JPH02281823A - Radio selective calling receiver - Google Patents

Abstract

PURPOSE:To constitute this receiver so that a ring-back tone can be heard even in the case of listening to an acoustic apparatus with a pair of headphones by disconnecting an external audio frequency signal by operating a switching circuit, and also, outputting a call informing signal to the pair of headphones, when an inter-call selective calling signal containing the same call sign as the own station call sign is received. CONSTITUTION:A decoder 4 compares and collates an inputted digital signal and the own station call sign data stored in advance in a ROM 5, and in the case of the own station call sign, a call informing signal is generated by starting a call informing signal generating circuit 6, and also, a switching signal for operating a changeover switch 7 is outputted. In the case of a switching signal is inputted from the decoder 4, the changeover switch 7 cuts off an audio frequency signal from an input jack 8 and outputs only a call informing signal generated by the call informing signal generating circuit 6 to a pair of headphones 12 by an output jack 10. In such a way, even when the pair of headphones are being used, reception of the own station call sign can be informed clearly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a selective call notification system for a radio selective call receiver.

[Prior Art] Radio selective calling receivers (hereinafter referred to as
(abbreviated as "receiver"), the reception of the local calling code included in the individual selection calling signal is notified to the receiver user mainly by the sound of a ringing tone.

[Problems to be Solved by the Invention] The conventional receiver described above has a drawback in that when the receiver is used and an audio device such as a stereo phone is listened to through headphones, the ringer cannot be heard.

Furthermore, the ringing tone has the disadvantage that it gives auditory discomfort to people around the receiver.

Some receivers are equipped with a vibrator function to compensate for these shortcomings, but this type has the disadvantage that the receiver must be worn at all times by the user. .

On the other hand, there is a drawback that the reception sensitivity of the receiver deteriorates when headphones are used frequently on trains or at home.

[Means for Solving the Problems] The present invention provides a receiving circuit that detects a match between a calling code included in a received individual selective calling signal and a local calling code stored in advance, and a matching detection circuit for this receiving circuit. A receiver including a means for outputting a call notification signal to notify the call, an input part capable of inputting an external audio frequency signal, and an output part capable of outputting the external audio frequency signal or the call notification signal. , a switching circuit capable of selectively outputting either the external audio frequency signal or the call notification signal to the output section, the receiving circuit receiving an individual selective call that includes the same call code as the own call code. Upon receiving the signal, actuating the switching circuit to cut off the external audio frequency signal;
The present invention is characterized in that the call notification signal is outputted to the output section.

According to the present invention, the output section is configured with a connector connectable to an external output device, and the radio frequency signal induced in the line to the external output device is transmitted through a coupling port connected to an antenna. There is obtained a receiver characterized in that input can be made to the receiving circuit.

〔Example〕

FIG. 1 is a block diagram showing one embodiment of the present invention. A radio wave received from the antenna 1 is amplified, frequency converted, demodulated, and converted into a digital signal by a radio section 3 whose impedance is matched with the antenna 1 by a coupling circuit 2, and then inputted to a decoder 4.

The decoder 4 compares and verifies the input digital signal with the own call code data stored in advance in the ROM 5, and if it is the own call code, activates the call notification signal generation circuit 6 to generate a call notification signal. and outputs a switching signal for operating the changeover switch 7.

The device includes an audio frequency signal input jack 8 and an output jack 10 connected via a changeover switch 7. A case will be described in which the headphone stereo No. 11 is connected to the input jack 8, the headphones 12 are connected to the output jack 10, and the external switch 9 is closed. In this state, the amplifier 13 is connected to the output jack 10.
When there is no switching signal from the decoder 4, the changeover switch 7 outputs the audio frequency signal input from the headphone stereo 11 connected to the input jack 8 directly to the output jack 10. do. However, when a switching signal is input from the decoder 4, the audio frequency signal from the input jack 8 is cut off and only the call notification signal generated by the call notification signal generation circuit 6 is outputted to the headphones 12 via the output jack 10.

Next, a case will be described in which the headphone stereo 11 is not connected to the input jack 8, the headphones 12 are not connected to the output jack 10, and the external switch 9 is open. In this state, the paging notification signal generation circuit 6 and the amplification circuit 13 are connected at the output jack 10, and when the decoder 4 determines that an n-station calling code has been received, the paging notification signal generation circuit 6 generates a The signal is amplified by the amplifier circuit 13 via the output jack 10 and output from the speaker 14.

Note that when the headphones 12 are connected, the wiring connecting the headphones 12 and the output jack 10 functions as an external antenna by being connected to the wireless section 3 through the coupling port 2.

Furthermore, by connecting an amplifier and a speaker to the output jack 10, it is possible to make a loud sound and to make a notification to a place far from the receiver.

[Effects of the Invention] With the above-described configuration, the present invention can clearly notify reception of a local calling code even when headphones are being used.

Furthermore, since the ringing tone can be output only from the headphones, it does not cause auditory discomfort to people around the receiver user.

Furthermore, it is no longer necessary to keep the receiver attached to the valve all the time.
Like headphone stereos, the receiver can be kept away from the body, such as in a bag.

On the other hand, since the wiring to the headphones can be used as an external antenna, it has the effect of increasing the sensitivity of the receiver.

Jack, 9...External switch, 10...Output jack, 11...Headphone stereo, 12...Headphones, 13...Amplification circuit, 14...Speaker.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of a radio selective calling receiver of the present invention.

Claims (1)

[Claims] 1. A receiving circuit that detects a match between the calling code included in the received individually selected calling signal and a pre-stored calling code of the own station, and a calling notification signal based on the matching detection output of this receiving circuit. an input section into which an external audio frequency signal can be input; an output section capable of outputting the external audio frequency signal or the paging announcement signal; a switching circuit that can selectively output either an audio frequency signal or the call notification signal to the output section, and the receiving circuit receives an individually selected call signal containing the same call code as the own call code. Then, the wireless selective calling receiver is characterized in that the switching circuit is operated to cut off the external audio frequency signal and output the calling notification signal to the output section. 2. The radio selective calling receiver according to claim 1, wherein the output section is constituted by a connector to which an external output device can be connected;
A radio selective calling receiver characterized in that a radio frequency signal induced in a line to the external output device can be input to the receiving circuit via a coupling circuit connected to an antenna.