KR810000817Y1 - Tone-ringer - Google Patents

Abstract

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Description

Tone Ringer for Telephone

1 is a circuit diagram of a tone-ringer according to the present invention.

2 is an internal block diagram of a ringer chip used in the present invention.

The present invention relates to a ringer used in a telephone, and more particularly, to a tone-ringer for driving a speaker using electronic circuits.

Conventional ringers used in telephones were mechanical bells, so the sound was so loud and sharp that they could not have a hearing crush.

Therefore, an object of the present invention is to provide a tone-ringer that can produce a softer and more elegant tone than a mechanical bell, and at the same time can be further downsized in size and weight.

The tone-ringer according to the present invention is a power supply including a capacitor for dropping the DC voltage drop, four diodes forming a bridge circuit and a smoothing capacitor, a Zener diode and a resistor for voltage drop, and clipping. a signal input including a clipping diode and a voltage stabilizing resistor, a time constant containing a time constant capacitor and two resistors, an output including a variable resistor, an output transformer and a speaker, and a ringer chip It is composed of a (chip), with reference to the accompanying drawings will be described in detail the configuration and operation of the present invention in detail as follows.

In FIG. 1, the portion indicated by the dotted line 100 is the power supply unit. One end of the DC blocking capacitor 101 is connected to one input terminal 001 of the tone-ringer to be connected to one axis of the telephone line, and the other end of the capacitor is connected to one end of the voltage drop resistor 102. The other end of the resistor 102 is connected to one input of a bridge rectifier consisting of diodes 103, 104, 105 and 106, and the other input terminal 002 of the tone-ringer to be connected to the other axis of the telephone line is the other end of the bridge rectifier. It is connected to the input terminal. A smoothing capacitor 107 is inserted across the output of the bridge rectifier, and the output of the bridge rectifier is connected to power input terminals 8 and 4 of the Ringer-Chip 500 described later.

The part indicated by the dashed line 200 shows the signal input unit. The voltage drop Jenny diode 201 is connected to the connection point between the capacitor 101 of the power supply 100 and the resistor 102 to take a line input signal, and the other end of the zener diode 201 is connected to the voltage drop resistor 202, which is connected to the resistor 202. The other end is connected to the signal input terminal 5 of the Ringer chip 500. A clipping diode 203 is connected between the line signal input terminal 5 and the power input terminal 8 of the ringer chip 500, and a clipping diode 204 and a voltage stabilizing resistor 205 are connected between the line input terminal 5 and the power input terminal 4 of the ringer chip 500. In parallel, the signal from the telephone line is clipped to an appropriate level and applied to the signal input terminal 5 of the ringer chip 500.

The part indicated by the dotted line 300 is a time constant part. The time constant setting resistors 301, 302 and the capacitor 300 are connected to terminals 1,2 and 3 for the time constant circuit of the ringer chip 500, respectively, to determine a reference frequency of 5,120 Hz in the ringer chip 500 which will be described later.

The part shown by the dotted line 400 is an output part. The variable resistor 401 is connected to one output terminal 7 of the ringer chip 500, and the other end of the mask resistor 401 is connected to one side of the primary shaft of the output transformer 402. The other end of the primary shaft of the output transformer 402 is connected to the speaker 403 at the secondary shaft of the output transformer 402, which is directly connected to the other output terminal 6 of the ringer chip 500, thereby generating sound according to the large signal output of the ringer chip 500. It is supposed to be.

2 is an internal block diagram of the Ringer chip 500. The Ringer chip 500 includes an 8ms filter circuit 501, a dial pulse reject filter circuit 502, a 2: 1 multiplex circuit 503, a reference frequency generator circuit 504, and a ÷ 8 / ÷ 10 division circuit 505. And an output circuit 506, a ÷ 10 division circuit 507, and a six-stage division circuit 508.

The input signal applied to the signal input terminal 5 of the ringer chip 500 through the signal input unit 200 is removed from the 8 ms filter circuit 501 and the signal having a pulse width of 8 ms or less is removed to the dial pulse reject filter circuit 502 and the 2: 1 multiplex circuit 503. Each is applied. The dial pulse reject filter circuit 502 removes signals below 16 Hz and sends them to the 2: 1 multiplex circuit 503. The 2: 1 multiplex circuit 503 combines the signals applied from the 8 ms filter circuit 501 and the dial pulse reject filter circuit 502 to control the operation of the output circuit 506 as its signal output. This action prevents ringer malfunctions, which may be caused by a 10pps pulse generated when the user taps or rotates the hook switch.

On the other hand, the reference frequency generating circuit 504 is connected to an external time constant circuit through terminals 1, 2, and 3 to generate a reference frequency of 5,120 Hz, and the signal of the reference frequency is ÷ 8 / ÷ 10 frequency division circuits 505 and ÷ 10. It is applied to the frequency divider circuit 507, respectively. The reference frequency of 5,120 Hz is divided by the ÷ 10 division circuit 507 at a frequency of 512 Hz and applied to the six-stage division circuit 508. The six-stage divider circuit 508 re-divides the frequency of 512 Hz to generate signals with frequencies of 128 Hz, 16 Hz and 8 Hz, and the 128 Hz and 8 Hz signals are supplied to the required 8 ms filter circuit 501 and the dial pulse reject filter circuit 502, respectively. The 16 Hz signal is supplied to the ÷ 8 / ÷ 10 frequency division circuit 505 to control the operation of the ÷ 8 / ÷ 10 frequency division circuit 505. Accordingly, in the ÷ 8 / ÷ 10 frequency division circuit 505, ÷ 8 and ÷ 10 frequency division circuits operate alternately according to the control signal of 16 Hz with respect to the reference frequency of 5,120 Hz so that frequencies of 640 Hz and 512 Hz alternate 16 times every second. A tone signal is generated and this signal output is applied to the output circuit 506.

The output circuit 506 amplifies the tone signal of the ÷ 8 / ÷ 10 division circuit 505 and supplies the amplified tone signal output to output terminals 6 and 7 of the Ringer chip 500. At this time, the operation of the output circuit 506 is controlled according to the control signal of the 2: 1 multiplex circuit 503.

Under normal conditions, the power supply unit 100 does not operate by the DC blocking capacitor 101. However, when the call signal (20 Hz) is applied through the lines 001 and 002, the power supply unit 100 operates to supply a power voltage to the ringer chip 500, and this operation is continued while the call signal is applied. Thus, a signal output of a ringer chip 500 Hz is generated, which is applied to the speaker 403 of the output 400 connected to the terminals 6 and 7 to generate sound. The variable resistor 401 is adjusted by the user to obtain the desired loudness. For example, the pulses generated when the handset is held up by tapping the hook switch or rotating the dial are operated by the operation of the 8ms filter circuit 501 and the dial pulse reject filter circuit 502 of the ringer chip 500. By controlling the 506, the tone output does not appear at the output terminals 6 and 7 of the Ringer chip 500, so that the speaker 403 produces no sound.

The tone ringer according to the present invention has a loudness of more than 75 decibels at a distance of 0.5 meters from the speaker, and the generated sound is a tone made by a single oscillation frequency method by a transistor or a mixed frequency completely different from the conventional bellinger frequency component. It has a very soft and elegant sound and can be further miniaturized in size and weight because it is constructed using an integrated circuit such as a ringer chip.

Claims (1)

In the telephone tone ringer composed of the power supply unit 100, the time constant unit 300, the output unit 400, the ringer chip 500, etc., the capacitor 101 and the resistor 102 of the power supply unit 100 The first diode 201 and the resistor 202 are connected in series between the junction point and the enable terminal 5 of the ringer chip 500, and the enable terminal 5 and the Vss terminal 4 of the ringer chip 500 are connected in series. Tone ringer for the telephone formed by connecting the second diode 204, the resistor 205 of the parallel connection between the third diode 203 between the Vbb terminal 8 to configure the input unit 200.