JPH03117933A - Radiotelephone with party call device - Google Patents

Abstract

PURPOSE:To use parts in common and to reduce the power consumption without losing a communication means by incorporating a party call device in a radiotelephone and selecting, and using the function as the party call device or that as the radiotelephone by a switching means. CONSTITUTION:When the mixer output of party calling radio wave or that of a radiotelephone radio wave is selected by a switching means 13, the control function of a CPU 10 is switched in accordance with this selection. The selected reception radio wave is inputted to the CPU 10 through an intermediate frequency amplifier 8, a detecting circuit 8-1, and a decoder 9, and the CPU 10 functions as the party 1 call device or the radiotelephone. The function as the radiotelephone of high power consumption is turned off and the function as the party call device of low power consumption is turned on, and in this state, this device is used. Thus, parts are used in common, and the power consumption is reduced without losing the communicating means.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a radio telephone with an individual paging device.

[Prior Art] An individual paging device (
It is called a pager. There is a pager (hereinafter referred to as a pager). When the heavy equipment receives a call signal that matches its own individual code (ID code) from the radio waves sent from the wireless base station, it notifies the holder of the reception using the notification means. It has become.

On the other hand, as a device for transmitting and receiving radio waves for a wireless telephone, a wireless telephone R (referred to as a cellular device, hereinafter referred to as a cellular device) is used.
There is. This device uses its own individual number (telephone number)
When a calling signal that matches the call signal is received from the radio waves sent from the cellular base station, the notification means notifies the holder of the reception, and the holder picks up the receiver and communicates with the sender. You can now make calls between the two. In addition, conversely, the holder can become the sender and dial the destination, thereby making a telephone conversation with the destination via the telephone office.

[Problems to be Solved by the Invention] By the way, there are cases where two users each hold a pager and a cellular phone. For example, when used constantly in a vehicle, pagers and cellular devices are not limited by their shape or weight. When using each piece of equipment in such a location, each piece of equipment must be installed separately, even if there are parts that can be used in common.

Furthermore, a pager only needs to be supplied with current intermittently, so its current consumption is low, whereas a cellular phone remains energized continuously in the ON state, that is, in the state of waiting for an incoming call, and its current consumption is large. Therefore, if the cellular phone is kept in an active state all the time, there is a problem in that the battery consumption is large and the call time cannot be maintained for a long time.

The present invention solves the above-mentioned problems by incorporating an individual paging device into a radio telephone, and furthermore, it is possible to keep either the individual paging device or the radio telephone in a receivable state. It is an object of the present invention to provide a radio telephone with an individual paging device capable of reducing power consumption without losing communication means.

[Means for Solving the Problems] In order to achieve the above object, the present invention incorporates an individual paging device that receives individual paging radio waves into a radio telephone that transmits and receives radio telephone radio waves, and uses it as an individual paging device. a switching means for selectively switching between a mixer output for individual calling radio waves and a mixer output for radio telephone radio waves and inputting the output to an intermediate frequency amplifier depending on whether the mixer output is for individual calling radio waves or for use as a radio telephone, and the output of the intermediate frequency amplifier; is inputted via a detection circuit and a decoder, and also includes a CPU to which the control 911tffi function is switched in conjunction with the selection of the switching means.

[Function] According to the above configuration, when either the mixer output of individual paging radio waves or the mixer output of radio telephone radio waves is selected by the switching means, the control function of the CPtJ is also switched at the same time. 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 can be used by turning off the function as a radio telephone, which consumes a lot of power, and leaving the function ON as an individual calling device, which consumes little power.

[Example] FIGS. 1 and 2 show the configuration of an example of a wireless telephone R with an individual calling device (hereinafter simply referred to as a wireless telephone) of the present invention.
This will be explained with reference to the figures.

The outer configuration of a radiotelephone is shown in FIG. The wireless telephone has a transmitter 1 and a button PB as input devices, and a receiver 2, a display and a CD as output devices.
A transmitting/receiving antenna 3 for transmitting and receiving radio waves for the wireless telephone is also provided. Note that a receiving antenna 4 for receiving individual calling radio waves is built into the aircraft. Although not shown, a calling speaker 2-1 is also provided.

Next, the circuit configuration built into this device will be explained with reference to FIG. 2.

The circuit of this machine consists of a cellular circuit 5 and a pager circuit 6. The cellular circuit 5 includes a radio wave amplification and frequency conversion unit 7 from the transmitting/receiving antenna 3 (hereinafter simply referred to as a cellular receiving unit), and an intermediate frequency amplifier that amplifies the output of the cellular receiving unit 7 to an intermediate frequency and outputs it to a detection circuit 81. 8, and a decoder 9 that decodes the output of the detection circuit 8-1.
The button PB and the display LCD are connected, and the output of the decoder 9 is inputted to the CPU 10, which controls the entire wireless telephone, and the transmitter 11 which modulates the voice from the transmitter 1 and outputs it to the transmitter/receiver antenna 3. It is made up of.

On the other hand, the pager circuit 6 consists of an individual call receiving section 12 (hereinafter simply referred to as a pager receiving section) that amplifies and frequency converts the radio waves from the receiving antenna 4. , it is possible to select either the cellular receiving section 7 built in the cellular circuit 5 or the pager receiving section 12 built in the pager circuit 6. In either case, the intermediate frequency output is sent to the intermediate frequency amplifier 8. In CPU10,
When the potential of the function switching input terminal is pulled up or connected to the ground in conjunction with the changeover switch 13, the control function is switched to the selected pager or cellular. There is.

The operation of the radio telephone having the above configuration when used will be explained.

When used as a cellular device, the selector switch 13 selects the cellular side. Then, the receiving section becomes the cellular receiving section 7.
The function switching input terminal of the CPUO is connected to the ground. In this state, when the transmitting/receiving antenna 3 receives a paging signal that matches the telephone number of the device itself from among the radio waves sent from the cellular base station, the paging signal is converted into an intermediate frequency signal by the cellular receiving section 7. , is amplified by the intermediate frequency amplifier 8, detected by the detection circuit 81, decoded by the decoder 9, and then
It is input to to. The decoded calling signal is then processed by the CPU 9 to generate a ringing tone from the calling speaker 2-1 and display necessary information on the display LCD. Then, the holder presses the call button on the button PB to make a call with the sender using the transmitter 1 and receiver 2.

Here, the voice of the holder through the transmitter 1 is transmitted to the transmitter 11.
The signal is modulated by the transmitter/receiver antenna 3 and transmitted by the transmitter/receiver antenna 3.

Next, the case of using it as a pager will be explained. 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 CPU10 is pulled up. In this state, when the receiving antenna 4 receives a paging signal that matches the ID code of the device itself from the radio waves sent from the wireless base station, the ID code is amplified and frequency-converted by the receiving section 12. The signal is amplified by the intermediate frequency amplifier 8, detected by the detection circuit 8-1, decoded by the decoder 9, and input to the CPU10. Then, the decoded ID code is processed by CPU10 and displayed on the display LCD, and at the same time, the CPU
generates a ringing tone and drives the calling speaker 2-1 to notify the holder that there is a call.

When a numeric code is sent following the ID code, the numeric code is displayed on the display LCD. Normally, a telephone number is transmitted as a numeric code, so the holder only has to look at this number, switch to the cellular function using the changeover switch 13, and make a call to the number on the display LCD.

Moreover, in the case of only notification, it is sufficient to similarly switch to the cellular function using the changeover switch 13, make a call to a designated contact number, and receive instructions from the other party.

By the way, in order for a cellular device to be active, it must be turned on at all times, whereas a pager becomes active when the power is turned on intermittently, and even has both receivers. Generally, the power consumption of the cellular receiving section 7 is larger than that of the pager receiving section 12 due to the difference in the frequency and number of channels of the cellular side (cellular receiving section). ) by turning off the power and turning on the pager side (pager receiver), you can reduce battery power consumption while maintaining a means of communication, and reduce the talk time when using it as a cellular phone. It can also take a long time.

Further, as described above, when functioning as an individual calling device or a wireless telephone, circuit elements such as a CPU and notification means such as a display can be shared by one component.

[Effects of the Invention] As described above, according to the present invention, the individual paging device is incorporated into a radio telephone, and the function as the individual paging device or the radio telephone is selected and used by the switching means, so that both functions can be used. Regarding functions, an intermediate frequency amplifier, a detection circuit, a decoder, a CPU, etc. can be shared in one part. In addition, when only receiving data, it can be used as an individual calling device that consumes current intermittently, so compared to a wireless telephone that consumes current continuously, battery power consumption can be reduced while maintaining a means of communication. This allows for longer talk times when used as a cellular phone.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the appearance of an embodiment of a radio telephone with an individual paging device according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of the same radio telephone with an individual paging device. 7... Radio telephone radio wave receiving section, 8... Intermediate frequency amplifier, 8-1... Detection circuit, 9... Decoder, 10...
...CPU, 12...Radio wave reception unit for individual calling, 13.
...Choice switch.

Claims (1)

[Claims] (1) An individual paging device that receives radio waves for individual paging is incorporated into a radio telephone that transmits and receives radio waves for radio telephones, and a mixer of radio waves for individual paging is installed depending on whether it is used as an individual paging device or a radio telephone. a switching means for selectively switching between the output and the mixer output of radio telephone radio waves and inputting the output to the intermediate frequency amplifier; 1. A wireless telephone with an individual calling device, comprising a CPU whose control functions are switched in conjunction with selection.