JPS63178643A - Radio telephone system - Google Patents

Abstract

PURPOSE:To realize the display of power application on a radio telephone set with a low cost by using so as to apply power from a 1st power supply to a display means till a 2nd power supply is led after the 1st power supply is led. CONSTITUTION:In turning a switch circuit 28 on, a DC power supply 26 gives a voltage to the emitter 43 of a transistor 42 and a boosting circuit 27 via a switch circuit 28. Thus, a current flows from the emitter 43 to a collector 47 and the current flows a light emitting diode 32. When the output voltage of the boosting circuit 27 is led up to a voltage VUP, a control circuit 15 is operated. The TR 42 is turned off. Thus, no current flows to the light emitting diode 32 and the diode goes off. Thus, after the switch circuit 28 is turned on, the light emitting diode 32 is lightened for a while to display the power application.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a no-Pil telephone device that indicates power-on of a wireless telephone.

(Prior Art) Conventionally, this type of device has been configured as shown in FIG. It is connected.

In the connection device 1, the signal received by the receiving antenna 4 is demodulated by the receiving antenna 5, and the demodulated output of the receiving Ia5 is sent to the control circuit 6 or via the hybrid circuit 7 to the wired line 3.
The signal transmitted from the wired line 3 via the hybrid circuit 7 or the output of the control circuit 6 is modulated by the transmitter 8, and the modulated output of the transmitter 118 is transmitted from the transmitting antenna 9. The synthesizer 10 is a control circuit 6
A carrier signal corresponding to the radio channel indicated by is output to the receiver 5 and the transmitter n8. The received electric field detection circuit 11 determines the electric field strength based on the demodulated output of the receiver 5 and transmits the determination result to the control circuit 6. The identification signal detection circuit 12 verifies the identification signal of the radio telephone 2 included in the demodulated output of the receiver 115, and transmits the verification result to the control circuit 6.

In the radio telephone 2, the signal received by the receiving antenna 13 is demodulated by the receiver 14, the demodulated output of the receiver 14 is transmitted to the control circuit 15 or the receiver 16, and the control circuit 1
5 or the output of the transmitter 17 is modulated by the transmitter 18, and the modulated output of the transmitter 18 is transmitted from the transmitting antenna 19. The synthesizer 20 receives a carrier signal corresponding to a radio channel instructed by the control circuit 15 1) 1
14 and a transmitter 18. Received electric field detection circuit 2
1 determines the electric field strength based on the demodulated output of the receiver 14 and transmits this determination result to the control circuit 15.

The identification signal detection circuit 22 verifies the identification signal of the connection device 1 included in the demodulated output of the receiver 14 and transmits the verification result to the control circuit 15 . The speaker 23 is a sounder that produces a ringing tone when a call arrives.

Incidentally, an AC adapter 25 that converts commercial AClooV into a DC voltage is connected to the rectification stabilization circuit 24 in the connection device 1, and the output of this rectification stabilization circuit 24 is supplied to each circuit. On the other hand, the radio telephone R2 is provided with a DC power supply 26 and a booster circuit 27, and the voltage of the DC power supply 26 is applied to the booster circuit 27 via a switch circuit 28. The DC power supply 26 and the booster circuit 27 output a low voltage and a high voltage to respective circuits via a switch circuit 28. Then, when the switch circuit 28 is turned on,
The control circuit 15 applies the signal "1" to the AND circuit 29, and the timer 30 starts counting a preset time, and after counting, adds the signal "'1" to another preset time AND circuit 29. . Therefore, the AND circuit 29 receives the signal "1" for a while after the switch circuit 28 is turned on.
is added to the driver circuit 31. While this signal "1" is applied, the driver circuit 31 causes current to flow through the light emitting diode 32, causing the diode 32 to emit light. As a result, the light emitting diode 32 emits light for a while after the power is turned on, thereby accepting the power being turned on.

However, only the AND circuit 29. Timer 30. Since the driver circuit 31 is provided, it is extremely inconvenient in terms of simplifying the circuit configuration and reducing costs.

(Problems to be Solved by the Invention) As described above, in the conventional radio telephone device, the AND circuit 29. Timer 30. Since the driver circuit 31 is provided, it is extremely inconvenient in terms of simplifying the circuit configuration and reducing costs.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a wireless telephone device that can display power-on of a wireless telephone with a simple circuit configuration and at low cost.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a wireless telephone with at least a first power source and a second power source, and when the first and second power sources are turned on, the first power source is turned off. In a radio telephone device that starts up first and starts up after a second power source is turned on, a display means for displaying power on, and a period from when the first power source is turned on until the second power source is turned on; A driver means for supplying power from the first power source to the display means is characterized.

(Function) According to the present invention, power is supplied from the first power source to the display means by the driver means from the time when the first power source is turned on until the second power source is turned on, and during this power supply. The display means indicates that the power has been turned on.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of a radio telephone to which a radio telephone device according to the present invention is applied.

In this figure, parts that perform the same functions as those of the wireless telephone of the apparatus shown in FIG. 3 are given the same reference numerals for convenience of explanation. In this embodiment, the device shown in FIG. In place of the AND circuit 29° timer 30 and driver circuit 31 in the telephone f12, only a driver circuit 41 is provided, and the emitter 43 of the transistor 42 in this driver circuit 41 is connected to the DC power supply 26 via the switch circuit 28, A base 44 of the transistor 42 is connected to a booster circuit 27 via a resistor 45 and a resistor 46, and a collector 47 of the transistor 42 is grounded via a light emitting diode 32. Transistor 42 is turned off when a predetermined voltage is applied to base 44, and turned on otherwise. The booster circuit 27 outputs a high voltage for operating the control circuit 15 and each circuit, and the DC power supply 26 outputs a low voltage for operating the other circuits.

Now, when the switch circuit 28 is turned on, the DC power supply 26
applies a voltage to the booster circuit 27 and the emitter 43 of the transistor 42 via the switch circuit 28. At this time,
The output voltage of the booster circuit 27 has not yet risen, so the control circuit 15 does not operate. Therefore, the transistor 42 is turned on with no voltage applied to the base 44, and current flows from the emitter 43 to the collector 47, and this current also flows to the light emitting diode 32. Here, when the DC power supply 26 rises to the voltage VCC as shown in FIG. 2(a), the light emitting diode 32 lights up at time t1 as shown in FIG. 2(b).

Thereafter, when the output voltage of the promotion circuit 27 rises to the voltage Vup as shown in FIG. 2(a), the control circuit 15 is activated. At the same time, the booster circuit 27 has a resistor 4 connected to the base 44.
Apply voltage via 6.45. Here, the voltage applied to the base 44 of transistor 42 reaches the predetermined voltage and transistor 42 is turned off. Therefore, no current flows through the light emitting diode 32, and this diode 32
The light is dimmed at time t2 as shown in FIG. 2(b). Therefore, after the switch circuit 28 is turned on, the light emitting diode 32 will be lit for a while, and it is possible to indicate that the power is turned on. As described above, in this embodiment, the simple circuit configuration of only the driver circuit 41 and the light emitting diode 32 can indicate that the power is turned on for a while. In addition,
In order to indicate that the power is turned on, not only a light emitting diode but also a liquid crystal display, a speaker that emits a notification sound, etc. may be used.

By the way, the control circuit 15 is connected to the base 4 of the transistor 42.
By lowering the voltage applied to 4! - By turning on the transistor 42 and passing current through the light emitting diode 32, the diode 32 can be turned on as appropriate.

〔Effect of the invention〕

As explained above, according to the present invention, the driver means supplies power from the first power source to the display means from the time when the first power source is turned on until the second power source is turned on. Since power-on is displayed by the display means during power supply, it is possible to provide a radio telephone device that can display power-on of the radio telephone with a simple circuit configuration and at low cost.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a wireless telephone to which the wireless telephone device according to the present invention is applied, and FIG. Graph showing the rise characteristics of the DC power supply and booster circuit in the telephone box, figure (b)
1 is a graph showing the lighting timing of the light emitting diode in the embodiment shown in FIG. 1, and FIG. 3 is a block diagram showing a conventional wireless telephone device. DESCRIPTION OF SYMBOLS 1... Connection device, 2... Wireless telephone, 3... Wired line, 4.13... Receiving antenna, 5.14... Receiver, 6.15... Control circuit, 7. ...Hybrid circuit, 8.18...Transmitter, 9,19...Transmission antenna, 1-0.20...Synthesizer, 11.21.
... Received electric field detection circuit, 12.22... Identification signal detection circuit, 16... Receiver, 17... Transmitter, 23...
・Speaker, 24... Rectification stabilization circuit, 25...A
C adapter, 26... DC power supply, 27... Boost circuit, 28... Switch circuit, 29... AND circuit, 3
0...Timer, 31.41...Driver circuit, 32
...Light emitting diode, 42...Transistor, 45
．． 46...Resistance. Figure 1 Figure 2

Claims (1)

[Claims] A wireless telephone is connected to the connecting device via a wireless line, and the wireless telephone is provided with at least a first power source and a second power source, and when the first and second power sources are turned on, the first power source In a wireless telephone device in which a power source is turned on first and a second power source is turned on later, the wireless telephone device includes: a display means for displaying power on; and driver means for supplying power from the first power source to the display means.