SU640427A1 - Autobalancing differentiator - Google Patents

Description

one

FIELD OF THE INVENTION The invention relates to radio engineering and can be used by IB equipment and other other technical devices ah.

An autobalance differential device for communication equipment is known, which contains a differential traformer with two half and two. secondary o6MOTKiaiMH, two input terminals of the two-wire line, d.ve Input terminals of the four-conductor transmission, input terminals of the four-wire path, and the secondary windings of the differential transformer are connected according to, and the first terminals of the first and second secondary windings of the differential transformer are connected respectively to the first , and the second input terminal of the transfer of a four-channel WAY.

However, the known device has a poor balance when the line parameters change.

The purpose of the invention is to increase the matching of wave resistances of a two-wire LYANI.I and a four-wire path.

To do this, an autobalance differential communication equipment containing a differential transformer with two ponds and two secondary windings, two input terminals;

two-wire line, two input transmissions of a four-wire path, two input terminals for the reception of a four-wire path, with secondary windings

the differential transformer is connected according to, and the first terminals of the first and second secondary windings of the differential transformer are connected respectively to the first and second

input terminals; four-wire drive transfer terminals; a balanced transformer and six resistors, the balanced transformer M contains two primary and one secondary windings, while

the first and second input terminals of the two-wire line are connected respectively to the first terminals of the first and second primary windings of the differential transfarmatara, the first terminal of the first primary

differential transformer winding: the mater is connected to the first lead of the second primary switch: the differential transformer is connected through the first resistor, the second input terminal is connected to the first input terminal of the four wire path, and the second terminal (the output windings of the differential transformer connected to the appropriate first output primary

The windings of the balonon transformer | Matora, the second pins of which are interconnected via serially connected second And third | resistors, the connection point of which is connected to IK of the second introductory "four-conductor prim lemma, nip," this is the first, secondary ball water The T.ra.nformer is connected to the second connection point of the secondary winding, to the differential T | ranpo1p1matora, the second output of the secondary winding of the balanced tra; the transformer is connected via a fourth resistor to the input four-conductor input terminal of the transfer th TpaiKTa and through a fifth resistor to the second lead-Klamm chetyrehlrOBOdiogo transmission path, and the sixth resistor .podklyuchel parallel with the secondary / bmogke balaionogo Transfrm | pM; Ator.

The drawing shows the electrical principle of the proposed device.

The autobalance differential device DL | I of the communications communications apparatus contains a differential transformer / s with two external 2, 3 and two secondary, and 4, b windings | M | I, two input terminals 6 7 two-wire lines, two input terminals of transmission 5 9 four-route connection, two input terminals of reception 10 and 11 of the four-branch tract, with the secondary windings of 4 5 differential transformer 1 (included according to, and the first (CONCLUSIONS of the first 4. and second 5 secondary windings of differential tr: transformer / connected respectively to the first and The second transfer terminals of § and 9 are a four-wire contact, a balanced transformer 12 and six 13-1 / S resistors are inserted, the bad transformer 12 contains two wireless terminals 19, 20 and one secondary 2} winding, with the first and second input terminals 6 and 7 of the two-wire line are connected respectively to the first Terminal of the LEVER 2. and the second 3 primary windings of the differential transducer /, the first terminal of the secondary winding 2 of the differential transformer: / connected to the first terminal of the second primary winding | and 3 differential for the transformer 1 through the iRi resistor 13, the second input 1C terminalM1a7 of the two-wire line connecting to the first input terminal iriem 10 of the four-wire path, First, the second terminals Pe (rvich; ny windings 2 and 5 of the differential t | ran-for; mator, and / i connected to the corresponding the first pins of the primary windings 19 n 20 of the balais transformer 12, the second pins of which are connected between each other through successively connected: the second and the third resistors 14 and 15, the connection point (the DI1 of which is connected to the second input terminal of the reception 11 is four-way single The second terminal is connected to the connection point of the secondary windings 4 and 5 of the differential transformer /, the second terminal of the secondary winding 21 of the balanced transformer 12 is connected via the fourth resistor 16 to the first input terminal 5 The first 8 of the four-conductor path and the fifth resistor 17 from the second input terminal; my transceiver 9 of the four-conductor path, and the sixth resistor 18 is connected in parallel to the secondary 10 of the balanced 10 transformer 12.

The device works as follows.

AUTO | balanced device containing

5 two iHa bridges to the base of two identical transformers / and 12, (does not have a balaic circuit, the essence of balancing is to match the load of the balancing transformer 12 with the national load of the differential transformer 1 in order to preserve the identity of all the parameters of one transformer relative to the other in the transfer mode, which is necessary to obtain Independence of the system from the parameters of the LI of research institutes. In this case, the output at the input terminals of transfer 5 and 5 in transfer mode is always zero.

The first bridge is formed by the primary windings 2 and 5 of the differential TpaiHcformator /, the primary windings.and 19 and 20 of the balanced transformer 12, the resistors 13-15 and the two-pin diode with the input clamps 6 and 7, its diagonal includes the input terminals receiving 10 and

5 11 quadrupoid tract.

The second 1MOST is formed by the secondary windings 4 and 5 of the differential trans: form / device / and resistors 16 and 17, the secondary winding 2 / is included in the diagonal of it,

Q parallel which includes a load balancer resistor 18.

When connecting the amplifier to the input terminals | a (M reception 10 "//. The system begins to operate in the mode of leredachi. -At the same time

g branches into both arms of the first bridge.

To create / mini residual voltage or slightly different from it on the secondary windings 4 and 5, the size of the resistors 14 and 15 is selected relative to each other. The primary windings 2 and 3 are turned on according to, and the primary windings 19 and 20 are turned on counter, so the voltage on the secondary winding 21 reaches its maximum value. The secondary winding 21 is included in the diagonal of the second bridge, 0: there are anti-polar currents in both its legs. In this case, the voltage in one shoulder of the second bridge is summed up with the residual cash flow | M secondary windings 4-5, & in the other shoulder is deducted. Resistors 16 and 17 are matched against each other until the residual residual voltage present on the secondary windings 4 and 5 disappears. In order for the residual voltage on the secondary windings 4 and 5

5 is always equal to zero, regardless of the change in the .naipaMenpoB line (from 1 m. Maximum resistance to zero), it is necessary to choose the value of the resistor 18.

It is known that in two identical tracings, connected in series, and the voltage on the secondary windings are equal, and in phase, if, and the load on these windings, the av. , .

The load of the secondary windings 4 and 5 is the amplifier connected to the input terminal, terminal: terminal 1 S. Transmissions S and I resistors 16 and / 7, as well as primary winding 2 and resistor 18, and 1n) The primary windings 2 are the two arms of the BTOiporo bridge, the amplifier key to the transfer input terminals 8 and 9, and the | IO | Store iM.

The decrease in resistance (resistor 18 1po, lower: the value of the n. Voltage on the secondary winding 2.1 to the value of the residual voltage held on the secondary windings 4 and 5. As a result of this setting, the parameters of the differential transformer 1 become identical to the parameter bam. nformator 12.

After resistor 18 resistor 18, the value of resistor 16 relative to resistor 17 is completely iodized, without changing its total value, which gives zero value on secondary windings 4 and 5. (Setting up the system with the selection of the necessary ones. the values of resistors 16 and 17 and resistor 18 are produced by a potentiometer, which, after the system, changes: it changes in size.

System tuning: we are made by an amplifier connected to input terminals 5 and I or the equivalent of 22.

With any change in the line parameters, the magnitude of the currents in the nerve of the bridge changes the npiO and the antenna.

In the autobalances of the device, the primary winding 2 is switched on in series with the primary winding 19 in one arm, and the primary winding 3 is connected to a follower (but with the primary winding 20 in the second arm, i.e. one current transformer | ra.vna resultant currents of the second trannoformat.a.a, and napruzki Ia about; hanks 4, 5 I 2, respectively, are selected.

Thus, when the line parameters change, the residual voltage on the secondary windings 4 and 5 is always zero and (the balance of the device is not disturbed.

When signals of alternating current are received (FROM the two-wire water line, the device operates in IB drift mode. In this case, the primary windings 19 and 20 of the balanced transducer, 12, are switched on and close to zero on the winding terminal 2. Therefore the balance transformer 12 does not accept participation in the receive mode. So j-zaK primary windings 2 3 differential transformers / are switched off according to, the voltage on the input terminals of the transmissions is 8 "9 maximum. The described device does not require adjustment with respect to changing parameters trench line, is incorporated in line with the possibility of switching to other lines without dopol.nitelnoy settings, and at .izmenenii line parameters offline effect of the transmitting device the receiving ua.

Formula and 3 about b ete e .n and

An autobalance differential device for communication equipment containing a differential transformer; a mat with two nerves (And two secondary windings; mi, two terminals of two wires, two input terminals of a four-wire path, two input terminals of a four-wire path , iric secondary windings of the differential transformer are connected according to, and the first terminals of the first and second secondary windings of the differential transformer are connected respectively to the first and second input terminals Reduction of the four-wire path, which is so that, in order to increase the consistency of the wave simulations of the two-wire line and the four-wire path, a balanced T1 transducer | resistor and resistor are introduced into it, and the balance transformer contains two primary and one secondary windings, while the first and second input terminals of the two-wire terminal are connected to the first output terminals: m, 11 of the first and second primary windings of the differential transformer, the first output of the first primary winding differential The primary transformer is connected to the first output of the second primary winding of the differential transformer via the first resistor, the second input terminal of the two-wire line is connected to the first input terminal of the four-wire receiver: act, and the second terminals of the nervous windings of the differential transformer are connected to the corresponding primary terminals of the nervous windings of a balanced transformer The second output wires of which are interconnected through a successively connected second and third resistor, the connection point to which are connected to the second input terminal of the four-wire path, the first output of the secondary winding of a balanced transformer .para is connected to the connection point of the secondary windings of the differential transformer, the curtain of the secondary winding of the balanced transformer is connected to the first input terminal of the transfer transformer. four-wire path and

through the fifth resistor - with the second input terminal of the transmission of the four-wire path, and the sixth resistor is connected in parallel with the secondary winding of the anchor tube.

And with exactly | NI1K .I1N forms and a

taken into account when copying

1. Ziltarenko A. M. Dalnazh. M., 5, Sv, 1970, p. 122-125.

YU

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