DE1512899C3 - Circuit arrangement for telecommunications, in particular telephone systems - Google Patents

Description

3 4

The capacitor discharge circuit via a controllable switching conductor triode (e.g. a thyristor or transistor) inserted according to the invention only takes place if the one whose control electrode has not been inserted into the relevant impulse for these additional circuits, charging circuit, preferably not, but only intended for their preparation. A further development of the invention proposes that one wire of the two-wire supply line is blocked by a half-occurring potential difference during the charging process at this resistor and that a low-conductor triode (e.g. a transistor) is inserted, which becomes so ohmic conductive when the instantaneous value of is polarized that in its low-ohmic conductive charge pulse after its peak state for pulses of the above polarity has been exceeded it is lower than the charge value (in terms of amount) whose control electrode (e.g. B. Base) via voltage of the capacitor and the aforementioned Po- an auxiliary capacitor with the other line wire potential difference thereby reverses its sign. The requirement mentioned at the beginning to avoid that the associated main electrode (e.g. emitter) faces the voltage source that delivers the pulse after the actuation of a switching means, with the energy of the relevant Pulse acts on the anti-paired resistor formed as a rectifier by a further circuit prepared as a rectifier in the control path of the semi-conductor triode from 15 at the control path of the semiconducting triode, is bridged in the aforementioned proposed allele (claim 2).
Order is fulfilled in any case if the pulses that charge the capacitor have a rectangular shape. The auxiliary capacitor is thus charged at the same time - because in this case the capacitor discharge 20 will be charged, namely via the control path of the semiconductor diode inserted into the inflow circuit in which the switching means is active, which means that it is only switched on when the pulse in question is temporarily is actually ended in its low-resistance conductive supply, since its instantaneous value is offset. If the instantaneous value only then falls below the charge voltage of the relevant condenser pulse than the condenser reached in the meantime. The capacitor voltage is now prohibited, the storage capacitor is often using square-wave voltages with back via the switching means assigned to it and the auxiliary view of the disruptive influence of neighboring capacitors via the aforementioned, preferably as electrical circuits. When using a sinusoidal rectifier designed to discharge a resistor formed in this way or a similarly shaped pulse, it is possible to avoid the undesired premature influencing of the undesired premature influence and thus ensure that the remaining time required for the other circuits is delayed «Remote delay from the other circuits can be achieved by holding those that are meanwhile being prepared by the control path of the semiconductor triode responding by means of one of the switching means.
Voltage division from the capacitor voltage. Another development of the invention relates to the partial voltage conducted in the reverse direction in front of a circuit arrangement in which there is a low tension that it is only provided in it with a low-resistance storage capacitor, which becomes even when the instantaneous voltage of the pulse if via the two-wire supply line, however, becomes less than this partial voltage. a charging pulse of opposite polarity

It is the object of the invention that can be charged in the case of and mentioned this in its discharge circuit Arrangements to be observed requirements, 40 direct storage capacitor also switching means annämlich that the switching elements through which they are required will reactivate when they become effective Such a time delay is caused, prepare a further circuit for comparison, which by Imweise must be precisely dimensioned and, if necessary, pulses of the same opposite polarity different line resistances of the bar, whereby the charging circuits of both Speizweiadigen Supply line must be adapted to 45 cherkondensatoren by current direction dependent avoid. Switching elements and / or by means of contacts against one another

The solution to this task is characterized by the fact that the two wires are decoupled

shows that this further circuit also has a semiconductor triode each over the two-wire supply line

a controllable switching element runs, which is inserted through, which with respect to the supply voltage

the discharge current of said storage capacitor 50 are polarized in opposite directions, the control electrodes of which have

tor or one in a parallel branch on an auxiliary capacitor in connection with one another

chargeable auxiliary capacitor or by the stand and their belonging to the control lines

This discharge current is generated at a resistor- main electrodes of the voltage supplying the pulses

fene potential difference in their blocking state are facing the control source and both the is cash. 55 main line as well as the control lines of both half

Compared to the "rigid" time delay that characterizes the conductor triodes of rectifiers antiparallel over-input mentioned arrangements are bridged (claim 4).
The circuit arrangement described can, for example, have the advantage that the measures that are used as a receiving device for apron devices in to avoid the undesired premature transmission of telecommunication systems: a pulse of the same polarity that follows the discharge circuits of the two storage capacitors is a multistable switch, directly from the (in a capacitor distribution device, e.g. the even or discharge circuit) actuation of the switching, odd-numbered chain switching means of a counting chain by means of , that these further circuits are prepared, 65 (whose individual chain switching means depend in loading or on the analog unloading process of an auxiliary know-how for the purpose of the pulse-controlled capacitor n) and if, in separation of these further circuits, one winding of one single

1 U 1ώ OCC7

5 6

stage, trained as a bistable polarized relay and inserted into the charging circuits

th pulse divider circuit is arranged, the rectifiers 4, 5 or 7 (Fig. 1) or 7 or

Contacts of this serving as a pulse divider circuit (Fig. 2), which the control paths of the transistor

Relay and the counting chain are combined in such a way, bypass, get into their blocking state, so c

that in each position of the charged with alternating 5 of the positive occupancy of each

Polarity of successive pulses switching storage capacitor across one of the resistors

a further circuit prepared WiI to WiA control current to the basis of the respective

and that these further circuits switched on transistor can flow. It must be ruined now

if the counting chain in the relevant will be that the remainder of a pulse that the I.

• Impulse controlling the chain position another impulse io control of the bistable polarized relay A

the same polarity is forwarded. has an effect in which this reversal before

The application of the invention to these or ridden circuits for the secondary Schaltmi

Similar arrangements that charge bipolar pulses or charge the charging circuits of the Si concerned

turn, is characterized by the fact that flow can flow in the cheek capacitors. This you will

called another circuit or in one of these 15 the insertion of the transistors T 3 and Γ 5 in

and the charging circuit of the storage capacitor circuit according to FIG. 1 or Γ3 and Γ 4 in

tors jointly belonging current branch a half-circuit according to F i g. 2 reached. This Transisto

Conductor triode is inserted that lock in their low resistance namely. the current flow in the mention

conductive state for impulses of the named PoIa circuits until the current in the cond

rity is permeable and the control electrode of a generator discharge circuit in which the relay A jew

on the one hand via one of the discharge circuit of the storage tank is reversed (Fig. 1) or in the discharge test «

capacitor belonging than for the direction circle of the auxiliary capacitor Ch has dried up. .

of the capacitor discharge current permeable DC The circuit according to F i g. 1 therefore works in follow

Richter-trained resistance with that of the control- the way: By a positive half-wave of the Sp

line belonging to the main electrode and other voltage source U is the capacitor Cl in follow

on the other hand charged via another resistor with the other - the circuit:

ren main electrode is connected and that _vt collector-emitter path (TS), Cl

the two resistors are dimensioned so that the 10 aO b U

Semiconductor triode temporarily through the during '' '

the flow of discharge current at the first-mentioned 30 The transistor T 5 is in this circuit

potential difference that occurs because its base is via the resistance WiS

is cash (claim 3). This arrangement is similar to the collector communicating and the one in

the above-described development of the discharge circuit of the capacitor Cl angec

Invention, but it is noteworthy that Nete rectifier 3 is de-energized until

Pulses that start 35 capacitor discharge one after the other with alternating polarity. The transistor

arrive; do not interfere with each other: During the is due to the rectifier 4 occurs

Charging and discharging of the auxiliary condenser forward voltage blocked. If the positive H;

tors are the two semiconductor triodes alternately wave the voltage source U after exceeding

locked or opened, in such a way that, for. B. their peak value is smaller than the unterdei

during the discharge of the charge voltage of the capacitor C1 reached by a positive 40, v

Pulse charged auxiliary capacitor that half of the rectifier 4 de-energized, so that the Transi:

conductor triode is open, which (due to its polarity T 1 of the positive assignment of the condens

in the line core) for negative impulses through Cl through the resistor WiI a control;

is casual. Since the main line can flow over the other (im

sought time blocked) semiconductor triode of 45 Cl +, 3, A (I), collector-emitter path (J

is bridged in anti-parallel with a rectifier, q ^

So the negative pulse in question reach through and vice versa, switched on for the capacitor Cl and

In the drawing, two exemplary embodiments of relay A are reversed via its winding I. It "'

of the invention shown. It is anord- 5 ° its contact α in position 1, so that Aufk

voltages in which a bistable polarized circuits for the capacitors C 2 or

Relay A via wires α and b are prepared by bipolar. The one in the discharge circuit

Pulses between its two stable states capacitor C1 arranged rectifier 3 sp

is reversible. Meanwhile, with every change of state the transistor TS prepares, so that the rest

it doing a circuit for secondary switching 55 first positive half-wave not in the through

medium Sp or Sn , which take effect when contact al prepared charging circuit

which the reversal of the relay A causing capacitor C 3 can flow. Follows the ers

Impulse another impulse of the same polarity follows. positive half-wave a negative half-wave, so ν

The relay A and the secondary switching means Sp in the circuit

and Sn are not directly 60 _υ ^ _η E ^ tter-Basis-Segment (Γ3), Cl,

influenced, they are rather in the Entladestrom- al b TJ

circulate from storage capacitors C1 to C 4, which ''

in turn are charged by the impulses. The capacitor C 2 is charged. After the η

Discharge circuits are under the switching influence tive half-wave exceeded their peak value

of transistors T1, T2 and Γ4, the low resistance 65 is the discharge circuit for this condens

become conductive when the instantaneous value of the switched on in a similar way as this for

Charging of one of the capacitors causing Kondenstor Cl has been described. In the Entl: Pulse is smaller than the capacitor voltage circuit of the capacitor C 2 is that;

polarized relay A reversed back to the initial position shown, the transistor Γ 3 prevents the rest of the negative pulse from being able to charge the capacitor C 4 after the relay A is reversed. This is because it is blocked by the voltage drop across the rectifier 8 as long as current is still flowing in the discharge circuit of the capacitor C 2. If the first positive half-wave is not followed by a negative, but a further positive half-wave (which can be achieved, for example, by suppressing the negative half-wave in between), then in the circuit

U, a, 1, T5,12, C3, 7, 9, al, b, U

the capacitor C 3 is charged. As a result, the secondary switching means Sp arranged in its discharge circuit can be influenced. Similarly, the capacitor C 4 becomes in the circuit

U, a, 2, 7, emitter-collector path (Γ3), 5, C4,6, aO, b, U

charged by a negative pulse when the bistable polarized relay A is back in its initial position and the contact α 0 is closed. In this way, the secondary switching means Sn can be effectively influenced by two successive negative half-waves.

The in F i g. 2 works in the following way: When the voltage source U emits a first positive half-wave, in the circuit

U, a, 15, 2, Cl, 7, 9, aO, collector-emitter path (T 4), b, U

the capacitor C1 is charged. The transistor T 4 is conductive in this circuit, since the charging

Circuit of the auxiliary capacitor Ch in the circuit

U, a, 16, Ch, base-emitter path (Tl), b, U

flows as a control current over its control path. When the positive half-wave exceeds its peak value and its instantaneous value is again smaller than the charging voltage of the two capacitors Cl and Ch, the transistor Tl switches the

ίο winding I of the relay A running discharge circuit for the capacitor Cl, since the rectifier 7 is de-energized and the base of the transistor Tl is now connected to the positive assignment of the capacitor Cl via the resistor WiI and the rectifier 1. Furthermore, the auxiliary capacitor Ch is discharged through the base-emitter path of the transistor T 3 and the rectifier 17. The transistor Γ 4 is blocked by the forward voltage occurring at this rectifier 17, so that the remainder of the positive half-wave of the meanwhile through the contact al prepared charging circuit of the capacitor C 3 is kept away. A negative half-wave, however, can charge the capacitor C 2 unhindered, since the transistor T 3 through the Entbzw. Charging current of the auxiliary capacitor Ch is controlled in its conducting state and the rectifier 18 is also permeable for this negative half-wave. However, if the negative half-cycle is suppressed, the next positive half-cycle can influence the secondary switching means Sp , since the auxiliary capacitor Ca has meanwhile been discharged and can be recharged in the circuit already mentioned above. In a corresponding manner, two successive negative half-waves can influence the relay A via its winding II and the secondary switching means Sn .

1 sheet of drawings

509 539/4

Claims (4)

Claims: f * lls switching means (A II) are arranged, which be r their coming into effect again another 1. Circuit arrangement for telecommunication, in particular electric circuit (charging circuit of C 3) prepare special telephone systems, in the case of the switching means, which can be influenced by impulses of the same opposite that by the discharge current of a two-way 5 polarity (- to a) , with the Charging circuits of both storage capacitors are charged to the wire feed line (e.g. a telecommunication line) by a pulse of specified polarity- (Cl, C 2) can be actuated by current-direction-dependent switching of the chargeable storage capacitor, elements (2, 13) and / or through contacts (a 0 / 1 in their effect more circuits are decoupled from each other, that in both; prepare the (b a) also over the two-wire supply io wires of the two-wire supply line each extend a <line and by a subsequent Halbleitertriode (transistor T 3, TS ) inserted pulse of the same polarity can be influenced, which is characterized in relation to the supply voltage opposite in that this is set ge poles whose control electrodes are connected to another circuit (e.g. B. Charging circuit of an auxiliary capacitor (Ch) with each other in Ver C 3) are also linked via a controllable switching element 15 and the control path ar (ζ. B. transistor TS) runs through the associated main electrodes (emitters) of the Mad charging current of said storage capacitor pulse supplying voltage source (U) zugewanc (z. B. Cl) or one in a parallel current are, and that both the main line (ζ. Ε branch chargeable auxiliary capacitor (Ch in emitter-collector lines) as well the control Fig. 2) or by the stretch of this discharge current 20 (z. B. base-emitter routes) both at a resistor (3) caused potential semiconductor triodes (T 3, T 4) of rectifier tialdifferenz in their blocking state is controllable (15, 16 or 16, 17) bridged anti-parallel sin (Fig.l). (Fig. 2). 2. A circuit arrangement according to claim 1, · DA by in that in which a wire 25 (e.g. a) the two-wire supply line (α, b) one Semiconductor triode (e.g. transistor Γ3) inserted The invention relates to a circuit arrangement only. is that is polarized so that it is in its low resistance for telecommunications, especially telephone systems, b conductive state for pulses of said Po- the switching means, which by the discharge current a larity is permeable, the control electrode of which (e.g. 30 via a two-wire supply line (e.g. a Fernmeldt Base) via an auxiliary capacitor (Ch) with the line) by a pulse of predetermined polarity; other line core (b) is connected and the chargeable storage capacitor is actuatable sini whose main electrode belongs to its control path when it becomes effective, further circuits vo (e.g. emitter) of the chipboard supplying the pulses, which is also via the two-wire supply line voltage source (U) is facing, and that the 35 run and the by a subsequent Impu Control path of the semiconductor triode (Γ 3) can be influenced by one of the same polarity. The other Resistor (16) designed as a rectifier should, however, only become effective; is bridged antiparallel (Fig. 2). if two such impulses arrive one after the other, 3. Circuit arrangement according to claim 1, there must be avoided that after the B 'characterized in that in the said white 4 ° actuation of the switching means may remain lower circuit (eg charging circuit C3) part of the first pulse on the prepared far or can act in one of this and the charging circuit ren circuits. This can be achieved either by the storage capacitor (e.g. Cl) together by the fact that the switching means of their associated current branch are a semiconductor triode with a time delay that is inserted after actuation (TS) , the pulse duration remaining in its low-resistance, remaining pulse duration is shorter than the A. state for impulses of the said PoIa speaking time which is permeable in a further circuit (e.g. + ana) and their arranged switching means or - conversely, via a control electrode on the one hand - by the fact that the latter has a time delayed charging circuit of the storage capacitor (Cl) are equipped, which is larger than the remaining hearing, than for the direction of the capacitor- 5 "pulse duration. It is also possible to rectify the energy in the discharge current permeable from the individual impulses to the energy requirements of the respective formed resistor (3 ) with the switching means to be operated in the control path örenden main electrode (emitter of 75) »Portioning« can be z. B. with the help of Ene and on the other hand via a further resistor, such as capacitors or inductance (Wi S) make with the other main electrode (collector 55. Of the disadvantages that this Anor tor TS) is related, and that the two If only the dependency c resistances (3, Wi 5) are dimensioned in such a way that the dimensioning of the individual components of the semiconductor triode (T 5) is temporarily mentioned by the line resistance of the supply line, during the flow of discharge current to which it is Sometimes it is necessary to store the individual Impu: the first-mentioned resistor (3) occurring potential ⁶ ° in a capacitor, instead of being immediately lockable (Fig. 1). supply bar to the switching means to be operated u 4. Circuit arrangement according to claim 1, that the switching means to be actuated in an Entlac characterized in that another storage circuit to arrange this capacitor, namely capacitor (C 2) is provided, which also when the maximum 7 Via the two-wire supply line through a power 65 available due to the wi; Charging impulse of opposite polarity (-ana) seeds resistances (e.g. of the resistance ei: is chargeable and in whose discharge circuit telecommunication line) is smaller than the power requirement this further storage capacitor (C 2) also the switching means. It has been suggested for this purpose