JPH01120159A - Portable telephone system - Google Patents

Abstract

PURPOSE:To make a telephone call while putting the main body of the title system in a bag, pocket, etc., by separating a handset part from the main body in the shape of headphones and providing the headphones with an earphone and a microphone. CONSTITUTION:This telephone set consists of a radio equipment part 1 and a stereophonic cassette player part 2 and the headphones as the handset consists of the earphone 201, microphone 202, and a headphone plug 203. When the headphones are used, the plug 203 is inserted into a headphone jack 19 and connected to the radio equipment part 1 and player part 2. when a call signal transmission command is received from a radio base part at the time of termination, a motor driving circuit 18 is stopped and a call signal is sent out if a control part 10 detects the player part 2 in playback operation. Consequently, a telephone call is made while the main body is put in a pocket, etc., and the player part 1 is provided, so stereophonic music, etc., is enjoyed when no telephone call is made.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mobile phone device that is connected to a public switched telephone network and used as a terminal for a public mobile communication system that allows calls to be made while moving.

[Conventional technology]

Conventionally, this type of mobile phone device has a main body and a handset integrated with it, and has only a telephone function.

[Problem that the invention seeks to solve]

Although it is possible to make calls while carrying the conventional mobile phone device described above, it is usually placed in a bag or pocket and taken out when a call is received. Furthermore, even if you do not make a call or a call does not arrive, you must carry it with you, which is not a satisfactory value for carrying.

[Means for solving problems]

The mobile phone device of the present invention is a mobile phone device connected to a public switched telephone network and used as a terminal of a public mobile communication system; a transmitting circuit that outputs a signal, a receiving circuit that receives radio waves from a wireless base station and demodulates an audio signal or a control data signal, supplies a carrier signal to the transmitting circuit, and supplies a local oscillation signal to the receiving circuit. A radio unit equipped with a multi-frequency generation circuit having a synthesizer function, a control circuit for controlling line connection, and an operation/display circuit that has a transmission operation button and various visual displays: A cassette magnetic tape is attached. a cassette holder for reproducing the played stereo audible signal, a magnetic head for reproducing the played stereo audible signal, an amplification circuit for amplifying the reproduced audible signal, a motor drive circuit for rotationally driving the cassette magnetic tape, a stereo audible signal output terminal, and A player section equipped with a headphone jack having audio signal input/output terminals; ear 7 on, and a microphone! :! 7-on and a headphone plug connected to the headphone jack.

Further, when there is an incoming call, the uplink/downlink loop check is performed, a calling signal sending command is received, the operation of the player section is stopped, and the ear 7 of the headphones is stopped.
The configuration is such that a call signal is sent when the phone is turned on, and a call is started by an off-hook operation.

〔Example〕

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

Referring to FIG. 1 showing an embodiment of the present invention, a radio unit 1 includes an antenna 3, an antenna common circuit 4, a transmitting circuit 5, a transmitting low frequency circuit 6, a receiving circuit 7, a receiving low frequency circuit 8,
Multi-frequency generation circuit 9, control circuit 10. and a keyboard display (operation/display circuit) 11. The transmission circuit 5 receives the carrier wave signal from the multi-frequency generation circuit 9 of the frequency synthesizer on a channel designated by the control circuit 10, and transmits the carrier wave signal modulated by the audio signal or control data signal from the low frequency transmission circuit 6. The power is amplified to the required level and supplied to the antenna common circuit 4. An audio signal is inputted to the low frequency transmission circuit 6 from a microphone attached to a headphone through the headphone jack 19, and a control data signal is inputted from the control circuit 10.

The transmitting low frequency circuit 6 supplies these signals to the modulation circuit in the transmitting circuit 5 through a band limiting splatter filter. The receiving/receiving circuit 7 is supplied with a local oscillation signal from the multi-frequency generating circuit 9 and functions as a hetero gain receiver, and receives the demodulated audio signal or control data signal from the receiving low frequency circuit 8.
supply to. The receiving low frequency circuit 8 outputs the received data signal to the control circuit 10 and the audio signal to the headphone jack 19 so as to drive the ear 7 of the headphones. The control circuit 10 has a built-in microprocessor,
Performs line connection control. Keyboard O display 11
has a pushbutton switch for inputting a telephone number, etc., and visually displays the input telephone number, received electric field level, and connection status to inform the operator.

The stereo cassette player section 2 includes stereo reproduction magnetic heads (L, R) 12, 13 . Preamplifier 14° Dolby amplifier 15. Power amplifier 16. Sarge control circuit 17. Motor drive circuit 18. and a headphone jack 19. A motor drive circuit 18 controlled by a servo control circuit 17 rotates the cassette magnetic tape so that it is reproduced and converted into a stereo audible signal by a stereo reproduction magnetic head 12,13. The reproduced stereo audible signal passes through a preamplifier 14 and a Dolby amplifier 15 to suppress noise generated during reproduction, is amplified by a power amplifier 16, and is output to a headphone jack 19 to drive earphones.

The above-mentioned radio unit 1 and stereo cassette player unit 2
The mobile phone device consisting of Figure 2 Prisoner and Figure 2 CB
) has the appearance shown. In Figure 2 Prisoner, 101 is
Playback button switch, 102 is a stop/cassette eject button switch, 103 is a front fast forward button switch, 1
04 is the A-side fast-forward button switch, 105 is the cassette holder, 101m is the lock switch, 107 is the Dolby noise reduction switch, 108 is the volume knob, and 109 is the headphone jack (corresponds to number 19 in Figure 1). , 110 is a display (corresponding to 11 in FIG. 1), 111 is a keyboard (corresponding to 1 in FIG. 1)
1), and 112 are the case. 2nd issue) (Headphones shown are 7 on 20 earphones with 2 left and right earphones)
1, microphone 202, and headphone plug 2
Earphone 201. Microphone 20
It has a structure in which the microphone 202 is fastened near the base of the cord between the earphone 201 and the plug 203.

Next, the incoming and outgoing call operations using this mobile phone device will be explained. When a call arrives (see Figure 3 (A)), when an incoming call signal is received on the incoming call control channel, an incoming call response signal is sent out on the incoming call control channel, the call channel is specified, and the call channel is switched. do. After performing a loop check on up and down lines through this communication channel, it receives a paging signal and a signal transmission command from the radio base station. At this time, if the control circuit 10 detects through the power amplifier that the stereo cassette player is in playback operation, it stops the motor drive circuit 18 and sends out a calling signal. When the start button switch on the keyboard 111, which is an off-call switch, is pressed, a response signal is sent and a call is started.

On the other hand, when making a call (see Figure 3), when you press the start button switch on the keyboard u1 and go off-hook, unless you are a dial lock subscriber and dial lock is in progress, the call control circuit stored in the control circuit 10 Switch to channel. When receiving the idle line signal through this transmission control channel, it transmits a dial tone to the earphone 201 and transmits a calling signal to the wireless base station. If no idle signal is received, it automatically switches to another transmission control channel. Memorize the dial number entered by the operator from the keyboard 111 and send out a calling signal 1 After sending the calling signal, switch to the specified call channel, up and down 9
When it performs a line loop check and receives a dial signal transmission command from the base station, it converts the stored dial number into a dial signal and transmits it. After sending the dialing signal, the call center is connected and the call begins. Note that the standby operation, location registration operation, standby operation during a call, channel switching operation during a call, call end operation, etc. are the same as well-known ones, so description thereof will be omitted here.

〔Effect of the invention〕

As explained above, according to the present invention, the handset and receiver are separated from the main body as headphones, and the headphones are provided with earphones and a microphone, thereby making it possible to talk while the main body is in a bag or pocket. can. Further, by providing a stereo cassette player section, it is possible to enjoy stereo music and the like when not talking on the phone, thereby improving the portability effect.

[Brief explanation of the drawing]

Figure 1 is a circuit configuration diagram showing an embodiment of the present invention, Figures 2 and 2 are external views of a mobile phone device according to the same embodiment, and Figures 3 and 3 are the same. It is a figure explaining operation of an example. 1... Radio device section, 2... Stereo cassette player section, 3... Antenna, 4...
・・Antenna common circuit, 5・・Transmission circuit, 6・
...Low frequency circuit for transmission, 7...Receiver circuit, 8...Low frequency circuit for reception, 9...
Multi-station wave generation circuit, 10... Control circuit, 11...
...Keyboard display, 12.13...
... Stereo reproduction magnetic head, 14 ... Preamplifier, 15 ... Dolby amplifier, 16 ...
... Power amplifier, 17 ... Servo control circuit, 18 ... Motor JK movement circuit, 19 ...
・Headphone jack, 201... Ear 7 on, 202... Microphone, 203...
...Headphones. Agent Patent Attorney Uchihara Sound Edition 2 (A) 3,000 [k (,4)

Claims (2)

[Claims] (1) In a mobile phone device connected to a public switched telephone network and used as a terminal of a public mobile communication system; an antenna sharing circuit and a transmission that outputs a carrier wave signal modulated by an audio signal or a control data signal. a receiving circuit that receives radio waves from a wireless base station and demodulates an audio signal or a control data signal, and a synthesizer function that supplies a carrier signal to the transmitting circuit and a local oscillation signal to the receiving circuit. a radio unit comprising a multi-frequency generation circuit having a cassette magnetic tape, a control circuit for controlling line connection, and an operation/display circuit having a transmission operation button and displaying various visual displays; a cassette holder for mounting a cassette magnetic tape; A magnetic head for reproducing a recorded stereo audible signal, an amplification circuit for amplifying the reproduced audible signal, a motor drive circuit for rotationally driving the cassette magnetic tape, a stereo audible signal output terminal, and an audio signal input/output terminal. A mobile phone device comprising: a player section including a headphone jack; and headphones including an earphone, a microphone, and a headphone plug connected to the headphone jack. (2) When an incoming call is received, an up/down line loop check is performed, a calling signal sending command is received, the operation of the player section is stopped, a calling signal is sent to the earphone of the headphones, and an off-hook operation is performed. 2. The mobile phone device according to claim 1, wherein the mobile phone device initiates a call.