JP2700415B2 - Wireless telephone with individual calling device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a radio telephone with an individual calling device.

[Prior Art] An individual paging device (referred to as a pager, hereinafter referred to as a pager) is a device for receiving an individual paging radio wave.
There is. When the apparatus receives a call signal that matches the individual code (ID code) of the apparatus from the radio waves transmitted from the wireless base station, the apparatus notifies the holder of the reception by the notification unit. Has become.

On the other hand, as a device for transmitting and receiving radio waves for radio telephones, there is a radio telephone (referred to as a cellular telephone; hereinafter, referred to as a cellular telephone). When the apparatus receives a call signal corresponding to its own individual number (telephone number) from the radio wave transmitted from the cellular base station, the apparatus notifies the holder of the reception by the notification means and receives the call signal. The holder who knows the call picks up the handset and talks with the sender.
Conversely, the holder can be the source and dial the destination to talk to the destination via the central office.

[Problems to be Solved by the Invention] By the way, there is a case where one user individually holds the pager and the cellular. For example, pagers and cellular phones are always used in the passenger compartment.
It is not restricted by its shape and weight. When each device is used in such a place, even if there are parts that can be used in common, they must be separately provided.

In addition, since the pager only needs to supply the current intermittently, the current consumption is small, whereas the cellular remains in the ON state, that is, the state of waiting for an incoming call, and the current consumption is large. Therefore, always cellular
In the active state, there is a problem that the battery is greatly consumed, and the talk time cannot be long.

The present invention solves the above-mentioned problems, and incorporates an individual calling device into a radio telephone to achieve integration, and by providing these switching means, some parts are shared to reduce the cost, It is possible to reduce the power consumption without losing the communication means by achieving compactness, and enabling either the individual calling device or the radio telephone to be in a receivable state. When an individual call is received by an individual calling device while it is a device,
It is an object of the present invention to provide a radio telephone with an individual calling device that can switch to a radio telephone and make a telephone call only by operating the switching means.

[Means for Solving the Problems] In order to achieve the above object, the present invention incorporates an individual paging device that receives an individual paging radio wave into a radio telephone that transmits and receives radio telephone radio waves and uses it as an individual paging device. Switching means for selectively switching between a mixer output of an individual calling radio wave and a mixer output of a radio telephone radio wave depending on whether it is used as a radiotelephone or a radiotelephone, and an output of the intermediate frequency amplifier. A detection circuit, and a CPU whose control function is switched in conjunction with the selection of the switching means while being input via the decoder, and at least C
The PU is shared between the individual calling device and the wireless telephone.

[Operation] According to the above configuration, when one of the mixer output of the individual call radio wave and the mixer output of the radio telephone radio wave is selected by the switching means, the control function of the CPU is simultaneously switched in conjunction. Thus, the selected received radio wave is input to the CPU via the intermediate frequency amplifier, the detection circuit, and the decoder, and the CPU functions as an individual calling device or a wireless telephone. Then, it is possible to use such a function that the function as a wireless telephone with high power consumption is turned off and the function as an individual calling device with low power consumption is turned on. In addition, since at least the CPU is shared by the individual calling device and the wireless telephone, the cost is reduced and the device shape is reduced.

[Embodiment] The configuration of an embodiment of a radio telephone with an individual calling device (hereinafter simply referred to as a radio telephone) of the present invention will be described with reference to FIGS. 1 and 2. FIG.

FIG. 1 shows the external configuration of the wireless telephone. It has a transmitter 1 and a push button PB as an input device of a wireless telephone, has a receiver 2 and a display LCD as an output device, and is provided with a transmitting / receiving antenna 3 for transmitting and receiving radio waves for the wireless telephone. . The receiving antenna 4 for receiving the individual calling radio wave is built in the device. Also,
Although not shown, a call speaker 2-1 is also provided.

Next, a circuit configuration incorporated in the apparatus will be described with reference to FIG.

The circuit of the apparatus comprises a cellular circuit 5 and a pager circuit 6. The cellular circuit 5 amplifies and converts a radio wave from the transmitting / receiving antenna 3 and a frequency converting unit 7 (hereinafter, simply referred to as a cellular receiving unit), and an intermediate frequency amplifier that amplifies the output of the cellular receiving unit 7 and outputs the amplified output to the detection circuit 8-1. Frequency amplifier 8
And a decoder 9 for decoding the output of the detection circuit 8-1, a CPU 10 for connecting the push button PB and the display LCD, receiving the output of the decoder 9, and controlling the whole wireless telephone, and a transmitter 1 And a transmitting unit 11 that modulates the voice from the transmitter and outputs it to the transmitting / receiving antenna 3.

On the other hand, the pager circuit 6 includes an individual paging receiver 12 (hereinafter simply referred to as a pager receiver) for amplifying and frequency-converting a radio wave from the receiving antenna 4. In this apparatus, the changeover switch 13 allows the user to select either the cellular receiver 7 incorporated in the cellular circuit 5 or the pager receiver 12 incorporated in the pager circuit 6. In either case, the intermediate frequency output is sent to the intermediate frequency amplifier 8. In the CPU 10, in conjunction with the changeover switch 13, the potential of the function switching input terminal is pulled up or connected to the ground, so that the control function is switched to the selected side of the pager or the cellular. Has become.

The operation when the wireless telephone having the above configuration is used will be described.

When used as a cellular, the changeover switch 13 selects the cellular side. Then, the receiving section is switched to the cellular receiving section 7.
, And the function switching input terminal of the CPU 10 is connected to the ground. In this state, when the transmitting / receiving antenna 3 receives a paging signal corresponding to the telephone number of the device itself from the radio wave transmitted from the cellular base station, the paging signal is transmitted to the cellular receiver 7 at the intermediate frequency. , Amplified by the intermediate frequency amplifier 8, detected by the detection circuit 8-1, further decoded by the decoder 9,
Is input to And the decoded calling signal is CP
It is processed in U9 to generate a ringing tone from the calling speaker 2-1 and to display necessary information on the display LCD. Then, the holder presses the call button on the push button PB, and talks with the sender using the transmitter 1 and the receiver 2.

Here, the voice of the holder through the transmitter 1 is transmitted to the transmitting unit 11.
And transmitted by the transmitting / receiving antenna 3.

Next, the case of using as a pager will be described. When the changeover switch 13 is switched to the pager side, the receiving section is switched to the pager receiving section 12, and the potential of the function switching input terminal of the CPU 10 is pulled up. In this state, when the receiving antenna 4 receives a paging signal that matches the ID code of the apparatus itself from the radio waves transmitted from the wireless base station, the ID code is amplified and frequency-converted by the receiving unit 12. , Is amplified by the intermediate frequency amplifier 8, detected by the detection circuit 8-1, further decoded by the decoder 9, and input to the CPU 10. And the decoded I
The D code is processed by the CPU 10 and displayed on the display LCD, and at the same time, the CPU generates a ringing sound and drives the calling speaker 2-1 to notify the holder that the calling has been made.

When a number code is transmitted following the ID code, the number is displayed on the display LCD. Normally, a telephone number is transmitted as a numeric code. The holder sees this number, switches to the cellular function with the changeover switch 13, and talks to the number on the display LCD. In the case of only notification, similarly, it is sufficient to switch to the cellular function by the changeover switch 13, make a call to the designated contact, and receive the instruction of the other party.

By the way, cellular is always in a functional state,
In contrast to the fact that the power must be turned on, the pager becomes active when the power is turned on intermittently, and furthermore, because of the difference in the frequency and the number of channels of the two receivers, the pager is generally used. Consumes more power than the pager receiver 12. Therefore, by selectively using the cellular and the pager as described above, by turning off the power of the cellular side (cellular receiving unit) and turning on the power of the pager side (pager receiving unit), it is possible to maintain the communication means while maintaining the communication means. Power consumption can be reduced, and the talk time when used as a cellular phone can be extended.

In addition, as described above, when functioning as an individual calling device or a wireless telephone, for example, a circuit element such as a CPU and a notification unit such as a display can be shared by one component.

[Effects of the Invention] As described above, according to the present invention, the individual calling device is incorporated in the wireless telephone, and the function as the individual calling device or the wireless telephone is selected and used by the switching means. With regard to functions, the intermediate frequency amplifier, the detection circuit, the decoder, the CPU, and the like can be shared by one component. For this reason, cost reduction and downsizing of the device shape can be achieved. In addition, in the case of reception only, it is only necessary to use the device as an individual calling device in which current consumption flows intermittently. Can be used to extend the talk time when used as a cellular phone.
Furthermore, it is possible to use both an individual calling device and a radio telephone by simply switching the switching means while being a single device.
The user can make a call to the call number using the same device while watching the call number displayed on the display means only by switching the switching means to the wireless telephone side.

[Brief description of the drawings]

FIG. 1 is a diagram showing the appearance of an embodiment of a radio telephone with an individual calling device according to an embodiment of the present invention, and FIG. 2 is a circuit configuration diagram of the radio telephone with the individual calling device. 7 radio wave receiving section for wireless telephone, 8 intermediate frequency amplifier,
8-1 Detection circuit, 9 Decoder, 10 CPU, 12
…… Individual calling radio wave receiving section, 13 …… Changeover switch.

Claims (1)

(57) [Claims] An individual calling device for receiving an individual call radio wave is incorporated in a radio telephone for transmitting and receiving radio telephone radio waves.
Switching means for selectively switching any one of a mixer output of radio waves for individual calling and a mixer output of radio waves for radiotelephone to input to the intermediate frequency amplifier, depending on whether to use as an individual paging device or as a radio telephone; An output of the intermediate frequency amplifier is input via a detection circuit and a decoder, and a CPU whose control function is switched in conjunction with selection of the switching means is provided.At least the CPU includes an individual calling device and a wireless telephone. A wireless telephone with an individual calling device, wherein the telephone is shared with a user.