JP3390376B2 - Portable radio - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable wireless device of the present invention, and more particularly to a portable wireless device having a function of notifying battery exhaustion.

[0002]

2. Description of the Related Art A portable radio device of this type operates on a battery, but before the battery is exhausted and communication is interrupted, the battery voltage is monitored and an alarm is issued when the voltage falls below a predetermined value. It has a function of outputting and notifying the user and urging the user to replace the battery. As the alarm notifying means, there are various means such as sound from a speaker, display on an LCD or the like, or vibration using a vibrator or the like.

For example, FIG. 5 shows an example described in Japanese Patent Laid-Open No. 9-321836. FIG. 5 is a block diagram showing this conventional example.

The operation will be described with reference to FIG. The battery remaining amount detection circuit 51 detects the remaining amount of the battery, the comparison value 53 is compared with the reference value 52, and when the value is lower than the reference value and in the standby state, the first timer 5 is activated, and the first alarm The circuit 56 generates a first alarm signal until a time-out, and drives a sounding device 57 such as a speaker. Further, in the call state, the second timer 58 is activated, the second alarm circuit 59 generates the second alarm signal until the time-out, and drives the vibration device 60 such as a vibrator. After the first or second alarm is stopped, the third timer 61 is activated, the third alarm circuit 62 generates a third alarm signal after a time-out, drives the sounding device, and turns off the operating power by the power-off circuit 63. Disconnect. When the pressing of a predetermined key of the control unit 64 is detected during the output of the first or second alarm, the first or second alarm is stopped.

That is, if the battery voltage becomes lower than the reference value and the standby state is activated at that time, the sounding device 57 is activated, and if it is in a call state, the vibration device 60 is activated to notify the user.

[0006] In this way, the sounding device 5 is provided in the alarm notifying means.
The reason why the 7 and the vibration device 60 are used properly is that if an alarm sound is generated during a call, it will disturb the call.

[0007]

As described above, in the conventional example, the alarm sound or the alarm vibration is used as the alarm notifying means. However, in the case of the alarm sound, the sound source generating circuit and the speaker are required. In case of alarm vibration, a vibrator etc. is required. Providing these has a problem of burdening the cost and downsizing of the main body. In particular, there is a problem that the alarm sound from the speaker is difficult to hear when used in a noisy environment.

In addition to the conventional example described above, an LCD is generally used.
However, this has a problem that it is difficult to visually recognize the display during a call or in a dark place.

[0009]

SUMMARY OF THE INVENTION A portable radio device of the present invention detects a transmitter and a voice signal from the transmitter and activates the voice signal to convert the voice signal into a radio signal to a partner radio device. A transmitting unit for transmitting, a receiving unit for receiving a wireless signal from a partner wireless device, converting it into an audio signal and outputting the same, a handset for receiving the audio signal output by the receiving unit, and a receiving unit for receiving no wireless signal A squelch circuit that operates so as to prevent the noise from being output to the receiver side by blocking the audio signal output end of the receiving unit and at the same time a control signal is input, and a battery that supplies power to each unit And a voltage detector that outputs the control signal when the voltage of the battery is monitored and becomes a reference value or less.

Further, a transmitter, a transmitter for detecting and activating a voice signal from the transmitter, converting the voice signal into a radio signal and transmitting the radio signal to a partner radio, and a radio signal from the partner radio. Is received and converted into a voice signal and output, a receiver for receiving the voice signal output by the receiver, and a part of the voice signal from the transmitter is input and adjusted to a predetermined level. Also, a voice folding circuit that sends to the example of the handset when a control signal is input, a battery that supplies power to each unit, a voltage detection that outputs the control signal when the voltage of the battery is monitored and falls below a reference value. It may be provided with a section.

Alternatively, a transmitter, a transmitter for detecting and activating a voice signal from the transmitter, converting the voice signal into a radio signal and transmitting the radio signal to a partner radio, and a radio signal from the partner radio. Is received and converted into a voice signal and output, a receiver for receiving the voice signal output by the receiver, and a part of the voice signal from the transmitter is input and adjusted to a predetermined level. And, when a control signal is input, a voice folding circuit that sends the voice signal to the handset side, and when no radio signal is received, the voice signal output end of the receiving unit is blocked to prevent noise from being output to the handset side. At the same time, when a control signal is input, a squelch circuit that operates to open this blockage, a battery that supplies power to each part, and the voltage of the battery is monitored, and the control signal is output when the voltage falls below a reference value. With a voltage detector It may be with.

Further, the voltage detection unit intermittently interrupts the control signal to be output to the squelch circuit at a predetermined cycle when the voltage of the battery drops to a reference value, and the voltage drop of the battery increases. The intermittent cycle may be advanced so that the output is continuously output when the voltage drop of the battery reaches a limit value.

Further, the voltage detection unit uses the control signal output to the voice folding circuit as a voltage signal of a predetermined voltage value when the voltage of the battery drops to a reference value, thereby reducing the voltage of the battery. This voltage value increases as it increases, and when the voltage drop of the battery reaches a limit value, this voltage value is output as a predetermined maximum fixed value, and the voice folding circuit inputs the control signal of the voltage signal. At this time, the voice signal may be transmitted to the handset side, and at the same time, the transmission level may be controlled to increase in accordance with the increase in the voltage value of the control signal.

Further, the voltage detecting section may include a switch for forcibly stopping the output of the control signal.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a circuit diagram showing the configuration of the voltage detection circuit in FIG. 1, FIG. 3 is a circuit diagram showing the configuration of the voice folding circuit in FIG. 1, and FIG. 3 is a time chart explaining the operation of FIG. 1.

In FIG. 1, the portable radio device of the present invention is
The transmitter 7, the transmitter 1 that detects and activates the voice signal from the transmitter 7, converts the voice signal into a wireless signal and transmits the wireless signal to the partner wireless device, and receives the wireless signal from the partner wireless device. Then, the receiver 2 for converting into a voice signal and outputting the voice signal, the receiver 8 for receiving the voice signal output by the receiver 2, and part of the voice signal from the transmitter 8 are input and adjusted to a predetermined level. In addition, noise is output to the handset 8 side by closing the voice folding circuit 3 that sends to the handset 8 side when the control signal 102 is input, and the voice signal output end of the receiving unit 2 when no radio signal is received. At the same time, when the control signal 101 is input, the squelch circuit 4 that operates to open this blockage, the battery 6 that supplies power to each part, and the voltage of the battery 6 are monitored to be below the reference value. With the voltage detector 5 that outputs the control signals 101 and 102 at times Forms.

Referring to FIG. 2, the structure of the voltage detection circuit 5 shown in FIG. 1 will be described. A low voltage detection circuit 51 that monitors the voltage of the battery 6 and outputs a detection signal when the voltage becomes a predetermined reference value or less, and the detection signal and the voltage of the battery 6 are input, and a predetermined low voltage value at this point The control signal 10 has an increasing voltage opposite to the decreasing direction according to the decrease in the voltage of the battery 6 and has a fixed maximum voltage value when the voltage of the battery 6 decreases to the limit value.
Voltage shift circuit 52 that outputs 2 and this control signal 10
The control signal 10 becomes a continuous signal when the pulse period is shortened in proportion to the voltage of 2 and the voltage of the battery 6 drops to the limit value.
The pulse generator circuit 53 outputs 1 and the switch 54 stops the output of the control signals 101 and 102 in response to a stop signal from an operation unit (not shown).

Referring to FIG. 3, the configuration of the voice folding circuit 3 shown in FIG. 1 will be described. A buffer 31 having a high impedance input in order to branch the voice signal from the transmitter 7 to the main transmission line so as not to cause a loss, and a variable attenuator 32 whose attenuation amount is variable according to the voltage value of the control signal 102. , A high-impedance output buffer 33 for returning a voice signal to the handset 8 side.

Next, the operation of the portable radio apparatus of the present invention will be described with reference to FIG. The operation of the radio itself is based on the battery 6
If the voltage is within the normal range, the control signals 101, 102
Is not output, the normal operating state is entered. When the battery 6 is exhausted and the battery voltage reaches the reference value for low voltage detection, the voltage detection circuit 5 outputs the control signals 101 and 102. At this time, the control signal 101 is a pulsed digital signal as shown in the figure, and the control signal 102 is a low voltage analog signal.

The control signal 101 is input to the squelch circuit 4, a squelch switch (not shown) is opened, and the noise output from the receiver 2 is sent to the handset 8 side. At this time, since the control signal 101 has a pulse shape, noise sent to the handset 8 side is interrupted. The squelch circuit 4 receives the control signal 101 in addition to the normal function of blocking the output end so that the noise output from the receiver 2 does not reach the receiver 8 side when the receiver 2 is in the non-input state. It has a squelch switch that opens this block when it is opened.

The control signal 102 is input to the voice folding circuit 3, and the amount of attenuation of the variable attenuator 32 is reduced to control the voice signal from the transmitter 7 to be returned to the receiver 8. At this time, since the voltage of the control signal 102 is low, the amount of attenuation is still large and the level of the return audio signal is low. The call back voice signal is heard as a side tone by the caller, but is set to a level that does not disturb the call. In the state where the control signal 102 is not input, that is, in the normal state, the amount of attenuation of the variable attenuator 32 is sufficiently large, and almost all the return voice signal is in the blocking state.

As described above, when the voltage of the battery 6 reaches the reference value for low voltage detection, squelch noise is heard intermittently in the handset 8 when there is no reception input, that is, when there is no call, and when transmitting. Since the transmitted voice starts to be heard as a return voice signal returned to the handset 8, that is, as a side tone, it can be known from any notification that the battery 6 has entered the region requiring replacement. When the battery 6 is further consumed, the pulse period of the control signal 101 becomes shorter and the squelch noise is interrupted faster.
Further, the voltage of the control signal 102 becomes high, and the variable attenuator 32 is
The amount of attenuation is reduced and the level of the return audio signal is increased. As a result, the degree of battery consumption can be known. When the battery voltage reaches the usage limit value, the control signal 101 becomes a continuous signal and squelch noise is continuously heard. Further, the control signal 102 has a maximum fixed voltage, and the level of the return audio signal is maximum. From this, it can be seen that the battery has reached the limit of use.

When the squelch noise of the battery notification and the return voice signal interfere with a call, a stop signal is input to the switch 54 of the voltage detection circuit 5 by operating a switch on the operation unit (not shown). Control signal 10
The squelch noise and the return audio signal can be stopped by stopping the output of 1, 102.

Although the present embodiment has shown the case where both the squelch noise and the return voice signal are used as the battery notification means, only one of the notification means may be simplified.

[0025]

As described above, the portable radio device of the present invention is a means for notifying battery exhaustion that squelch noise during standby or a return voice signal for returning a transmission voice signal to the handset side during transmission. Since the circuit is used, there is no need to use a notification signal source, and the circuit becomes simple. Therefore, it has an effect of contributing to downsizing and cost reduction of the device. In particular, since the notification sound is heard through the handset, there is an effect that it will not be overlooked even if it is used in a noisy environment.

Further, since it is not a notification means by display, there is no defect that the display is overlooked depending on the usage state, and there is an effect that the notification can be made surely. Furthermore, there is an effect that it is possible to know the degree of battery consumption by accelerating the intermittent period of squelch noise and increasing the level of the return audio signal, and confirming the battery replacement time.

[Brief description of drawings]

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

FIG. 2 is a circuit diagram showing a configuration of a voltage detection circuit in FIG.

3 is a circuit diagram showing a configuration of a voice folding circuit in FIG.

FIG. 4 is a time chart showing the operation of the embodiment of the present invention.

FIG. 5 is a block diagram showing a conventional example.

[Explanation of symbols]

1 transmitter 2 Receiver 3 voice folding circuit 4 squelch circuit 5 Voltage detection circuit 6 batteries 31, 33 buffer 32 variable attenuator 51 Low voltage detection circuit 52 Voltage shift circuit 53 pulse generation circuit 54 switch

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-6-216840 (JP, A) JP-A-5-130025 (JP, A) JP-A-9-181817 (JP, A) JP-A-6- 6441 (JP, A) JP-A-6-303162 (JP, A) JP-A-11-187112 (JP, A) Actual development 4-119147 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04M 1/00 H02J 7/00 H04B 7/26

Claims (6)

(57) [Claims] 1. A transmitter, a transmitter for detecting and activating a voice signal from the transmitter, converting the voice signal into a radio signal and transmitting the radio signal to a partner radio, and a radio signal from the partner radio. Receiving unit for receiving and converting to a voice signal and outputting the voice signal, a receiver for receiving the voice signal output by the receiving unit, and when no radio signal is received, the voice signal output end of the receiving unit is blocked and noise is generated. A squelch circuit that operates so as to release this block when a control signal is input at the same time as not outputting to the handset side, a battery that supplies power to each unit, and a voltage below the reference value that monitors the voltage of the battery. A portable wireless device, comprising: a voltage detection unit that outputs the control signal when 2. A transmitter, a transmitter for detecting and activating a voice signal from the transmitter, converting the voice signal into a radio signal and transmitting the radio signal to a partner radio, and a radio signal from the partner radio. Is received and converted into a voice signal and output, a receiver for receiving the voice signal output by the receiver, and a part of the voice signal from the transmitter is input and adjusted to a predetermined level. Also, a voice folding circuit that sends to the example of the handset when a control signal is input, a battery that supplies power to each unit, a voltage detection that outputs the control signal when the voltage of the battery is monitored and falls below a reference value. And a portable wireless device. 3. A transmitter, a transmitter for detecting and activating a voice signal from the transmitter, converting the voice signal into a radio signal and transmitting the radio signal to a partner radio, and a radio from the partner radio. A receiving unit that receives a signal, converts it into an audio signal and outputs it, a receiver that receives the audio signal output by the receiving unit, and a part of the audio signal from the transmitter, and adjust it to a predetermined level. In addition, when the control signal is input, the voice folding circuit that sends the voice signal to the handset side, and when no radio signal is received, the voice signal output end of the receiving unit is closed so that noise is not output to the handset side. At the same time, when a control signal is input, a squelch circuit that operates to open this blockage, a battery that supplies power to each part, and the voltage of the battery is monitored, and the control signal is output when the voltage falls below a reference value. And a voltage detection unit that A portable wireless device to collect. 4. The voltage detecting section intermittently interrupts the control signal output to the squelch circuit at a predetermined cycle when the voltage of the battery drops to a reference value, and the voltage drop of the battery increases. 4. The portable wireless device according to claim 1, wherein the intermittent cycle is advanced so that the battery is continuously output when the voltage drop of the battery reaches a limit value. 5. The voltage detection unit uses the control signal output to the voice folding circuit as a voltage signal having a predetermined voltage value when the voltage of the battery drops to a reference value, thereby reducing the voltage of the battery. This voltage value increases as it increases, and when the voltage drop of the battery reaches a limit value, this voltage value is output as a predetermined maximum fixed value, and the voice folding circuit inputs the control signal of the voltage signal. 4. The portable radio device according to claim 2, wherein the voice signal is transmitted to the handset side at the same time, and at the same time, the transmission level is controlled to increase in accordance with an increase in the voltage value of the control signal. 6. The portable wireless device according to claim 1, wherein the voltage detection unit includes a switch for forcibly stopping the output of the control signal.