JPH05284196A - Telephone set - Google Patents

Abstract

PURPOSE:To enable a telephone subscriber to recognize the ringing tones even if the subscriber is at a rempte place from a telephone set or even in a noisy environment by gradually increasing the volume of the ringing tones after the incoming of a call. CONSTITUTION:When the incoming signal received from a subscriber circuit 630 is detected by an incoming circuit 500, a high level '1' is outputted to a time counter 320 of a ringing tone production circuit 300. The basic pulses produced by an oscillator 310 are counted when an incoming informing signal 620 is set at '1'. Then the time elapsed from the incoming of a call is monitored and the sound volume control signals 600 and 601 showing the pulse counting results are outputted. Under such conditions, an amplification factor selector 230 outputs the level '1' to one of electronic switch control signals 241-244 in response to both signals 600 and 601. Then the switch corresponding to the electronic switch control signal that received the level '1' conducts. Thus the amplification factor of a ringing tone volume control circuit 200 is decided and outputted to a speaker 100.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone, and more particularly to a function for controlling the volume of a ringing tone.

[0002]

2. Description of the Related Art In a conventional telephone, as shown in FIG. 3, an incoming call detection circuit 500 for detecting an incoming call, a ringing tone creation circuit 400 for creating a ringing tone, and the volume of the created ringing tone can be manually changed. Ring volume control circuit 2
00a, and ringing sound volume control circuit 200
A has a variable resistor 10 for manually controlling the volume.

[0003]

This conventional telephone has the following problems.
Since the volume of the ringing tone is always set to the manually set volume, the ringing tone may not be heard or may be too noisy depending on the environment (the noise level) of the user. There is a problem that the user has to manually adjust the volume of the ringing sound each time. Further, if the volume of the ringing tone remains low, there is a problem in that it is not possible to notify the user of the fact that there is an incoming call even after a lapse of time after the incoming call.

[0004]

The telephone of the present invention detects an incoming signal from a line and outputs an incoming notification signal for notifying that an incoming call has arrived, and a ring tone when the incoming notification signal is received. In a telephone provided with a ringing tone creating circuit for producing and outputting a sound volume control signal for monitoring the time elapsed after receiving the incoming call detection signal and increasing the volume of the ringing sound in proportion to the elapsed time. It has a volume control signal generation circuit for outputting and a ring tone volume control circuit for amplifying the ring tone to a volume corresponding to the volume control signal and outputting it to the speaker.

[0005]

The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.

In FIG. 1, the telephone of this embodiment has a line 6
An incoming call detection circuit 500 which outputs an incoming call notification signal 620 for notifying that an incoming call has been received by detecting an incoming call signal from 30;
A ringing tone creation circuit 400 that creates and outputs a ringing tone 610 when receiving an incoming call notification signal 620, and the time elapsed after receiving the incoming call notification signal 620 is monitored, and the volume of the ringing tone 110 is adjusted in proportion to the elapsed time. A volume control signal generation circuit 300 that outputs volume control signals 600 and 601 for increasing the volume, and a ringing tone 610 that controls the volume control signal 6.
The speaker 100 is amplified to the volume according to 00 and 601.
It comprises a ringing tone volume control circuit 200 for outputting to and a off-hook detection circuit 700 for detecting off-hook of a handset (not shown).

In FIG. 1, a volume control signal generating circuit 300 in this embodiment generates an oscillator 310 for generating a basic pulse for counting elapsed time and a basic pulse from the oscillator 310 by receiving an incoming notification signal 620. It comprises an elapsed time monitoring counter 320 which starts counting and outputs 2-bit volume control signals 600 and 601 corresponding to the elapsed time.

In FIG. 1, the ringing tone volume control circuit 200 in this embodiment can vary the amplification factor of the amplifier 210 by the amplifier 210 for amplifying the ringing tone 610 output from the ringing tone creating circuit 400 and the feedback of the output of the amplifier 210. The resistor 1 and the electronic switch (hereinafter SW) 101 are connected in series, the resistor 2 and SW 102 are connected in series, the resistor 3 and SW 103 are connected in series, and the resistor 4 and SW are connected in series.
A feedback circuit connected between the output side of the amplifier 210 and the “−” input in parallel with 104 in series, a resistor 220 connected between the “−” input side of the amplifier 210 and the ground, and SW101. , 102, 103, 104 are turned on / off by the elapsed time monitoring counter 3
20 and an amplification factor selector 230 that operates according to the volume control signals 600 and 601 from 20.

FIG. 2 is a diagram showing the relationship between the volume of the ringing tone and the time elapsed after the arrival of a call in this embodiment.

Next, the operation of this embodiment will be described with reference to FIGS.
Will be explained together.

When the incoming call detection circuit 500 detects an incoming call signal from the subscriber line 630, an incoming call notification signal 620 for notifying that an incoming call has arrived is provided in the ringing tone generation circuit 400 and the volume control signal generation circuit 300.
A high level “1” is output to 0.

The ringing tone generation circuit 400 outputs the ringing tone 610 to the input of the amplifier 210 in the ringing tone volume control circuit 200 when the incoming call notification signal 620 becomes the high level "1".

The elapsed time monitoring counter 320 monitors the time elapsed after receiving a call by starting the counting of the basic pulse from the oscillator 310 when the counter reset signal is released when the incoming notification signal 620 becomes high level "1". The volume control signals 600 and 601 composed of 2 bits for displaying the count result are output.

The volume control signals 600 and 601 are connected to the amplification factor selector 230 in the ring tone volume control circuit 200, and the amplification factor selector 230 is connected to the volume control signals 600 and 6.
The high level "1" is output to one of the electronic switch control signals 241 to 244 corresponding to 01. The electronic switch control signals 241 to 244 are connected to the SWs 101 to 104, and when a high level “1” is given to the control signal, the corresponding SW becomes conductive, and the ringing volume control circuit 2
The amplification factor of 00 is determined, and as shown in FIG.
Output to 00.

The volume of the ringing tone 110 is given by the following equation.

V _O = (1 + R ₁ / R ₂ ) V _I However, V _O : Volume of the ringing tone 110 V _I : Volume of the ringing tone 610 R ₁ : Resistance value of the resistor 220 R ₂ : Selected resistance Resistance values of the devices 1, 2, 3, 4 Also, the off-hook detection circuit 700 detects that the subscriber picks up the handset in response to the call, and sets the off-hook detection notification signal 701 to the high level "1". The off-hook detection notification signal 701 is connected to the incoming call detection circuit 500, and the off-hook detection notification signal 701 is reset when the off-hook detection notification signal 701 becomes the high level "1" and is output.
20 is set to low level "0".

As a result, the ringing tone generation circuit 400 stops producing and outputting the ringing tone, the elapsed time monitoring counter 320 is reset, and as a result, the ringing tone volume control circuit 200 stops outputting the ringing tone 110.

[0019]

As described above, according to the present invention, the volume of the ringing tone is gradually and greatly changed according to the elapsed time from the arrival of the incoming call. It is possible to make the subscriber recognize the ringing tone even when the user is at a remote place.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between a volume of a ringing tone and an elapsed time after an incoming call in the present embodiment.

FIG. 3 is a diagram showing an example of a volume adjusting system for ringing tones in a conventional telephone.

[Explanation of symbols]

1, 2, 3, 4 resistors 10 speakers 101, 102, 103, 104 electronic switches (S
W) 110 ringing tone 200, 200a ringing tone volume control circuit 210 amplifier 220 resistor 230 amplification factor selector 241, 242, 243, 244 electronic switch control signal 300 volume control signal creating circuit 310 oscillator 320 elapsed time monitoring counter 400 ringing tone Creation circuit 500 Incoming detection circuit 600,601 Volume control signal 610 Ring tone 620 Incoming notification signal 630 Line 700 Off-hook detection circuit 701 Off-hook detection notification signal

Claims (1)

[Claims] 1. An incoming call detection circuit that outputs an incoming call notification signal that detects an incoming call by detecting an incoming call signal from a line, and a ringing tone creation circuit that creates and outputs a ringing tone when the incoming call notification signal is received. In a telephone equipped with
Monitor the time that has elapsed since receiving the incoming call detection signal,
A volume control signal generation circuit that outputs a volume control signal for increasing the volume of the ringing tone in proportion to the elapsed time, and a call that amplifies the ringing tone to a volume corresponding to the volume control signal and outputs the amplified tone to the speaker. A telephone having a sound volume control circuit.