JPH0445317Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an individual selective calling receiver with audio output, and more particularly to an individual selective calling receiver with audio output equipped with a push-button switch for forced reception.

[Conventional technology]

Conventionally, this type of individual selective calling receiver (Push
Tone & Voice Pager with To Listen function)
is configured to generate a sound output for a certain period of time following a ringing signal generated when a preset calling number is detected. In this case, generally a squelch circuit is used to intermittent audio output depending on the received electric field.

Further, this type of receiver has a function of forcibly enabling a reception operation by pressing down a forced reception push-button switch when it is desired to obtain audio output even in a weak electric field.

[Problem that the invention attempts to solve]

In the above-mentioned conventional individual selective call receiver, the reception operation using the forced reception push button switch can be performed at any time, so the reception operation can be performed even when no call is received.

Therefore, it is possible to easily listen to information transmitted to others, and the transmission of voice information by the individual selective call receiver has no privacy at all.

This poses a problem in that the audio information transmitted by this type of individual selective calling receiver is limited to information that will not cause any real harm even if it is heard by others, which narrows the range of usage methods and users.

The object of the present invention is to provide an individual selective call receiver with a voice output that provides privacy for voice information and can be used in a wider range of applications.

[Means for solving problems]

The individual selective call receiver with audio output of the present invention is
Sets the antenna, reception section, low frequency amplification section, speaker, calling number verification section, sound generation section, squelch section, and generation time of the sound signal that is generated after detecting the own calling number. a first timer to
a second timer for setting a time for generating a signal from the receiving section from the speaker after the sound signal stops;
It has a push button switch for forcibly outputting the signal from the receiving section from the speaker, and the forced reception by the push button switch is effective only within the time set by the first timer and the second timer. It is composed of

In this case, it is preferable to configure the forced reception using the push button switch to be effective only for the time set by the second timer.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a block diagram showing an example of the configuration of a first timer.

In FIG. 1, this receiver has an antenna 1
, a receiving section 2, a low-frequency output control section 3, a low-frequency amplification section 4, and a speaker 5, and further includes a first timer 7, a ringing signal generation section 8, and a second timer connected to a calling number verification section 6. It is equipped with a timer 9. Furthermore, a noise amplifier 21, a noise detection circuit 22, an inverter 2
A squelch section 20 consisting of three parts, and a push button switch section 24 are provided.

The low frequency output control section 3 includes an inverter 10, an OR circuit 11, and AND circuits 12 and 1.
3, an analog switch 14 and a mixing section 15, the receiving section 2, a sound signal generating section 8, a second
The signals from the timer 9, squelch section 20, and push button switch section 24 are logically connected.

Here, the first timer 7 is composed of an inverter circuit 16, a differentiator circuit 17, a rectifier circuit 18, and a monostable multivibrator 19, as shown in the block diagram in FIG. 2, and is started by a falling signal. configured to Further, the push button switch section 24 is composed of a push button switch 25, a resistor 26, and an inverter 27.

Next, this operation will be explained using signal waveforms of each part shown in FIG.

A signal received by the antenna 1 is amplified and demodulated in the receiving section 2 and applied to the low frequency output control section 3, the calling number verification section 6, and the squelch section 20. The received signal is compared with a preset calling number in the calling number matching unit 6, and when they match, a detection pulse S1 is generated. The first timer 7 is started by this detection pulse, and S2
A signal shown in is generated, and in response to this signal S2, the tone signal generator 8 generates a tone signal S6 for a period of time preset by the first timer 7 to notify the carrier of the call.

After the sound signal stops, the second timer 9 is driven by the falling signal of the output signal of the first timer 7, and generates the signal S3 for a preset time. The analog switch 14 is turned on for the time set by this S3 signal, and the signal from the receiving section 2 is applied to the low frequency amplifying section 4 through the mixing section 15.
The voice information received following the calling number is output from the speaker 5.

The audio information output from the speaker 5 is outputted from the speaker 5 by controlling the analog switch 14 on and off by a signal S4 from the squelch section 20 depending on the strength of the electric field. In this case, the squelch section 20
The electric field value is set to ensure sufficient intelligibility for the operation setting level, and in general, if you listen carefully, you can often understand the content even at a level lower than this set electric field value.

Therefore, when the electric field decreases and the squelch unit 20 cuts off the audio information when receiving audio information, by pressing down the push button switch 25, the signal S5 is output from the push button switch unit 24 during that time, and the squelch unit 20 outputs the signal S5. Regardless of the signal S4, audio information is output from the speaker 5, and forced reception becomes possible.

However, in this case, push button switch 2
5 and the output of the second timer 9 are applied to the AND circuit 12. Therefore, when the forced reception operation is performed by pressing down the push button switch 25, the signal S3 output by the second timer 9 is output. It is valid only during the period during which the audio information is received, and the audio information received only during this period can be continuously received without interruption, making it possible to listen to the contents.

Therefore, in this receiver, when a call is received, and only for the period set by the second timer,
Forced reception using a push-button switch is now possible, and voluntary reception on a receiver that is not receiving a call is no longer possible, unlike in the past. This provides privacy for the receiver, allowing this type of receiver to be widely used.

In the embodiment described above, the forced reception by the push button switch is valid only during the time set by the second timer 9, but in addition to this, the configuration is configured such that it operates effectively also during the time set by the first timer 7. You can also use it as

[Effect of idea]

As explained above, the present invention includes a first timer that sets the generation time of the ringing signal that is generated after detecting the own calling number, and a signal from the receiving unit that is generated from the speaker after the ringing signal stops. The device is equipped with a second timer for setting the time for transmission, and is configured so that forced reception by the push button switch is valid only within the time set by the first and second timers. The voice information can only be received by the person carrying the call notification, and the voice information has the effect of providing confidentiality and making it possible to use the receiver widely.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the receiver of the present invention, FIG. 2 is a block diagram of the first timer, and FIG. 3 is a time chart of each signal. DESCRIPTION OF SYMBOLS 1... Antenna, 2... Receiving section, 3... Low frequency output control section, 4... Low frequency amplification section, 5... Speaker, 6... Calling number verification section, 7... First timer, 8 ...Sound signal generation unit, 9...Second timer, 10...Inverter, 11...OR circuit, 1
2, 13...AND circuit, 14...analog switch, 15...mixing section, 16...inverter, 1
7... Differential circuit, 18... Rectifier circuit, 19... Monostable vibrator, 20... Squelch section, 21... Noise amplifier, 22... Noise detection circuit, 23... Inverter, 24... Push button switch section , 25...Push button switch, 26
...Resistor, 27...Inverter, S1 to S6...
signal.

Claims (1)

[Scope of claim for utility model registration] (1) An antenna, a receiving section, a low frequency amplifying section, a speaker, a calling number verification section, a sound generating section,
A squelch unit, a first timer that sets the generation time of a sound signal that is generated after detecting the own calling number, and a time that sets the time that the signal from the reception unit is generated from the speaker after the sound signal stops. It has a second timer and a push button switch for forcibly outputting the signal from the receiving section from the speaker, and the forced reception by the push button switch is set by the first timer and the second timer. An individual selective call receiver with a voice output, characterized in that it is effective only during a certain period of time. (2) The individual selective calling receiver with audio output as claimed in claim 1 of the utility model registration claim, wherein the forced reception by the push button switch is valid only for the time set by the second timer.