 2, an additional frequency divider 3, switch 4, a time scale shifter 5, a pulse counter 6, a digital display unit 7, a shaper 8, an external scale pulse, an addition block 9, and pulse subtraction, buffer storage unit 10, time setting unit 11, external time scale pulse bus 12, the output of the driver 1 is connected via divider 2 to the input of counter 6, the output of switch 4 through the serially connected driver 8 and block 10 through It is connected to the input of block 7, another input of which is connected via counter 6 to the outputs of block 11 and the inputs of block 9, the output of which through divider 3 is connected to the input of the driver 5 connected to the input of switch 4, the information inputs of block 10 are connected to the outputs of bits of divider 2 , the group of outputs of divider 3: is connected to block 9, the third input of which is soy, is dinane with the output of the generator. 1.

The device works as follows.

A 10 MHz sinusoidal signal is fed to the driver 1, and from it in the form of a pulse sequence to the inputs of the main divider 2 at a frequency of 10 MHz - 1 Hz and to the block 9 for adding and subtracting pulses that are controlled by a divider 3 frequencies. The main frequency divider 2 is made for decades. The output signal of the main divider 2 frequency (pulses with a frequency of 1 Hz) is received on. counter 6, also built on the decade principle, the counts of seconds, minutes and hours which have elements for setting the time from the block 11 of setting the time.

Information about the current time in the parallel code from counter 6 to

five

10 15 20 25

40

50 - 55

5Z

steps on the digital display unit 7.

Frequency divider 3 has a construction similar to divider 2, and pulses I Hz to shaper 5. Frequency divider 3, controlled by blocks 9 and 11, allows you to shift the auxiliary time scale relative to the main one (within O - 1 s with a step of 0.1 mks). The pulse sequence of the auxiliary time scale is used when comparing and synchronizing the clocks with each other, for example, by starting the synchronization of the oscilloscope.

The state of all decade divider 2 frequencies (10 MHz - 1 Hz) varies sequentially from 000.0000 to 999.9999, and the times 000.0000 correspond to the moments of the impulses of the time scale.

In one position of the switch 4, which can be executed on a conventional toggle switch, the pulses from the output of the imaging unit 5 of the time scale being shifted through the imaging unit 8 are fed to the input of the block 10 of the buffer memory. At the moment of arrival of the pulse on the block 10 of the buffer memory, the state of the decade divider 2 frequencies is fixed. In this case, a decimal number N is written to the buffer memory unit 10, which indicates how many pulses of the input frequency were received at divider 2 since the last pulse of the main time scale was issued. Information from the buffer storage unit 10 is supplied to the digital display unit 7. Thus, the function of measuring the indication of the time shift of the auxiliary time scale relative to the main one is realized.

The proposed device also allows measuring the shift between the main and external time scales. For this, KOf-iMyTaTop 4 is set to the second position, where the external time scale pulses are applied to the input of the buffer memory unit 10 through the driver 8, while no blocks are used 9 and 3.

Claims (1)

Invention Formula A device for generating time signals containing a pulse shaper, the output of which is connected to the input of a frequency divider, output de3 A frequency switch is connected to the input of a pulse counter, the bit inputs of which are connected to the outputs of the time setting unit, a digital display unit, the first input of which is connected to the outputs of the pulse counter, and the second input is connected to the output of the buffer memory block, the time scale shifter, the pulse shaper external scale, that is, because, in order to increase reliability, an additional frequency divider, a pulse addition and subtraction unit, a switch with one input connected to the bus and pulses external time scale, another input coupled to the output of the displaceable time scale, and the output connected to the input of the external-scale pulse former, the output of which is connected to the input of the buffer memory unit, whose information inputs J are connected to the outputs of the bits of the main frequency divider, the output of the additional frequency divider is connected to the input of the shifter of the time scale shifted Frequency connected to the first group of inputs of the block of addition and subtraction of pulses, the second group of inputs of which is connected to the outputs of the block 15 sets the time, and the input is connected to the output of the pulse former, and the group of outputs of the addition and subtraction unit and myles are connected to the group of inputs of the additional frequency converter.