KR840001253B1 - Signal device of telephone - Google Patents

Abstract

In a signal device for a telephone, a bridge rectifier circuit is connected between the user-lines (L1) (L2), and a melody-memorized IC is operated by an output of the rectifier. The melody sound of the IC sounds with a receiver (R) through the amplifier circuits(TR1, TR2, TR3), and the contact points of the hook switch are converted by raising the hand-set. The rectifier output is charged by the condensors (C1-C), and which also server as the power source for the IC and the amplifier circuit.

Description

Signaling device of a telephone

The accompanying drawings are schematic diagrams of embodiments of the present invention.

* Explanation of symbols for main parts of the drawings

R: Handset T: Handset

IC: Integrated circuit with melody TR ₁ -TR ₄ : Transistor

D ₁ -D ₆ : Diode SW ₁ , SW ₂ : Interlocking Rotary Switch

FS ₁ -FS ₄ : Interlocking pushbutton switch af: Hook switch according to the present invention

C ₁ -C ₉ : condenser R ₁ -R ₄ : resistance

L ₁ , L ₂ : Visible particle beam

The present invention relates to a signaling device of a telephone, and more particularly to an improvement in the calling apparatus of a subscriber telephone.

In a conventional telephone, the subscriber's call is such that the power consumption of the gayger's switchboard, which causes the ringer in the telephone to ring by an alternating voltage, cannot be ignored. .

The present invention is to install an integrated circuit that stores a melody that operates at a small power instead of the ringer circuit of the subscriber telephone, so that the melody sounds to the receiver's handset as the output of the integrated circuit, the power consumption is much reduced than before.

Accordingly, an object of the present invention is to insert a electronic circuit in place of a conventional ringer so that a beautiful melody sound can be heard in a caller's telephone, and to achieve miniaturization and light weight.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In a known telephone consisting of an induction coil (L), a telephone receiver (T), and a telephone receiver (R) and a dial (D), a ringer circuit connected between the subscriber lines (L ₁ ) and (L ₂ ) is removed and a diode A bridge rectifier circuit composed of (D ₁ , D ₂ , D ₃ , D ₄ ) is provided, and a part of its output is a signal of a known integrated circuit (IC: 7920) in which a melody is stored through a resistor (R ₃ ). Connect to pin 3, the input terminal, and part of the power supply terminal of the integrated circuit (IC) via the parallel circuit of the capacitor (C ₆ ) and the resistor (R ₁ ) between the diode (D ₅ ) and the capacitor (C ₂ ) The pin was connected to pin 5, and the rest was connected to the collector of transistor TR ₂ between diode D ₆ and capacitor C ₃ .

Pin 6, the output terminal of the integrated circuit IC, is connected to the base of the emitter grounded transistor TR ₁ through a capacitor C ₇ .

The transistor receiver (R) the collector of the (TR ₁₎ is applied to the base of the amplifying circuit of the transistor (TR _2, TR _3), the collector of the transistor (TR ₂₎ through the hook switch (f), and the rotary switch ( The rotary switch SW ₂ interlocked with the SW ₁ ) is a collector of the transistor TR ₁ through the hook switch e and the resistor R ₁ , the transistors TR ₂ , and TR ₃ . The resistor R ₂ and the capacitor C ₄ are connected in series to the emitter of the transistor TR ₂ and the emitter of the transistor TR ₃ .

In this state, the subscriber puts the handset of the telephone on the telephone, wherein the pushbutton switches FS ₁ and FS ₂ are opened, and the pushbutton switches FS ₃ and FS ₄ are It is closed.

In addition, the hook switches (a) and (b) inserted according to the present invention are connected to the bridge rectifier circuit in a closed state, the hook switches (c) and (d) are opened, and the hook switches (e) and (f) are In a closed state, the rotary switch SW ₂ and the transistor TR ₂ are connected to the receiver R.

Referring to the working relationship of the present invention.

In the above state, when a call signal, i.e., a call signal of alternating current from the telephone exchange station, flows through the subscriber lines L ₁ and L ₂ , the resistances of the capacitor C ₅ and the rotary switch SW ₁ are reduced. In the bridge rectifier circuit consisting of diodes (D ₁ ), (D ₂ ), (D ₃ ) and (D ₄ ), the rectified current charges the capacitors (C ₁ ), (C ₂ ) and (C ₃ ), respectively. At the same time, it is applied to pin 3, which is the signal input terminal of IC, and pins 5 and 8, which are the power supply terminals, to operate IC. The output is amplified by an amplifying circuit composed of transistors TR ₂ and TR ₃ by turning on transistor TR ₁ through a capacitor C ₇ , and the receiver R stores the beautiful information stored in the integrated circuit IC. Melody sounds.

When the subscriber picks up the handset, the hook switch (a) is opened with the rotary switch (SW ₁ ), the hook switch (b) is connected to the telephone circuit, and the hook switches (c), (e), (f), ( d) is that the contact of the contact is switched so that the receiver R is connected like a known telephone circuit and can talk.

However, since the call signal coming from the telephone station is not interrupted but is interrupted every two hours (2 seconds to 1 second), the IC is also interrupted. However, the bridge rectifier circuit composed of diodes D ₁ -D ₄ occurs. The capacitors C ₁ , C ₂ , and C ₃ installed at the output side of the battery are initially charged and then discharged while the call signal from the telephone station is interrupted for a short time. The IC and the transistors TR _{1 to} TR ₃ are discharged. The melody stored in the integrated circuit IC is continuously amplified by the transistors TR ₁ -TR ₃ to be ringed by the receiver R continuously.

Therefore, the call signal is repeated when the AC signal current flows for 1 second and then cuts off for 2 seconds. Therefore, for 2 seconds when the signal is cut off, the power charged in the capacitors C _{1 to} C ₃ is discharged to discharge the integrated circuit IC. By continuing to operate the melody ringing in the handset (R) will always maintain a constant level.

On the other hand, when the handset is lifted from the telephone, the connection of the hook switches (a), (b), (c), (d), (e) and (f) is the same as described above. ₁ ) Since the discharged circuit is composed by switching the hook switch C, the integrated circuit IC stops operation and the amplification circuit composed of transistors TR ₁ -TR ₃ does not operate. It becomes possible.

In addition, interlocking the rotary switches (SW ₁ ), (SW ₂ ) to convert several different resistors is to adjust the power consumption by adjusting the volume of the capacitor (C ₁ ), (C ₂ ), (C ₃ ) to adjust the charging voltage.

In addition, by separately providing each capacitor (C ₁ ), (C ₂ ), (C ₃ ), and supplying power to adjust the external rate of sound, in particular, the capacitor (C ₁ ) is integrated circuit (IC) and the transistor will serving to detect the operation and the stop of the (TR ₁ -TR _2), diode (D ₁ -D ₆₎ is also so that the current flows only in the forward direction, each capacitor (C _1), (C ₂ ), to prevent the loudness and soundness of the sound by maintaining the intrinsic value of the charged current of (C ₃ ).

In addition, the capacitor C ₃ operates the integrated circuit IC and there is almost no change in voltage. The capacitor C ₃ operates the amplification circuit, and the change in voltage (about 0.3-0.4 V) is large.

The push button switch (FS ₁ -FS ₂₎ provided in the circuit diagram when the switch contact by pressing the push switch Burton (FS ₁ -FS ₂₎ as a switch to use while waiting for the called party to the called party holding the handset both The melody flows continuously to the receiver R of the bar, so that the called party picks up the handset, so the switch contact a is switched from the rotary switch SW ₁ to an impulse contact spark-resistant resistor, and the hook switch contact (b) is switched from the bridge rectifier circuit to the handset circuit of the telephone, and constitutes a normal telephone call circuit, but by pressing a pushbutton switch, the contacts FS ₁ and FS ₂ are connected to the subscriber line L _1. ), (L ₂ ) are connected to the bridge rectifier circuit, so that the subscriber loop current flows instead of the signal current so that the bridge rectifier circuit and the integrated circuit operate, and the amplifier circuit operates. While the melody flows through the receiver R of the own (calling subscriber) phone via the denser C ₈ , the other party (calling through the subscriber line L ₁ and L ₂ in the receiver R). Subscribers) Melody sounds are also flowing to the phone.

When the next call is pushed again the push button switch (FS _1- FS ₄ ) is restored to the circuit of the conventional telephone by the push button switch is restored, the melody is cut off and the call becomes possible.

The tempo of the melody can be adjusted by the variable resistor VR connected between the first and second terminals of the integrated circuit IC. Therefore, according to the present invention, by operating an integrated circuit that stores a melody that can be operated even at a fine power instead of the conventional ringer, it is possible to save power consumption and to have a melody flow out during standby.

Claims (3)

In connecting the bridge rectifier circuit between the subscriber lines L ₁ and L ₂ and operating the integrated circuit IC in which the melody is stored at its output, the melody sound of the integrated circuit IC is amplified. Ring the receiver R directly through the circuits TR ₁ , TR ₂ , and TR ₃ , and lift the handset to switch the contacts (a, b, c, d, e, f) of the hook switch to block the signal. Therefore, it is connected with a known telephone circuit to make a call, and the output of the bridge rectifier circuit is charged to a capacitor (C ₁ -C ₃ ) to be supplied to the power of the integrated circuit and the amplification circuit, and the power is selected by the resistance of the rotary switch. Signaling device of the telephone, characterized in that the adjustment. The signal device of a telephone according to claim 1, wherein the rotary switches (SW ₁ ) and (SW ₂ ) allow a selector of several resistors to adjust and supply power. The signal device of claim 1, wherein the hook switch (C) bypasses the power charged in the capacitor (C ₁ ).

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