DE2020169C3 - Procedure for the synchronization of PCM line regenerators - Google Patents

Description

producer (i L) isi, uci au »auw» «..“.

incoming pulses the phase mean value and. gates can be controlled.

The regenerator cycle 30 is formed from this phase mean value

(m) forms with which all clock modulators (Ml, therefore a node without a switching function.

M 2, MV, M 2 ') can be controlled. Even at the location of a multiple-distance regenerator

Crossing transmission lines can be supplied with a common regeneration cycle. The method according to the invention brings the following

Benefits.

The undesired, for example temperature-sensitive

The invention relates to a method and an inherent delay time fluctuations in the intermediate line for synchronizing rain generators that impair the frequency stability of the network in one with pulse code modulation (PCM), are collected by the regenerators operating transmission system, in particular inte- and are therefore harmless.

integrated switching network. In the network nodes, control circuits for

Such line regenerators are ent transmission systems in PCM fine adjustment of the running time at each input required at intervals of about 1.8 km.

Length arranged along the transmission path. You 45 The clock frequency at each input to. Expand service the regeneration of the pulses not only in terms of the holding area of the dragged nodes in terms of amplitude, but also the phase clock generator can be omitted, Features, such as shape and turnaround times, for the line regenerators are cheaper

Transmission in cables suffer from distortion. In addition to the expectation that for clock generation for two amplifiers, the line regenerator contains a clock generator for one or more transmission lines (bundles), which can be used by the arriving shared generator, the irregular and distorted pulse triggered on the basis of Embodiments will be explained in more detail below in the form of a flywheel by means of an invention. High quality resonant circuit an almost uniform · The F i g. 1 shows a section regenerator SR 1, which forms a time grid for the amplified pulse. The timing of the advance generation for one transmission direction takes place for each transmission direction more strongly VV1 with the input E, a Schmitt separator. Trigger STl, a buffer ZSl, one The invention is based on the object of specifying a clock modulator Ml and a power amplifier EVX synchronization method that not only provides a preamplifier with the output A 1, as well as in the other transmission implementation of simpler line regenerators VV2 with the possible, but also brings an improvement for the input E2, a Schmitt trigger ST2, a total transmission system. of a method of the introductory an output amplifier to the output EV2 A 2 entgeschilderten kind, this object is holding erfindungsge- rule amplifier ZS2, a clock modulator M 2 and Outgoing. In addition, a common clock generator Tl is achieved in that the regenerator clock is provided for 65.

outgoing pulses in both transmission directions The mode of operation of the syn-

the phase mean value of the two transmissions is calculated using the pulse diagram directions of incoming pulses is formed. explained according to FIG. At the entrance El will

the input signal α is applied, which after amplification and limitation in the amplifier VVl assumes the form b . From the signal b, clock pulses c are derived in the Schmitt trigger ΑΠ, which are fed to the intermediate memory ZS1 on the one hand and to the clock generator T1 on the other. The signal / present at input £ 2 is used in the amplifier VVT. amplified and limited to signal g. In the Schmitt trigger STl , the clock h is derived from the signal g , which is fed to both the buffer ZS2 and the clock generator Γ1. In the clock generator Tl, a sum clock / is formed from the clocks c and h , in which missing pulses in the clocks c and h are supplemented by means of a circuit that works, for example, in the manner of a flywheel and a clock is derived from the phase averaging d-jrch, which both the modulator Ml as well as the modulator M 2 controls. The output signal is obtained from the content d of the buffer ZS1 and the output signal k is obtained from the content i of the buffer ZS 2. Both output signals e and A: are synchronized due to the common clock m.

The F i g. 3 shows an embodiment of a multiple path generator according to the invention. This consists of two line generators SR 2 and SR 3. Both differ from the one described with reference to FIG. 1 only in that they both together have a common clock display T 2 .

The mode of operation of the dual-line generator according to FIG. 2 differs from the one after Fig. 1 in that the clock generator 72 dt: n phase average of all four incoming pulses

ίο determined and with this generated the regeneration cycle m, which is fed to all four cycle modulators. The regenerator m, for example, \ in the way ', ST2' c from the four-Schmitt triggers of the 5TL, ST2, STI output clock pulses Λ, c \ h '

can be obtained that four pulses, and each one of each clock pulse was replaced with if necessary missing pulses are combined and a sawtooth voltage according to their phase position scan. From these four samples whose

ao respective amplitude of the thus-Ph. isenlage dependent of the corresponding pulse, a mean value is formed as a control voltage which controls a generator located in the clock generator T 2 so that the Regeneriertakt generated by it in on

as sets the phase average. ;

1 sheet of drawings

Claims (2)

¹ The derivation of a cycle from the phase mean Patent claims: I. Procedure for the synchronization of route ™ ν. lyoo. Synchronization of the switching regenerators in one with pulse code module 5 there only the y working transmission system, especially " ¹ JJ"' _d designation averaging or auto intergrierten switching network, characterized overall _{w "c} u" process is further described in which this method indicates that the regenerator cycle (m) ^^^^ tmationta telephone communication for the in both transmission directions ^ ab- f ^ei * ™ }? _{96% issue} 1, pp. 48 to 59, described, pending pulses (*, *) from the phase mean of the «techmk <ν ^, ^ _{ßere traffic} between _{Arriving from both directions of} transmission, Jy ^ tüungskn oten system bundle provided, the pulses (α, f) is formed. - «is« advantageous if a regenerator cycle for 2. The method of claim 1, characterized overall> o ^ ™™ ^{it is} _{white in both} n übertragungsnch- indicates that a regenerator cycle (m) for all regenerators departing from the _line all from at least two in both transmission * - t ₅ amgen, ^ naen ^^^^ _{all in these} n _{directions working distance regenerators} ° JJ ™ * „eratorea incoming pulses are formed (SR 2 SR 3) outgoing pulses from the phase btrecKenregeneraiu The mean / value of all in these line _{regenerators is created} per transmitted (SR2, SRS) incoming pulses. b. n,> «*« «\ | _Chain circuit from a pre-^ 3. device for performing the process - ^ f ^^^^ ". Triggerf an intermediate according to claim 1 or 2, using ν" strong, emem _{dulator and a} m _pu ls of line regenerators, per transmission - ^ ™ ^he '^ "amplifier. If for several devices consisting of a chain circuit of g ^ J ^^^ SSn a regeneration cycle formed a preamplifier, a Schmitt trigger, ^^" Jf ^ st ^ advantageous if a common one buffer , a clock modulator, 5 ^ _r ⁿ _z . ^; ^S ^ _g es _e hen, which consists of all incoming and one pulse-forming line amplifiers, da- ^ akte ^ uger ν g. _{] worth and from this} m