KR930000406Y1 - Device for preventing dischange of mobile telephone - Google Patents

Abstract

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Description

Current Consumption Suppressor for Mobile Phones

1 is a state of use of the portable telephone according to the present invention.

2 is a circuit diagram of a battery consumption suppression apparatus of a portable telephone according to the present invention.

3 is a flowchart showing a processing state of a CPU related to the present invention.

* Explanation of symbols for main parts of the drawings

1 antenna 2 final power amplifier

3: power control oscillator 4: input / output port

5: CPU 6: Keypad

7 amplification circuit 8 switching circuit

TR1, TR2: transistors R1, R2: resistors

The present invention relates to a current consumption suppression device in a portable telephone, which suppresses current consumption by not transmitting an output when the user does not speak during a call.

Conventionally, during the call, the high frequency output is continuously transmitted even when the user does not speak but only listens to the other party. However, in the case of the portable telephone, the current consumption of the transmission circuit is about 10 times larger than the current consumption of the reception circuit. Therefore, the time to use the battery after charging once will be extremely short, and if a large capacity battery is used to eliminate this problem, the volume and capacity of the portable phone will be large.

The present invention has been made to solve the above problems by installing a power supply on / off key on the handle portion of the portable phone when you do not speak yourself during the call to remove the key to suppress the consumption of current The purpose of the present invention is to provide a current consumption suppression device that extends the use time of the battery after a single charge.

In order to achieve the above object, the present invention provides a device for suppressing current consumption of a portable telephone, including a keypad including a power supply on / off key for enabling a user to turn on or off a power supply. CPU (Central Processing Unit) connected to the keypad, the input and output ports connected to the CPU to operate the control of the CPU, switching means consisting of a npn transistor connected to the base of the output terminal of the input and output ports and the emitter is grounded, the switching means Amplification means comprising a pnp transistor having a base connected to a collector of an npn transistor and an emitter connected to a power source, a final power amplifying means connected to a collector of a pnp transistor of the amplifying means and transmitted through an antenna, and the final power amplifying means It is connected to supply the frequency necessary for speech synthesis to the final power amplifying means It characterized by consisting of a voltage-controlled oscillation means.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a use state of the portable telephone according to the present invention, FIG. 2 is a circuit diagram of a battery consumption suppression apparatus of the portable telephone according to the present invention, and FIG. 3 is a flowchart showing a processing state of the CPU related to the present invention. Antenna, 2 is final power amplifier, 3 is Voltage Cont-rolled Oscillator, 4 is input / output port, 5 is CPU (Central Processing Unit), 6 is keypad, 7 is amplifier circuit, 8 is switching circuit TR1 and TR represent transistors, and R1 and R2 represent resistors, respectively.

When entering the call mode and releasing the supply power on / off key of the portable telephone shown in FIG.

According to the present invention, as shown in FIG. 2, a keypad 6, a central processing unit (CPU) 5 connected to the keypad 6, an input / output port 4 connected to the CPU 5, and the input / output port ( 4) a switching circuit 8 comprising a resistor R2 connected to the resistor and a base connected to the resistor, and an emitter connected to a grounded npn transistor TR2, a resistor R1 connected to a collector of the npn transistor TR2 and the A voltage supplying a frequency necessary for speech synthesis to the final power amplifier 9 and the final power amplifier 2 connected to the collector of the pnp transistor TR1 having a base connected to the resistor R1 and an emitter connected to the power supply. It consists of a control oscillator 3 and an antenna 1 connected to the final power amplifier 2.

In the data transmission step on the control channel until the call is made, the CPU 5 drives the input / output port 4 to send a signal of a “high” state to the base to the input / output port 4. As the connected npn transistor TR2 is turned ON and the npn transistor TR2 is turned on, the pnp transistor TR1 is also turned on, and power is applied to the final power amplifier 2 so that transmission is continued.

When the control channel is transferred from the control channel to the voice channel to perform a conversation task, the CPU 5 sets the output of the input / output port 4 to a “low” state, so that the npn transistor TR2 Is turned off and the pnp transistor TR1 is turned off by the turned off npn transistor TR2 so that power is not applied to the final power amplifier 2 so that transmission is not performed.

If the CPU 5 looks at the key on the keypad and the supply power on / off key is not pressed, the output of the input / output port 4 is kept in a low state and if the supply power on / off key is pressed, the input / output Transistors TR1 and TR2 are turned on with the output of the port 4 "high" so that power is applied to the final power amplifier 2 to be transmitted.

In the cellular method, a SAT tone is continuously exchanged between a portable telephone and a cell site during a call to determine whether the cellular phone is in a corresponding cell area to provide a service.

Therefore, if you do not transmit during the exchange, the watch will send a message to the portable telephone to send an audible sound. At this time, the CPU 5 turns on the transistors TR1 and TR2 by making the output of the input / output port 4 "high", and applies electric power to the final power amplifier 2 so that supervisory audible sound is transmitted. Be sure to Then, the CPU 5 again turns the output of the input / output port 4 "low" to the transistors TR1 and TR2 so that power is not applied to the final power amplifier 2 so that transmission is not performed. do.

A method of controlling the output of the input / output port 4 by the CPU 5 as described above with reference to FIG. 3 is as follows.

First, the operation method of the CPU 5 in response to the monitoring audible sound transmission in the call task state is as shown in FIG. 3A. After the CPU 5 causes the output of the input / output port 4 to be " low " (110), and after the base station has searched for a message to transmit a supervised audible sound (120), the supervised audible transmission message has not been delivered. If it is sent to the original call task (150), if the supervised audible transmission message has been delivered, the output of the input and output port 4 is "high" state (130), the supervised audible sound is transmitted (140), the original call Go to the task to repeat the process (150).

In addition, the operation method of the CPU 5 according to the operation of the user's power supply on / off key during a call is as shown in FIG. 3B. The CPU 5 detects whether the power supply on / off key is pressed (200), and if the source on / off key is pressed, causes the output of the input / output port to be "high" (210), and the original user interface. Go to the task (Interface Task) (230), if the supply power on / off key is not pressed, the output of the input and output port is "low" state (220), go back to the original user interface task to perform the process Repeat (230).

The present invention is constructed and operated as described above, unlike conventional portable telephones that consume a lot of current while continuing to transmit, listening stops the transmission only when listening and transmits only when talking, thereby suppressing the current consumption. In mobile phones where large capacity batteries cannot be used due to the weight and weight, it is effective to extend the use time of the charged battery.

Claims (1)

A device for suppressing current consumption of a portable telephone, comprising: a keypad (6) including a power supply on / off key for enabling a user to turn on or off a power supply, and connected to the keypad (6) A central processing unit (CPU) 5, a non-output port 4 connected to the CPU 5 to operate under the control of the CPU 5, and a base connected to an output terminal of the input / output port 4, Is connected to a switching means 8 composed of a grounded npn transistor TR2, a final power amplification means 2 connected to a collector of the npn transistor TR2 of the switching means 7 and transmitted via an antenna, and the final power Current consumption suppression device characterized in that it is connected to the amplification means (2) consisting of a voltage control acquiring means (3) for supplying the final power amplification means (2) required for speech synthesis.