JP4893342B2 - Portable radio and charger - Google Patents

Description

  The present invention relates to a portable wireless device and a battery charger thereof, and more particularly to a wireless device and a charger having a function of correcting an oscillation frequency of a local oscillator of a portable wireless device.

  In recent years, land mobile radio (LMR) for commercial use has been reduced in frequency band per channel and digitized from the viewpoint of frequency utilization efficiency. When digitizing, frequency division multiplexing using frequency modulation keying (FSK) of FM modulation because of coexistence with existing analog wireless communication devices, diversion of existing equipment, ease of control, etc. (Frequency Division Multiple Access (FDMA)) or phase shift keying (PSK) that changes the phase is often employed. Examples of the frequency modulation means and the phase modulation means include a voltage controlled oscillator (VCO), a temperature compensated crystal oscillator using a crystal oscillator as a frequency oscillation source (Temperature Compensated Crystal Oscillator), and a crystal as X'tal. This is sometimes referred to as TCXO), and the frequency control signal of a voltage-controlled temperature compensated crystal oscillator (VC-TCXO) is superposed on the frequency control signal to be transmitted, thereby superimposing the frequency to be transmitted. Deviation and phase deviation are given.

In addition, the radio receiver may adopt a superheterodyne method that detects the data superimposed on the carrier wave signal after converting the received high-frequency signal to a lower intermediate frequency signal and amplifying it to a sufficient level. Many have a local oscillator for this purpose. Furthermore, in a radio device having a transmission function and a reception function, it is common that an oscillator as a transmission radio wave generation source and a local oscillator for reception are shared by one oscillator.
Further, when a plurality of communication channels are switched and used, voltage control means 81 that generates a frequency control signal by a microcomputer (abbreviated as a microcomputer), a DA converter, or the like, for example, as a portable radio 80 shown in FIG. In general, a VC-TCXO 82 that controls the oscillation frequency by the control signal and a transmission / reception circuit (TRX) 83 that performs transmission processing and reception processing based on the generated reference frequency signal are provided. The voltage control means 81 and the VC-TCXO 82 include a phase locked loop (PLL) circuit having a frequency switching function, and a PLL having a variable frequency divider in the loop so that the oscillation frequency can be switched. Often uses a synthesizer.

On the other hand, as described above, crystal oscillators with excellent frequency stability are used for these reference oscillators, but the frequency may vary little by little over time during long-term use. It is necessary to check and adjust the frequency. In these frequency checks, as shown in FIG. 9, it is necessary to supply the transmission output signal of the portable radio 80 to equipment 84 such as a frequency counter via a coaxial cable 85 and measure the frequency.
Further, Patent Document 1 is known as a frequency correction means in the current communication method in which the narrow band and the digitization as described above are progressing. This relates to frequency control means that responds to aging of crystal oscillators, and extracts frequency errors contained in baseband signals obtained by receiving and detecting radio waves transmitted from base stations that have been frequency controlled with high accuracy. Based on the error information, the frequency control signal of the VCXO of the PLL oscillation circuit is corrected, and the frequency control signal information is stored in memory for subsequent frequency control. Note that the frequency error information included in the received detection signal is not limited to this example. For example, when detecting a known frame synchronization word included in the received detection signal, data of a frame synchronization word candidate and a known If a deviation from the frame synchronization word data is detected, frequency error information can be obtained.
JP 2001-186205 A

  However, in the conventional frequency adjustment method as shown in FIG. 9 described above, not only an expensive device such as a frequency counter is required, but a measuring instrument is provided like a maintenance center, and it has specialized knowledge. Since it was necessary to carry out the adjustment after bringing the equipment to be adjusted into a place where maintenance personnel existed, it took time and effort. Also, in regular maintenance, even if frequency fluctuations that do not result in incommunicable state occur during the interval period, the operator often uses it without noticing, but as a result, the substantial communication quality is reduced. It will be used in a lowered state. In other words, as the bandwidth becomes narrower, even a slight frequency shift will substantially reduce the reception sensitivity. Therefore, even in a sufficiently high incoming field strength environment, operation with a reduced communication quality is required. It was forced.

In addition, as an oscillator with extremely high frequency stability, there is an oscillator (OCXO) that contains TCXO in a thermostatic container (tank) that keeps the internal temperature constant. In order to keep constant at a high temperature, a considerable amount of electric power is required and the shape is large, so it is not suitable for incorporation into a portable wireless device. Further, in a system in which a control channel signal whose frequency is controlled and managed with high accuracy is constantly transmitted from a base station, such as a mobile phone system, a method of synchronizing the frequency of a PLL transmission circuit built in a portable radio device with these signal frequencies However, in addition to the disadvantage that the circuit configuration becomes complicated, in LMR there are many systems that do not have a control channel that is always transmitted, and therefore cannot always be adopted.
The present invention has been made in view of these circumstances, and in a situation where a wireless device is used every day, the frequency of the reference signal generation source is automatically or manually without imposing any burden on the operator. It is an object of the present invention to provide a portable wireless device and a charger that can accurately set the battery.

In order to solve this problem , the present invention provides a charger for charging a battery in a portable radio device including at least local oscillation means as a high-frequency signal generation source of a transmission unit or a reception unit and a battery. placing置又is a charging detecting means for detecting the connection of a reference signal receiving means for receiving a reference signal outputted from the built-in or added to the reference signal generating means to said charger, a frequency of said received reference signal And a local oscillation frequency correction means for matching or approximating the output frequency of the local oscillation means, and when the charge detection means detects that the portable wireless device is mounted or connected to the charger. The local oscillation frequency correcting means is operated .
The present invention has a charge detection unit, battery voltage detecting means for detecting an increase in the battery voltage, the charging voltage detecting means for detecting the presence or absence of the voltage applied to the battery charging terminal, a magnetic member added to the charger proximity detection means to be either of the charge switch means is energized when worn in the recess of the charger and, when said portable radio detects that is being charged by said charge detection means It is characterized by comprising means for automatically starting the local oscillation frequency correcting means or manual operation switch means for starting the local oscillation frequency correcting means.

The present invention has a local oscillation frequency correction means, said local oscillator means output signal, or by one or multiplication or division of both the reference signal received from the charger, to match both the frequency range A multiplication / division means is provided.
The present invention has a local oscillation frequency correction means, the local oscillation frequency correction means, the frequency or phase of the output signal of the voltage controlled oscillator having as the reference signal and the local oscillation means for obtaining from the charger Phase comparison means for comparing and generating a signal corresponding to the difference between them, loop filter means for extracting a DC component from the output of the phase comparison means, and supplying the loop filter output as a frequency control signal for the voltage controlled oscillator And a frequency control voltage information memory means for storing frequency control signal information of the loop filter output in a state in which the phase lock loop is synchronized.

The present invention also includes at least a local oscillation means as a high-frequency signal generation source of a transmission section or a reception section and a battery, and a charge detection means for detecting that the battery is mounted or connected when charging the battery. A reference signal receiving means for receiving a reference signal for correcting the oscillation frequency of the local oscillating means, and a local oscillation frequency correcting means for making the oscillation frequency of the local oscillating means coincide with or approximate to the frequency of the received reference signal. comprises said charge detection means,置又mounting on the charger to a portable radio apparatus for operating the local oscillation frequency correction means when it is detected that they are connected in a charger for charging, battery a charging circuit for generating a charging power, a reference signal onset for generating a group No. Junshin for correcting the oscillation frequency of said local oscillation means of the mobile radio device It is characterized in that a means.
Further, the present invention is characterized in that the reference signal generating means is a thermostatic chamber type crystal oscillator (OCXO).
The present invention is a group No. Junshin from the reference signal generating means means for transmitting to the portable wireless device, a weak radio signal generating means, means for transmitting superimposed on the charging current, a DC blocking element to the charging terminal It is characterized in that it is either a means for supplying via a reference signal or a means for supplying via a reference signal dedicated terminal.

As described above, according to the present invention, an oscillator having excellent frequency stability such as OCXO is built in the charger, and when the battery built in the portable radio is charged, the OCXO transmission signal is transmitted from the charger to the portable radio. Since it is configured to control the local oscillator of the portable radio so that there is no error between the frequency and the frequency of the output signal of the local oscillator as the high-frequency signal generation source built in the portable radio. The local oscillator output of the portable wireless device can be corrected automatically without any burden on the operator or manually as necessary, so that the oscillation frequency can always be kept accurate.
In portable radio according to the immediate Chi, invention, a charge detection unit that置又mounting the charger detects that it is connected, a reference signal receiving means for receiving a reference signal sent from the charger, received reference And local oscillation frequency correction means for matching or approximating the output frequency of the local oscillation means to the signal frequency, so that a simple function can be added to the existing configuration without the need for a particularly expensive circuit or device. It is possible to make the frequency of the oscillator built in the portable wireless device coincide with the reference frequency signal transmitted from the charger.

Further, according to the present invention, as the charge detection means, a battery voltage detection means for detecting an increase in battery voltage, a charge voltage detection means for detecting presence or absence of an applied voltage to the battery charging terminal, and a magnetic element added to the charger Adopting the proximity detection means to the member, the charging switch means that is energized when mounted in the recess of the charger, and automatically detecting when the portable radio is being charged by the charging detection means Alternatively, since the local oscillation frequency correction means is manually activated, it is possible to select whether the local oscillation frequency correction means is activated automatically or manually in accordance with the charging environment. Therefore, when frequency correction processing is not preferable as in the case where there is an interference radio wave that approximates the reference signal frequency, it is possible to prevent synchronization with an incorrect frequency by not starting the local oscillation frequency correction means. it can.
Further, according to the present invention, the local oscillation frequency correcting means multiplies or divides one or both of the local transmission means output signal and the reference signal received from the charger, thereby matching the frequency ranges of both. Since the multiplication / frequency division means is provided, the portable wireless device and the charger according to the present invention can be implemented with a simple configuration. Furthermore, even when a single charger is shared by a plurality of portable wireless devices having different reference frequencies, the combination of the portable wireless device and the charger can be freely performed as long as the frequency relationship is constant. .

Further, according to the present invention, the local oscillation frequency correction means includes a PLL circuit configured to synchronize an output signal of the local oscillation means (voltage controlled oscillator) of the portable wireless device with a reference signal acquired from a charger, Since the loop filter output (frequency control signal information) in a state in which the PLL circuit is synchronized is configured to be stored in the frequency control voltage information memory means, even after charging is completed, based on the stored frequency control signal information, An accurate local oscillation frequency signal can be obtained.
In addition, according to the present invention, the charging circuit for generating charging power in the battery and the reference signal generating means for generating the reference frequency signal for correcting the oscillation frequency of the local oscillating means of the portable wireless device are provided. When charging the battery built in the portable wireless device according to any one of Items 1 to 4, an accurate reference frequency signal can be supplied.

Further, according to the present invention, since the thermostatic chamber type crystal oscillator (OCXO) is adopted as the reference signal generating means, a charger having an accurate reference frequency signal generating source can be realized relatively easily.
Further, according to the present invention, the means for transmitting the reference frequency signal from the reference signal generating means to the portable wireless device includes the weak wireless signal generating means, the means for sending the signal superimposed on the charging current, and the DC cut element at the charging terminal. The means for supplying via the reference signal and the means for supplying via the reference signal dedicated terminal provide a wide range of configuration options in realizing the charger. Further, if a plurality of these means are provided and can be appropriately selected, it is possible to select an optimum means according to the environment to be used.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the components, types, combinations, shapes, relative arrangements, and the like described in this embodiment are merely illustrative examples and not intended to limit the scope of the present invention only unless otherwise specified. . In the example described below, the local oscillator output of the portable wireless device is described as a reference signal. However, in a scene where the frequency of the signal is emphasized, it may be expressed as “reference frequency signal” or “reference signal frequency”. Both refer to the same thing.
FIG. 1 is a schematic external view showing an embodiment of a portable wireless device 1 and a charger 2 according to the present invention. In this example, the portable wireless device 1 has a battery 4 fitted in the back side of the wireless device housing 3 by a slide mechanism or a fitting mechanism, and the channel switching switch 5 and the antenna 6 on the upper surface of the housing. In addition, a transmission press / talk switch (PTT) 7 is added. In addition, the charger 2 is provided with a recess 8 for inserting the portable wireless device 1 on the upper surface of the charger housing, and a charging terminal at the bottom of the portable wireless device 1 is provided at the bottom thereof, or as necessary. Terminals corresponding to the signal transmission terminals provided accordingly are provided, and AC outlets, power switches, display LEDs, other switches, etc., not shown, are provided.

  FIG. 2 is a schematic block diagram showing a configuration example of the portable wireless device 1 and the charger 2 according to the present invention. The portable wireless device 1 shown in this example is a transmitter / receiver (TRX) 10 for functioning as a wireless device, a frequency correction control unit 11, and a local oscillator that generates a high-frequency signal for a reference signal inside the portable wireless device. A VC-TCXO (voltage control type temperature compensation crystal oscillator) 12 and the battery 4 described above are provided. Since other blocks that should normally be provided as a portable wireless device are not directly related to the present invention, illustration and description thereof are omitted. In addition, the charger 2 includes a circuit that converts AC power supplied from an AC power source into DC current and supplies it to a battery 4 built in the portable wireless device 1 as a charging circuit 13 that is the minimum required as a charger. However, as a block related to the present invention, an OCXO (constant temperature chamber type crystal oscillator) 14 is provided as a reference signal generating means.

  In the present invention, when the portable wireless device 1 is mounted on the charger 2 and charged by such a configuration, the local oscillation signal frequency of the portable wireless device 1 (reference of the portable wireless device) is obtained from the OCXO 14 provided in the charger 2. Signal). The portable radio device 1 receives the reference frequency signal transmitted from the charger via the antenna 6, compares it with the output signal frequency of the internal local oscillator, and supplies frequency error information of both to the frequency correction control unit 11. To do. The frequency correction control unit 11 controls the VC-TCXO 12 so that it is ideally zero so that this frequency error is minimized. It should be noted that the OCXO2 is set to the minimum necessary level within a range that does not exceed a weakly permitted ring strength within a legally allowable range, for example, “electric field strength of 35 μV / m or less at a distance of 3 m” in domestic regulations.

According to this processing, it is possible to obtain a local oscillation frequency that matches the extremely accurate signal frequency of the OCXO 14. Information on the frequency control signal obtained as a result is stored in a memory (not shown) provided in the TRX 10 or the frequency correction control unit 11, and even after charging is completed, local oscillation of an accurate frequency is performed based on the stored information. Output can be obtained. In addition, detecting that the portable wireless device 1 is mounted in the recessed portion 8 of the charger 2 and performing frequency comparison processing, frequency correction processing, frequency information storage, and the like based on the detection signal prevent malfunctions. Would be preferred above. Various charging detection means are conceivable for this purpose. For example, since the charging supply voltage is higher than the normal battery voltage, it may be a battery voltage detection means for detecting the rise. . Usually, in the charging process, a battery voltage is monitored, a process for calculating an integrated amount of charging current, and the like are performed so as not to overcharge, and the process may be used for monitoring the battery voltage. Alternatively, when it is difficult to monitor the battery voltage itself, a charging voltage detecting means for detecting the presence or absence of the voltage applied to the battery charging terminal may be used.
Furthermore, a magnetic piece is added to an appropriate position of the recessed portion 8 of the charger 2, and a reed switch that reacts with the magnet is built in a predetermined position of the portable wireless device 1 so as to face the magnet piece. It may be. Alternatively, charging switch means is provided such that a switch added to the bottom of the portable wireless device 1 is energized by a convex portion provided at the bottom of the recessed portion 8 of the charger, and charging is performed by these charging detection means. If this is detected, the local oscillation frequency correction means may be automatically activated.

When there is an interference wave or a strong noise signal that is the same as or close to the reference frequency signal transmitted from the charger as a use environment, there is a possibility that the reference signal cannot be transmitted wirelessly. In that case, it may not be preferable to automatically activate the local oscillation frequency correction means when it is detected by the charge detection means described above that the portable wireless device is being charged. It would be preferable to provide a manual operation switch to be used and to use a means for manually starting the frequency correction means if necessary.
According to the present invention, since the portable wireless device is frequently charged, the portable wireless device is matched with the accurate reference frequency signal each time. Therefore, it is possible to always realize the portable wireless device having the accurate reference frequency signal. It becomes. Therefore, as in the prior art, there is an extremely great effect in preventing a reduction in reception sensitivity due to a frequency shift and a frequency shift of transmission radio waves.

In the embodiment described above, an example in which the reference signal is supplied from the charger 2 to the portable wireless device 1 via the antenna 6 of the portable wireless device 1 is shown. However, the present invention is not limited to this example, and various modifications are possible. Is possible.
That is, FIG. 3 is a conceptual diagram showing a first modified embodiment. In this example, the OCXO 14 built in the charger 2 is housed in an independent housing. According to this configuration, for example, a reference signal is supplied from a single OCXO to a plurality of charging wireless devices. Would be convenient to.
FIG. 4 is a conceptual diagram showing still another modified embodiment. In this example, as described above, the portable radio device 1 is connected to the built-in OCXO 14 of the charger 2 via the dedicated terminal 16 for transmitting the reference frequency signal so as to cope with a case where a strong disturbance wave or the like exists outside. It is configured to transmit to the transmission / reception unit 10. For this purpose, it is necessary to provide signal terminals on the portable wireless device 1 and the charger 2.
FIG. 5 is a conceptual diagram showing still another modified embodiment. In this example, a charging terminal is used instead of the reference frequency signal dedicated terminal. That is, although the charging current may include a slight AC component, it is basically a direct current, so that no inconvenience occurs even if a reference frequency signal, which is a high-frequency signal, is applied to the charging terminal. Therefore, as shown in FIG. 5, the output signal of the OCXO 14 is applied to the charging terminal 17 via the DC signal blocking capacitor C1, and on the portable radio device 1 side, the reference frequency signal is transmitted via the capacitor C2. To supply. According to this method, there is no need to provide an extra terminal, which is economical.
It should be noted that if a configuration in which a plurality of means described above are used together and any one of the means can be selected as necessary, it will become even more functional.

FIG. 6 is a block diagram showing an example of the internal configuration of the portable wireless device 1 of the present invention. In this example, an example of correcting the local oscillator output signal of the portable wireless device 1 based on the reference frequency signal supplied from the reference signal generating means (OCXO) of the charger 2 will be described. The case where a PLL circuit is used as a local oscillator is shown. Usually, since a PLL synthesizer circuit is often used as a high-frequency signal generation source or a clock signal generation source, it can be realized at low cost by using them.
In FIG. 6, 6, 10 and 11 are the antenna, the transmission / reception unit, and the frequency correction control unit of the portable wireless device 1 as already described, and the other blocks are partially changed to implement the present invention. This is a PLL oscillation circuit. That is, a block 20 surrounded by a broken line is a reference signal receiving unit (reference signal receiving means) that receives a reference frequency signal supplied from the OCXO 14 or the like of the charger 2 described above, and internally includes an antenna 21 and a high-frequency amplifier circuit. 22 and a band pass filter (BPF) 23. This configuration is almost the same as the high-frequency block of a normal receiving unit, and as described with reference to FIGS. 2 to 5, uses the receiving high-frequency unit block of the transmitting / receiving unit 10 of the portable wireless device 1. May be. The block surrounded by the other broken line 30 is a local oscillation unit used as a reference signal generation source of the transmission / reception circuit 10, and in this example, the VC-TCXO 31 and its frequency control information (frequency control voltage information) are stored. A memory (MEM) 32 is included. The reference signal receiving unit 20, the local oscillation unit 30, the phase comparator (PD) 40, the loop filter (or low-pass filter LPF) 50, and the frequency divider (DIV) 60 constitute a PLL circuit. . That is, the frequency difference or phase difference between the output signal frequency of the reference signal receiving unit 20 and the output signal frequency of the local oscillating unit 30 is detected by the phase comparator (PD) 40, and a DC signal corresponding to the difference is detected. While extracting by the loop filter (or low-pass filter LPF) 50, the DC signal is supplied as a frequency control signal of VC-TCXO. The frequency divider (DIV) 60 is a variable frequency divider, and is configured to obtain a required oscillation frequency from the VC-TCXO 31 by changing the frequency division ratio. The memory (MEM) 32 of the local oscillation unit 30 is supplied with a control signal from the transmission / reception unit 10 or the frequency correction control unit 11, and the control voltage information such that a necessary oscillation frequency is output from the VC-TCXO 31 is stored in the memory. It is assumed that

  In this configuration, when the portable wireless device 1 is mounted in the recessed portion of the charger 2 and is detected to be charging by a charge detection means (not shown), the reference frequency signal from the OCXO of the charger 2 is obtained. The PLL circuit operates using the received signal frequency as a reference signal, and finally enters the locked state when the oscillation frequency of the VC-TCXO 31 coincides with the phase of the frequency signal of the OCXO of the charger. The frequency relationship at that time is a value determined by the frequency division ratio of the frequency divider (DEV) 60, but the stability of the frequency coincides (synchronizes) with that of the reference frequency signal, so it is set to an extremely accurate frequency. Is done. And the frequency control voltage information in a synchronous state is memorize | stored in the memory 32, and is used as a frequency control signal generation source of subsequent VC-TCXO31. According to this configuration, it is possible to obtain a local oscillator output accurately corrected by a reference frequency signal such as OCXO built in or added to the charger.

  FIG. 7 is a block diagram showing still another modified embodiment. In this example, in a normal transmission / reception operation, a VCO 70 that can be changed in a wide frequency range is used as a compared oscillator instead of the VC-TCXO 31. The local oscillation unit 30 described with reference to FIG. 6 is used as a reference signal source to operate as a PLL oscillation circuit. As shown in FIG. 7, the reference signal source (outputs of the local oscillator 30 and the reference signal receiver 20) of the PLL circuit and the oscillator to be compared (VCO 70 and local oscillator) are switched by, for example, three changeover switches SW1, SW2, and SW3. The PLL circuit is operated by replacing the unit 30). That is, as shown in FIG. 7, the state in which each switch SW1 to SW3 is connected to the terminal a is a normal transmission / reception operation state, the reference signal of the PLL oscillator is the output of the local oscillation unit 20, and the compared oscillator is the VCO 70. On the other hand, when the b terminal is selected as each switch terminal, the reference signal of the PLL oscillator becomes the output of the reference signal receiving unit 20, that is, the reference frequency signal supplied from the OCXO of the charger, and the compared oscillator Becomes the local oscillation unit 30. According to this configuration, it is possible to configure a PLL oscillation circuit using a VCO, which is advantageous when a wide frequency range is variable or a large deviation is required.

Note that the frequency correction means is not limited to this example, and is based on error information between the reference frequency signal supplied from the OCXO of the charger and the local oscillator output signal of the portable radio by digital processing. The local oscillator (reference oscillator) of the portable radio device may be controlled so that the difference becomes as small as possible. In particular, since many digital wireless systems have been adopted in recent years, many portable wireless devices equipped with a CPU, various memories, DSPs, etc. for digital signal processing are widely used. In addition, no special circuitry would be required other than requiring a high stability oscillator such as OCXO.
The invention “Communication device, mobile telephone device, oscillation signal generation device, communication method and oscillation signal generation method” of the same applicant shown in Patent Document 1 discloses frequency correction means adapted to the digital modulation method. Therefore, it will be useful for reference in practicing the present invention.

  Needless to say, the present invention can be variously modified without being limited to the above-described embodiments. For example, the portable wireless device can be applied to a portable wireless device having only a reception function in addition to a device having a transmission / reception function. Furthermore, although it is applicable also to what has only a transmission function, the simple reception function which receives the reference frequency signal transmitted from a charger in that case is required. In addition to the OCXO, the reference frequency signal source is a radio clock signal, a radio wave from an artificial satellite, or a radio signal whose frequency is accurately controlled, or a clock signal supplied via another network. It can also be used. In that case, it is only necessary to incorporate a block for receiving each radio wave into the charger, and to incorporate a plurality of receiving means that can be used as these reference frequency signals, and to be able to use those that can be appropriately selected and used. Would also be useful.

Also, as a method for charging a battery by connecting a portable wireless device to the charger, in addition to inserting the portable wireless device into the recessed portion of the charger housing, a coaxial type charging power supply attached to the portable wireless device There is also a type in which the plug at the end of the cable extending from the charger is inserted into the terminal for charging, but in such a case, as described with reference to FIGS. If a method of transmitting a signal or a method of superposing a reference frequency signal on a charging terminal is used, the present invention can be similarly implemented. Further, as the charge detection means at that time, a means for detecting the presence / absence of voltage application to the charging terminal of the portable wireless device or a means for detecting an increase in battery voltage may be used.
Furthermore, if processing portions necessary for implementing the present invention are realized as a program, it may be realized in software by installing in a wireless device having a CPU and a memory.

1 is a schematic external view showing an example of a state where a portable wireless device according to the present invention is attached to a charger. 1 is a schematic block diagram illustrating a circuit configuration example of a portable wireless device and a charger according to the present invention. The general | schematic block diagram which shows the deformation | transformation Example of the portable radio apparatus and charger which concern on this invention. The general | schematic block diagram which shows the deformation | transformation Example of the portable radio apparatus and charger which concern on this invention. The general | schematic block diagram which shows the deformation | transformation Example of the portable radio apparatus and charger which concern on this invention. The schematic block diagram which shows the other Example of a portable radio | wireless machine which concerns on this invention. The schematic block diagram which shows the other Example of a portable radio | wireless machine which concerns on this invention. FIG. 6 is a schematic block diagram illustrating a configuration example of a conventional portable wireless device. The conceptual diagram which shows the frequency adjustment method of the local oscillator of the conventional portable radio | wireless machine.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Portable wireless device, 2 charger, 3 portable wireless device housing, 4 battery, 5 channel changeover switch, 6, 15, 21 antenna, 7 PTT switch, 8 recessed part of charger, 10 transmission / reception part (TRX), 11 Frequency correction control unit, 12, 31 VC-TCXO, 13 charging circuit, 14 reference signal generating means (OCXO), 16 reference frequency signal dedicated terminal, 17 charging terminal, 20 reference signal receiving unit, 22 high frequency amplification unit, 23 band Pass filter, 30 reference signal source (local oscillator), 32 memory (MEM), 40 phase comparator (PD), 50 loop filter (LPF), 60 frequency divider (DEV), 70 VCO, SW1, SW2, SW3 Selector switch

Claims (7)

In a portable wireless device incorporating at least local oscillation means and a battery as a high-frequency signal generation source of a transmission unit or a reception unit,
Charge detecting means for detecting that the battery is placed or connected to a charger when charging the battery;
A reference signal receiving means for receiving a reference signal outputted from the built-in or added to the reference signal generating means to said charger,
And the local oscillation frequency correction means for matching or approximating the output frequency of said local oscillation means to the frequency of said received reference signal, comprising a,
A portable wireless device that operates the local oscillation frequency correcting unit when the charge detection unit detects that the portable wireless device is mounted or connected to the charger . The charge detection unit, battery voltage detecting means for detecting an increase in the battery voltage, the charging voltage detecting means for detecting the presence or absence of the voltage applied to the battery charging terminal, proximity detection means to the added magnetic member to said charger is either charging switch means is energized when worn in the recess of the charger, and automatically the local time in which the portable radio detects that it is being charged by said charging detecting means 2. The portable wireless device according to claim 1, further comprising means for starting oscillation frequency correction means or manual operation switch means for starting said local oscillation frequency correction means. The local oscillation frequency correction means, said local oscillator means output signal, or by one or multiplication or division of both the reference signal received from the charger, multiplied match both the frequency range / frequency dividing means The portable wireless device according to claim 1 or 2, further comprising: The local oscillation frequency correction means generates a signal corresponding to the difference between them by comparing the frequency or phase of the output signal of the voltage controlled oscillator having as the reference signal and the local oscillation means for obtaining from said charger A phase lock loop means including a phase comparison means, a loop filter means for extracting a direct current component from the output of the phase comparison means, and a means for supplying the loop filter output as a frequency control signal of the voltage controlled oscillator, 4. The portable wireless device according to claim 1, further comprising frequency control voltage information memory means for storing frequency control signal information of the loop filter output in a state in which the phase lock loop is synchronized. . Charge detecting means including at least a local oscillating means and a battery as a high-frequency signal generating source of the transmitting section or the receiving section, and detecting that the battery is placed or connected to a charger when charging the battery, and the local oscillating means A reference signal receiving means for receiving a reference signal for correcting the oscillation frequency of, and a local oscillation frequency correcting means for matching or approximating the oscillation frequency of the local oscillation means with the frequency of the received reference signal, charging detecting unit,置又mounting the charger to a portable radio device operating the local oscillation frequency correction means when it is detected that they are connected in a charger for charging,
A charging circuit for generating a charging power to the battery charger, characterized in that it includes a reference signal generating means for generating a group No. Junshin for correcting the oscillation frequency of said local oscillation means of the portable radio device .   6. The charger according to claim 5, wherein the reference signal generating means is a thermostatic crystal oscillator (OCXO). According to claim 5 or 6 charger wherein the means for transmitting the group No. Junshin from said reference signal generating means to the portable radio is, means for transmitting superimposed weak radio signal generating means, the charging current for charging A charger characterized in that it is one of means for supplying to a terminal via a DC cut element and means for supplying by a reference signal dedicated terminal.

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