SU598260A1 - Method and apparatus for automatic tuning of timing pulse phase - Google Patents

Description

frequency, the output of the latter is connected to the input of the phase discriminator 3, the output of the pulse shaping unit connected to the input 6, the output of the cell 2 is connected to the other: the input of the S block, and the output of block 6 is connected to the second input of the splitter 4 frequency Block 5 eliminates the pulse T and logical elements AND 8-1O. Divider 4 frequency contains triggers 11 and 1.2 and logical elements And 13 and 14.

A device for implementing the method of discrete auto-tuning of the clock pulse phase operates as follows.

In advance mode, pulses of the master oscillator 1 with a period T are received at the input of the pulse elimination unit 5 (Fig. 2a). The significant moment of the input signal selected as a narrow pulse coincides tempo with {n interval between the two pulses of the master) generator 1, arrives at the other input of the pulse elimination unit 5 (Fig. 2). The pulses generated by the trigger 7 of the pulse elimination unit 5 are shown in FIG. 2, g. The pulse from the output of the trigger 7 is applied to the logical element AND 8, inverted and fed to the logical element AND 9 (Fig, 2, d), which leads to the prohibition of the passage of one of the pulses from the renepjaTopa 1 to the frequency divider 4 and the phase shift of the clock pulses the side of settling on (fig. f, g). The trigger 11 of the splitter 4 frequency generates pulses (Fig. 3), which, after passing through the logic elements 13 and 14, arrive at the input of the trigger 12 (Fig. 1k). At the output of the trigger 12 in the phase-adjusted mode of operation, the impulses представf shown in FIG. 2l are formed, and when operating without. phase adjustments are the pulses shown in FIG. 2 m

In the lag mode, the device eliminates one pulse at the input of the divider 4 frequencies. This happens in the same way as in the advance mode (Fig. 3, a-f). The lag mode is determined by the arrival of the impulse from the code of the phase discriminator

3 at the input of the pulse shaping unit 6 (FIG. 3, c). When a pulse appears from the output of the phase discriminator 3, a pulse is formed at the output of the pulse shaping unit 6, which coincides in time with the pulse that is eliminated at the input of the divider

4 frequencies (fwg. 3, and). The impulse generated by the impulse shaping unit 6 is fed to the input of the element AND 14 of the divider 4, and allows the passage of pulses from the output of the trigger 11 of the frequency divider to the input of the trigger 12 (Fig. 3, km). The combination of eliminating i pulse at the divider input

the frequency and the supply of the pulse coinciding with the one excluded at the input of the trigger 12, leads to a phase shift of the clock pulses in the direction of advance by T, (Fig. 3, n, o). Compared to the known method, the proposed method doubles the accuracy of adjusting the phase of the clock pulses without increasing the frequency of the master oscillator, and consequently makes fuller use of the operating frequency range of the applied chips.

Claims (2)

Invention Formula Discrete phase clock auto-tuning, which consists of 4mrmming by dividing the pulse sequence with a frequency clock and determining the deviation of the last significant moments of the input pulse sequence from the phase of the significant moments of the input pulse sequence to exclude the pulse from pulse sequence specifies the frequency, characterized in that, in order to achieve the accuracy of the auto-tuning of the phase of pulses without incrementing the frequency, when the clock pulses phase away from the phase of the significant moments of the input pulse sequence, they simultaneously exclude the pulse from the pulse sequence by frequency 1.g and form the pulse, the phase, the amplitude and duration of which coincide with the excluded pulse. 2. An apparatus for carrying out the method according to claim 1, comprising a zakashy generator, a block for extracting significant moments of the input signal, a phase discriminator, a frequency divider, a pulse elimination unit, the first input of which is connected to the output of the master oscillator, and the output of the pulse excluding unit the frequency, the output of which is connected to the input of the phase discriminator, the output of the latter is connected to the input of the pulse shaping unit, different from the fact that the output of the selection block & no significant moments of the input signal By connecting the other input of the pulse eliminating unit, and the output pulse generating unit is connected to the second input of the frequency divider. Sources of information taken into account in the examination: 1. V.I. Shl Pobersky, Elements of Discrete Communication Systems M.,. Military Publishing, 1965, p. 210-214. Su K / I n a njn-ri "njnjnjnjnjTjnjn, jnj-lJ