CN2468245Y - Freely combinable modular mobile phone - Google Patents

Abstract

The utility model relates to a modularized mobile telephone capable of free combination. The mobile telephone divides a complete appliance of the mobile telephone into three detachable and replaceable modules such as a radio frequency module, a man-machine interface module and a power supply module, wherein, the radio frequency module 1 comprises a GSM system module, a DECT system module, a CDMA system module or other system modules; the man-machine interface module 2 can be a man-machine interface module only capable of telephoning, or can be a man-machine interface module with the function of a clock, an alarm clock and recording and is additionally provided with RS 232 serial ports; the power supply module 3 can be a common power supply module or can be an intelligent power supply module provided with a microprocessor with ultralow power consumption inside. The utility model enables a user to change the network of a mobile telephone from one to another by only replacing the module but not the complete appliance. As a result, the telephone can be used in a new network.

Description

Freely combinable modular mobile phone

The utility model relates to a terminal product of mobile communication, in particular to a modular mobile phone which can be changed with the change of the network and can be combined freely.

As we all know, a general mobile phone is composed of a mobile phone main body and a battery. That is to say, a general mobile phone can only be divided into two modules, the main body and the battery, and only the battery module can be disassembled and replaced. Although some mobile phones can be replaced by users themselves, existing various mobile phones cannot allow users to replace components related to networks or functions. With the development of mobile communication technology, the mobile communication network and its management methods are constantly changing, and the cycle of this change is getting shorter and faster, and this change will directly lead to the existing fixed component type of mobile phones are technologically obsolete or obsolete because they cannot adapt to changes in the network or how it is managed. It is conceivable that a mobile phone that has been purchased for two years may not be able to use the current new technology applications, or cannot adapt to changes in network management methods, leading to the above results. And if users need to use the current new technology, they must update the whole machine, which is neither economical nor realistic for ordinary users. In addition, the existing fixed member type mobile phone cannot be used as a car phone or the like. Thus it can be seen that it is inevitable to develop a modular mobile phone that can be combined freely. So far, there are no reports about the modular modular mobile phone.

The utility model is made in response to the above problems, and its purpose is to provide a mobile phone that is divided into several functional modules that can be disassembled and replaced. By replacing the modules, it can adapt to new network management methods, or have new functions. Freely combinable modular mobile phone.

In order to achieve the above purpose, the utility model provides a modular mobile phone that can be combined freely. Modules, so that users can adapt to different networks or standards by replacing the modules.

The radio frequency (RF) module 1 includes a module of GSM standard, a module of DECT standard, a module of CDMA standard, and may also be a module of other standards.

The man-machine interface (OP) module 2 can be a man-machine interface module that can only make phone calls, and can also be a man-machine interface module that has clock and alarm clock functions, recording functions and an RS232 serial port.

The power supply module 3 can be an ordinary power supply module, or an intelligent power supply module with a built-in ultra-low power consumption microprocessor (MCU).

Described radio frequency (RF) module 1 is made up of receiving circuit 11, transmitting circuit 12 and control circuit 13, and wherein receiving circuit 11 is made up of antenna, bandpass filter J200, front-end integrated circuit H200, intermediate frequency filter J201, intermediate frequency integrated circuit H500 successively The transmission circuit 12 is formed by connecting the signal processor C5510, the intermediate frequency integrated circuit H500, the voltage-controlled oscillator G300, the power amplifier A400, the filter Z400, the antenna switch ANTSW and the antenna in sequence; the control circuit 13 is formed by band-pass filtering It consists of a radio frequency circuit composed of a device J200, a front-end integrated circuit H200 and its peripheral devices, and an intermediate frequency filter J201.

Described various types of man-machine interface (OP) modules 2 are all provided with a, b, c three groups of plug-in interfaces, wherein a interface is connected with power supply module 3; b interface is connected with radio frequency (RF) module 1; c interface connects send/ Receiver multiplexer and keyboard multiplexer.

Described man-machine interface (OP) module 2 comprises microprocessor 21 and the clock circuit 22 that is connected with it, multifunctional digital/analog converter 23, digital recording circuit 24, keyboard circuit 25 and display 26, and digital recording circuit is also connected with The clock circuit is connected with the multifunctional digital/analog converter, and the microprocessor, the clock circuit and the multifunctional digital/analog converter are connected with the b interface of the module.

The radio frequency module is provided with a PCMCIA interface connected with other modules; the power supply module is also provided with an interface connected with the power supply interface of the man-machine interface module and a charging interface.

The positive effect of the utility model is that it breaks through the fixed component mode of the existing mobile phone, and solves the problem that the existing mobile phone cannot be changed with the change of the network management mode and system. Because the utility model divides the mobile phone into several modules that can be disassembled and replaced, when the user changes from one network (such as GSM) to another network (such as CDMA), he only needs to replace the module instead of the whole machine. Can be used in new networks. For example, the whole machine purchased by the user at the beginning is an English machine, and now it is desired to change the display to Chinese, and to be able to send and receive short messages. At this time, it is only necessary to replace the module 2 to meet the requirements without replacing the whole machine. This provides the possibility and convenience for the user to adapt to the development of the new technology of the mobile communication network, and can avoid the economic loss caused by the user changing the mobile phone due to changing the network.

Below in conjunction with accompanying drawing and a preferred embodiment the utility model is further described.

Fig. 1 is a structural block diagram of the utility model.

Fig. 2 is a structural block diagram of the radio frequency module of the present invention.

Fig. 3 is a block diagram of the man-machine interface module of the present invention.

Fig. 4 is a schematic structural diagram of the power module of the present invention.

Fig. 5 is a schematic diagram of the PCMCIA interface of the radio frequency module.

Fig. 6 is a schematic diagram of the radio frequency module circuit of the GSM standard.

Fig. 7 is the schematic diagram of the circuit of the telephone base of the utility model used as a car phone.

Referring to Fig. 1, the freely combinable modularized mobile phone of the present invention divides the whole mobile phone into three replaceable modules of radio frequency (RF), man-machine interface (OP) and power supply, so that the user can replace them modules to adapt to different networks or standards.

The structures of the above three modules are shown in Figures 2 to 4. The radio frequency (RF) module 1 includes a module of GSM standard, a module of DECT standard, a module of CDMA standard, and may also be a module of other standards. Fig. 2 has only provided the structure of GSM standard module, and this module internal circuit is as shown in Fig. 6, and radio frequency (RF) module 1 is made of receiving circuit 11, transmitting circuit 12 and control circuit 13, and wherein receiving circuit 11 is made of antenna, band A pass filter J200, a front-end integrated circuit H200, an intermediate frequency filter J201, and an intermediate frequency integrated circuit H500 are connected in sequence. The above-mentioned devices are all commercially available general-purpose devices. When receiving, the circuit filters, amplifies, first mixes, and second mixes the received radio frequency signals coupled by the antenna, and finally generates baseband signals (RXIFP, RXIFN) and a third set of receiving strength indicator signals (RSS11, RSS12, RSS13 ). The transmitting circuit 12 is composed of a signal processor C5510, an intermediate frequency integrated circuit H500, a voltage-controlled oscillator G300, a power amplifier A400, a filter Z400, an antenna switch ANTSW and an antenna connected in sequence. The above-mentioned devices also adopt commercially available general-purpose devices. When transmitting, the circuit modulates the transmitting baseband signal (MODIP, MODIN, MODQP, MODQN) from the logic/audio processing part, up-converts the frequency to the transmitting intermediate frequency, and then up-converts the frequency to transmit the radio frequency signal. After power amplification and filtering, the Antenna launch. The control circuit 13 is composed of a bandpass filter J200, a radio frequency circuit composed of a front-end integrated circuit H200 and its peripheral devices, and an intermediate frequency filter J201.

The radio frequency module is provided with a PCMCIA interface connected with the man-machine interface module.

The operating principle of the receiving circuit and the transmitting circuit of the above-mentioned radio frequency (RF) module 1 can be described as follows in conjunction with FIG. 6:

1. Receiving circuit: The radio frequency modulated carrier signal (935~ _960MHz ) sensed by the antenna is coupled by the matching circuit, purified and filtered by the receiving bandpass filter J200, and enters its internal amplification from pins 5 and 6 of the front-end integrated circuit H200 . The local oscillating signal (1006~ _1031MHz ) in the receiving state is amplified and enters the H200 from pins 17 and 18 of the H200. The received radio frequency signal is mixed with the local oscillator signal by the mixer in H200, and the _71MHz received first intermediate frequency signal generated is filtered by the intermediate frequency filter J201, and then sent to the pins 7 and 6 of the intermediate frequency integrated circuit H500. It is amplified inside first, and then mixed with the second local oscillator signal of _65MHz after the _13MHz reference frequency is multiplied by 5 times inside the H500. The difference frequency signal after mixing is output from pin 2 of H500, purified and filtered by filters Z500 and Z501 with a center frequency of _6MHz , and then enters H500 from pin 47 to be amplified and output from pin 44. The output signal is filtered by the _band -pass filter Z502 with a center frequency of _6MHz , and enters the H500 from pin 40 for amplification, and finally outputs 6MHz from pins 33 and 34 of the H500 to receive intermediate frequency positive and negative signals (RXIFP, RXIFN). Amplify three times, and each time amplifies a group of receiving strength indication signals, which are respectively output from pins 3, 45 and 35 of the H500. The RXIFP and RXIFN signals generated by H500 are output from pins 33 and 34 and enter pins 57 and 58 of the multi-mode converter H800 to convert them into digital voice signals. The receiving strength indication signal also enters from pins 52, 53, and 54 of H800, and the generated digital signal is delivered by the signal processor C5510 to the microprocessor of the man-machine interface module through the serial port of PCMCIA, which controls the display to indicate the signal strength. LCD display shows received strength signal. The digital voice signal generated by H800 is sent to the signal processor C5510 for equalization processing, and then decrypted and decoded for the purpose of error detection and correction. The decoder is used to improve the "soft information" error correction quality from the equalizer, so that the symbols can eliminate the errors in transmission as much as possible, and then the voice signal stream (PCM code) is output through the DR terminal of PCMCIA.

2. Transmitting circuit: The digital baseband signal DX (PCM) is sent to the signal processor C5510 for speech coding, and after the PCM baseband signal representing the sound is converted into a digital baseband signal with a lower bit rate, channel coding, interleaving, encryption and bursting are performed. Pulse formation processing. Before the digital signal is sent to the transmitting I/Q signal modulator, it is converted into an analog I/Q modulation signal (MODIP, MODIN, MODQP, MODQN) with a phase difference of 90° inside the C5510. These two groups of signals enter the internal modulator through pins 27, 28, 29, and 30 of H500. After mixing, the frequency becomes _117MHz , and conducts phase discrimination with the transmit RF sampling signal sent by H200, and transmits a voltage-controlled oscillator. The G300 generates a radio frequency signal TX that conforms to the GSM specification. The TX signal is amplified by the power amplifier A400 and then filtered by the filter Z400. Under the control of the logic circuit, the TX signal reaches the antenna through the antenna switch (V402, V403) for transmission by the transmitting circuit. The antenna switch control signal realizes the switching of receiving and sending signals at the bases of V400 and V401.

3. Control circuit: The front-end function of the radio frequency part is realized by the radio frequency circuit composed of J200, H200 and related peripheral components, and the intermediate frequency filtering function is realized by the surface acoustic filter J201. The specific circuit is shown in Figure 6. In the receiving part of the front-end circuit, the signal of the receiving frequency band _935-960MHz selected by the filter J200 is amplified and then converted into the first intermediate frequency signal of _71MHz by the down-conversion circuit. The down-conversion process is realized by mixing the received signal with the local oscillator signal, that is, the local oscillator circuit is controlled by a logic circuit to generate a local oscillator frequency _71MHz higher than the received signal, and the local oscillator frequency is mixed with the received signal to obtain _71MHz first IF signal. In the transmitting part of the front-end circuit, after the transmission sampling signal (TXIN) is filtered, it is converted from single-mode to dual-mode and sent from pins 8 and 9 of H200. The 17, 18 feet are fed into. The two signals are mixed in the H200 to generate _117MHz transmission intermediate frequency sampling signals (TXIFA, TXIFB), which are sent to pins 10 and 11 of the H500, and the phase detector PHD performs phase discrimination with the _117MHz signal in the H500, according to the logic circuit is required to lock the transmit frequency.

Described man-machine interface module 2 structure as shown in Figure 3, it can be the man-machine interface module that can only make a phone call, also can be the man-machine interface module that has clock and alarm function, recording function and has set up RS232 serial port. This module comprises microprocessor 21 and the clock circuit 22 that is connected with it, multifunctional digital/analog converter 23, digital recording circuit 24, keyboard circuit 25 and display 26, digital recording circuit is also connected with clock circuit and multifunctional digital/analog The converter is connected, and the microprocessor, the clock circuit and the multifunctional digital/analog converter are connected with the b interface of the module. Each type of man-machine interface (MCU) module 2 is equipped with three groups of plug-in ports a, b, and c, wherein a port is connected to the power module 3; b port is connected to the radio frequency (RF) module 1; c port is connected to the transmitter/receiver complex connectors and keyboard multiplexers.

The electrical connection between the man-machine interface module and the wireless module is realized through the PCMCIA interface.

The working principle of the human-machine interface module is shown in Figure 3. The multi-function digital-to-analog converter 23 (ST5095) is used to convert the analog voice of the microphone into a PCM signal. It is connected to two microphones on the right, one for the module and one for the External, it selects the input microphone under MCU control. There are also two-way earpiece circuits, which can also complete 16K output switching under the control of the microprocessor (MCU). The multifunctional digital-to-analog converter ST5095 can send DTMF signals under the control of the MCU, complete A/ADPCM conversion, and adjust the level of the microphone and earpiece. The digital recording circuit 24 (Logic & FLASH) is under the control of the MCU, and the logic array (Logic) is driven by the clock circuit (Timer), and the 2-bit data of ADPCM is changed into 16 bits (words) after 8 times, and written into the FLASH; otherwise, Change the word of FLASH into 2 bits, and send it to ST5095 circuit in 8 times. FLASH is 2M words, at least 30 minutes of speech can be stored. The highest segment 4K in FLASH is used for phone number storage, and at least 100 phone numbers can be stored. The keyboard circuit 25 uses a 45 matrix to detect 0-9, #, * keys and the call/answer key, the main menu display, and the menu selection key (two keys), and the earphone volume buttons use two (T+, T-) , a total of 16 keys, using the NM interrupt line of the MCU as the start/standby key. Microprocessor 21 (MCU) uses the ST6285 microcontroller of ST Company, and the PROM of 8K, the ROM of 193 bytes, the EEPROM of 128 bytes are arranged inside it. 3 8-bit ports and controllable 48×16 dot-matrix LCD display. This is a powerful MCU with a power consumption of less than 0.05 watts. In the standby state, the MCU can be started by the keyboard or the wireless module, and then the functional module is powered on. The microprocessor ST6285 is a device working at 3.9V, and the signal voltage of the serial port RS232 is ±9V~15V, and its working voltage is obtained by boosting the M232 chip.

2、呼入

Its working process is:

2. Call in

The end of the call is the same as the end of the call in the state transition of the outgoing call.

The power module is shown in Figure 4, it can be an ordinary power module, or an intelligent power module with a built-in ultra-low power consumption microprocessor (MCU). Both power modules are provided with an interface connected to the power interface of the man-machine interface module and a charging interface.

The utility model also can have other application: a, be used for car phone

It needs to cooperate with a special platform to realize call-in without operation. The stand circuit is shown in Figure 7. When the mobile phone is inserted into the stand, the Pin31 pin (PB4) of the microprocessor ST6285 is 0 (otherwise it is 1), and the ST6285 automatically switches to the car phone mode. When the call comes in (rings) 10 seconds later, the mobile phone will automatically go off-hook, and at the same time, the voice circuit of the ST6285 control seat is powered on, and the driver makes a hands-free call. At the end of the conversation, if the other party hangs up first, after ST6285 receives the RF module signal for 10 seconds (busy tone about 6 times), ST6285 will send disconnection to the RF module and power down the voice circuit of the landline at the same time. If the driver wants to actively hang up, he only needs to press K in Figure 8 for 0.5 seconds, and the ST6285 will enter the transition state after receiving the signal. Drivers can also use a headset/mic, just plug it into J in the diagram.

B. Other applications

The RF module can also be used as a wireless relay of PABX. This kind of application can make the ordinary relay of PABX suffer damage, and use such a relay to ensure that there is still a channel for outgoing/incoming calls of PABX.

Compared with the existing terminal, the utility model prolongs the service life of the whole machine, can be used for multiple purposes (applied to portable PC, automobile mobile phone, etc.), and allows the end user to perform maintenance of various functions by himself.

Claims (7)

1. A modular mobile phone that can be combined freely, is characterized in that it divides the mobile phone into three replaceable modules of radio frequency (RF), man-machine interface (OP) and power supply, so that users can replace The modules among them adapt to different networks or standards. 2. The freely combinable modular mobile phone according to claim 1, characterized in that the radio frequency (RF) module (1) includes a GSM standard module, a DECT standard module, and a CDMA standard module. 3. The freely combinable modular mobile phone according to claim 1, characterized in that the man-machine interface (OP) module (2) can be a man-machine interface module that can only make calls, or can have Clock and alarm function, recording function and human-machine interface module with RS232 serial port added. 4. The freely combinable modular mobile phone according to claim 1, characterized in that the power supply module (3) can be an ordinary power supply module, or a built-in ultra-low power consumption microprocessor (MCU). Intelligent power module. 5. The freely combinable modular mobile phone according to claim 2, characterized in that the radio frequency (RF) module (1) is composed of a receiving circuit (11), a transmitting circuit (12) and a control circuit (13) The receiving circuit (11) is composed of an antenna, a bandpass filter J200, a front-end integrated circuit H200, an intermediate frequency filter J201, and an intermediate frequency integrated circuit H500; the transmitting circuit (12) is composed of a signal processor C5510, an intermediate frequency integrated circuit H500, voltage-controlled oscillator G300, power amplifier A400, filter Z400, antenna switch ANTSW and antenna are connected in sequence; the control circuit (13) is a radio frequency composed of band-pass filter J200, front-end integrated circuit H200 and its peripheral devices circuit and intermediate frequency filter J201. 6. The freely combinable modular mobile phone according to claim 3, characterized in that, said various types of man-machine interface (OP) modules (2) are provided with three groups of sockets a, b, and c, wherein The a interface is connected to the power module (3); the b interface is connected to the radio frequency (RF) module (1); the c interface is connected to the transmitter/receiver multiplexer and the keyboard multiplexer. 7. The freely combinable modular mobile phone according to claim 6, characterized in that the man-machine interface (OP) module (2) includes a microprocessor (21) and a clock circuit (22) connected thereto ), multifunctional digital/analog converter (23), digital recording circuit (24), keyboard circuit (25) and display (26), digital recording circuit is also connected with clock circuit and multifunctional digital/analog converter, microprocessing The device, the clock circuit and the multifunctional digital/analog converter are connected with the b interface of the module.

Images