CN2315743Y - Radio adapter for mobile telephone - Google Patents

Abstract

The utility model relates to a radio adapter for a mobile telephone, which can change a hand-held mobile telephone into a wireless hand free mobile telephone. The utility model comprises an interface which is connected with the bottom of the mobile telephone, a duplex wireless transceiver circuit component which is used for transmitting and receiving the voice signal, a wireless voice transmitting device and a wireless voice receiving device which are matched with the circuit component and used independently. The two parts form a close range duplex wireless voice transmitting system to make the voice of the mobile telephone sent to the voice receiving device and make the signal of the voice transmitting device sent to the mobile telephone reversely. The utility model is suitable for various analog type mobile telephones and digital type mobile telephones. When the mobile telephone is used, the utility model can make a high-power transmitter not close a brain of a user, consequently can avoid the influence which is generated by that the electromagnetic wave radiate a head of the people, and simultaneously can make both hands of the user free to carry out other work and not disturb other people.

Description

Wireless adapter for mobile telephone

The utility model relates to a kind of telephone device, particularly relates to a kind of wireless adapter for mobile telephone that makes hand phone become wireless hands-free formula mobile phone.

As everyone knows, the existing history that goes up a century of the use of phone.Along with the mankind from the leap of industrial society to information-intensive society, phone also by single speech communication instrument to multi-functional, intellectuality, the development of the user information terminal machine of miniaturization.The appearance of hand phone and developing rapidly in the world make telephone communication enter brand-new era.Hand phone is little with its volume, and portable band uses the favor that is subjected to people flexibly.But people find also that in use it has certain side effect, during owing to the use hand phone, phone must be pressed close to head, and the electromagnetic wave that mobile phone antenna sent is understood the head of direct projection the people, and the head part is exerted an adverse impact.For this reason, people have taked some safeguard procedures, as adorn a protective jacket outside mobile phone, though certain effect is arranged, can not eliminate electromagnetic influence fully.In addition, under some specific situation, as drive, walk or both hands all when work, use mobile phone not only can make the people feel very inconvenience, even also have potential danger.For overcoming above-mentioned deficiency, people have made some improvement, mainly be to change hand phone into hands-free mobile phone, but this class scheme that is proposed so far has been line structure, being about to electrophone or adapter links to each other with mobile phone with lead, just proposed a kind of hand phone adapter of exempting from as Chinese patent 95229815.5, this adapter is a wire commutator, and is mainly used in automobile-used mobile phone.Though wire commutator can overcome the deficiency of mobile phone, carry and use inconvenience but still exist, lack defectives such as attractive in appearance during use.

The purpose of this utility model is to provide a kind of mobile phone that makes to avoid portable wireless adapter for mobile telephone, so that people can both throw off both hands and use mobile phone easily and safely in various occasions, and thoroughly eliminate strong electromagnetic wave radiation that mobile phone sends influence to user's head.

For achieving the above object, the utility model provides a kind of wireless adapter for mobile telephone, and it comprises:

One is connected in the mobile phone bottom interface, is used to transmit and receive the duplex wireless transmission circuit assembly of voice signal;

One is matched with the foregoing circuit assembly, and independent wireless words, the transmitter of being subjected to that uses;

Above-mentioned two parts constitute closely duplex wireless acoustic system, make the speech of mobile phone reach receiver by low powered radio, and the signal of transmitter also oppositely reaches mobile phone.

This adapter has adopted analog wireless communication technology and digital wireless communication technology, has therefore comprised analog wireless swticher and digital radio adapter, and is suitable for various analog mobile phones and digital mobile telephony.

Duplex wireless transmission circuit assembly 1 in the described analog wireless swticher comprises the frequency modulation(FM) radiating circuit 11 and a frequency receiving demodulation circuit 12 that links to each other with reception antenna with the mobile phone interface that link to each other with transmitting antenna with the mobile phone interface, and comprises that at least two are used to eliminate the low-pass filter circuit that the high-power wireless signal disturbs usefulness.

Duplex wireless transmission circuit assembly 3 in the described digital radio adapter comprises a voice/digital circuit 31 that links to each other with the mobile phone interface and a frequency modulation(FM) radiating circuit 32 that links to each other with transmitting antenna, also comprise a frequency receiving demodulation circuit 33 that links to each other with reception antenna and a numeral/sound circuit 34 that links to each other with the mobile phone interface, foregoing circuit all links to each other with single-chip microcomputer 35, and this assembly also comprises at least two low-pass filter circuits.

Wireless in the described analog wireless swticher talked about, transmitter 2 comprises that one has being talked about with what earphone 21 and had a transmitting antenna of reception antenna and send words with microphone 22, setting out on a journey to state is connected with audio power amplifier circuit 23 and frequency receiving demodulation circuit 24 between earphone and the reception antenna, be connected with frequency modulation(FM) radiating circuit 25 between above-mentioned microphone and the transmitting antenna.

Wireless in the described digital radio adapter talked about, transmitter 4 comprises that also one has being talked about with what earphone 41 and had a transmitting antenna of reception antenna and send words with microphone 42, be connected with frequency receiving demodulation circuit 43 and numeral/sound circuit 44 and the audio power amplifier circuit 45 that links to each other with single-chip microcomputer 48 between above-mentioned earphone and the reception antenna, be connected with frequency modulation(FM) radiating circuit 46 and the voice/digital circuit 47 that links to each other with single-chip microcomputer between above-mentioned microphone and the transmitting antenna.

Described wireless words, the transmitter of being subjected to has micro-integrated structure.

The utility model can make hand phone become wireless hands-free mobile phone, make the mobile phone user when conversation, not make high-power transmitter near brain, two and avoided the influence of electromagenetic wave radiation to the head part, simultaneously also making the user can throw off both hands carries out other work and does not disturb others again, particularly at some special occasions, as drive, the meeting of listening to the music, see a film or both hands use when doing other work will be very convenient. because no lead is connected between the electrophone of this adapter and the mobile phone, thereby use conveniently, and overcome the wire commutator lead and hang over the front and influence defective attractive in appearance.In addition, owing to have electrophone design very small of earphone and use the earplug audition, so use and carry all very convenient.

Fig. 1 is an analog wireless swticher structured flowchart of the present utility model.

Fig. 2 is a digital radio adaptor structure block diagram of the present utility model.

Fig. 3 is a wireless transceiver circuit assembly user mode schematic diagram.

Fig. 4 is wireless words, the transmitter profile schematic diagram of being subjected to.

Fig. 5 is the wireless transceiver circuit assembly circuit schematic diagram of analog wireless swticher.

Fig. 6 is wireless words, the transmitter circuit schematic diagram of being subjected to of analog wireless swticher.

Fig. 7 is the wireless transceiver circuit assembly circuit figure of digital radio adapter.

Fig. 8 is wireless words, the transmitter circuit figure of being subjected to of digital radio adapter.

Provide two preferred embodiments of the present utility model below, they have described the embodiment of analog wireless swticher and digital radio adapter in further detail.

Embodiment 1

Present embodiment provides the embodiment of a preferred analog wireless swticher.As shown in Figure 1, analog wireless swticher of the present utility model is a kind of voice signal transponder that is used for mobile phone, get in touch by wireless signal between it and the analog mobile phone, the voice signal that analog mobile phone is received is transmitted to the earphone of adapter and the voice signal of the microphone of adapter is transmitted to mobile phone and sends.

This analog wireless swticher comprises that a duplex wireless transmission circuit assembly 1 and one are wireless and is subjected to words, transmitter 2. wherein, wireless transceiver circuit assembly 1 comprises frequency modulation(FM) radiating circuit 11, frequency receiving demodulation circuit 12 and three low-pass filter circuits 13,14,15, its circuit as shown in Figure 5.Said frequencies modulation transmitter 11 adopts special-purpose f-m stereo acoustic emission integrated circuit BA1404, comprises signal amplifier and frequency mixer in this integrated circuit (IC) chip U1.Isolate through capacitor C 33, C30 from the mobile phone voice signal that H is ordered, 18 pin of delivering to U1 after resistance R 8, the R9 dividing potential drop enter the amplifier of IC interior, be amplified to the frequency mixer MPX and the pilot signal of establishing in being transported to behind certain level and form FM signal, and launch by radio circuit RF.Tranmitting frequency is by the decision of inductance L 3, capacitor C 24 numerical value, and in the present embodiment, tranmitting frequency is 60 to 80MHZ..Capacitor C 20 is regulated the RF output signal strength with inductance L 2 parallel resonance electrical equipment roads, C18 is external oscillating capacitance, 38KHZ oscillator signal one tunnel produces the pilot signal of 19KHZ through frequency divider, another road is to coding audio signal, code signal is by the 14 pin output of U1, and the pilot signal of exporting with 13 pin constitutes the composite frequency modulation signal.Frequency modulation(FM) radiating circuit 11 links to each other with the mobile phone bottom interface at H point place through peripheral circuit, and its output links to each other with transmitting antenna through capacitor C 31.FM signal is exported by integrated circuit (IC) chip the 7th pin, and is exported by the antenna emission through C31.Frequency receiving demodulation circuit 12 adopts special-purpose FM reception integrated circuit, this integrated circuit (IC) chip U2 comprise prime handle, in put, circuit such as frequency discrimination.After the microphone signal that wirelessly talked about, transmitter 2 emissions comes is received by reception antenna, through other signal of low pass filter filters out of forming by inductance L 5, L6, L7 and capacitor C 35, C36, C37 after capacitor C 10 enter by 11 pin of FM reception integrated circuit U2, in U2 through prime handle, in put, behind the frequency discrimination from the 2nd pin output of U2, after the demodulation audio signal after the emitter follower impedance matching of compositions such as triode Q1, resistance R 3, deliver to mobile phone as phonetic entry by the I point.Frequency receiving demodulation circuit 12 links to each other with reception antenna at the A point, and its output links to each other with the mobile phone interface through the emitter follower that Q1, R3 etc. form.Interference for the strong signal that prevents mobile phone 900MHZ, antenna in wireless transceiver circuit assembly 1 transmits and receives part and power unit is equipped with low-pass filter circuit, wherein by inductance L 8, L9, L10, the low-pass filter circuit 13 that capacitor C 38, C39, C40 form is added in the transmitting antenna part of mobile phone; The low-pass filter circuit of being made up of L5, L6, L7 and C35, C36, C37 14 is added in the reception antenna part of mobile phone; 15 of the low-pass filter circuits of being made up of L4, C34 are added in power unit.

Wireless transceiver circuit assembly 1 is by the battery of mobile telephone power supply, and the mobile phone power supply gives the wireless transceiver circuit assembly 1 power supply through diode D1, D2, D3 step-down after L4, the L34 filtering.The circuit board of wireless transceiver circuit assembly 1 is contained in as shown in Figure 3 the plastics system housing, has the interface that is used with mobile phone on the housing, during use, is inserted into the mobile phone bottom interface and gets final product.

Above-mentioned wireless words, the transmitter 2 of being subjected to comprises that one is subjected to words to send words usefulness microphone 22 with earphone 21 and one, its profile as shown in Figure 4, be connected with audio power amplifier circuit 23 and frequency receiving demodulation circuit 24 between above-mentioned earphone and the reception antenna, be connected with frequency modulation(FM) radiating circuit 25 between microphone and the transmitting antenna.Wireless be subjected to words, the transmitter circuit principle as shown in Figure 6, wherein, frequency modulation(FM) radiating circuit 25 adopts special-purpose f-m stereo acoustic emission integrated circuit (IC) chip BA1404 (U3), frequency receiving demodulation circuit 24 adopts FM reception integrated circuit (IC) chip TDA7010 (U4), and audio power amplifier circuit 23 adopts audio frequency power amplifier integrated circuit MC34119 (U5).Sound when the user talks changes the signal of telecommunication into by microphone 22 (BM), R12 is the pull-up resistor of BM, capacitor C 1 is with the filtering of radio-frequency component composition, resistance R 2 and capacitor C 21 are in parallel to be preemphasis network, after the 18th pin amplification of frequency modulation emission integrated circuit (IC) chip U3, modulate every straight back by capacitor C 21 again, form FM signal and pass through capacitor C 31 by transmission antennas transmit by the 7th pin.Other peripheral circuit and wireless transceiver circuit component class are seemingly.Wireless words, the transmitter of being subjected to is when receiving, the low pass filter elimination that the signal that is sent by wireless transceiver circuit assembly 1 is formed by L1, C13 through reception antenna is removed other signal after capacitor C 10 enters the 11st pin of FM reception integrated circuit (IC) chip U4, through prime handle, in put, behind the frequency discrimination by the audio signal after the 2nd pin output demodulation, control capacittance C18 makes received signal the strongest, and C6, C7, C8, C9, C11, C12, C14, C16, C19 are filter capacitor.Audio signal after the demodulation is amplified through capacitor C 4 the 4th pin to audio frequency power amplifier integrated circuit U5 after straight, the work of promotion earphone, adjusting resistance R 4, R10 can change volume, and the influence of earphone induction reactance is offset in resistance R 11, capacitor C 37 series connection, and C5, C36, C38 are filter capacitor.Frequency modulation(FM) radiating circuit 25 is linked to each other with microphone 22 through peripheral circuit by 18 pin of U3, and its output is linked to each other with transmitting antenna by the 7 foot meridian capacitor C31 of U3.The input of frequency receiving demodulation circuit 24 is linked to each other with reception antenna by its 11 foot meridian capacitor C10, and its output connects the 4th pin of audio power amplifier circuit 23 (U5) by 2 foot meridian capacitor C4, and the output of audio power amplifier circuit links to each other with earphone through 8 pin.

Wireless words, the transmitter of being subjected to links to each other with mobile phone without lead, is the parts that can independently use therefore.For making it more convenient to carry, with wirelessly talked about, the earphone portion of transmitter and microphone part and circuit thereof make one, and littler with its size design, and become a miniature electrophone.Not the time spent, can it be inserted in the pocket as a pen, its external form as shown in Figure 4.Wirelessly be subjected to words, transmitter is battery-powered, and mains switch is housed on housing.

Embodiment 2

Since digital communication technology develop increasingly extensive use with digital mobile telephony rapidly, the utility model has more importantly meaning to digital mobile telephony, and this preferred embodiment will carry out more detailed description to the invention scheme of digital wireless swticher.

The digital radio adapter is a kind of voice signal transponder that is applicable to various mobile phones, get in touch by wireless signal between it and the mobile phone, the voice signal that mobile phone is received is transmitted to the earphone of adapter and the voice signal of the microphone of adapter is transmitted to mobile phone and sends.

As shown in Figure 2, this adapter is the same with analog wireless swticher, also comprises a duplex wireless transmission circuit assembly 3 and wireless words, the transmitter 4 of being subjected to.Wherein, wireless transceiver circuit assembly 3 comprises 32, one frequency receiving demodulation circuits 33 of 31, one frequency modulation(FM) radiating circuits of a voice/digital circuit and a numeral/sound circuit 34, foregoing circuit all links to each other with single-chip microcomputer 35, and this assembly also comprises two low-pass filter circuits 36,37.Above-mentioned voice/digital circuit 31 is made up of integrated circuit (IC) chip U6 (MSM6588L) and peripheral circuit thereof, and its MIN foot meridian capacitor C14 links to each other with the mobile phone interface.Frequency modulation(FM) radiating circuit 32 mainly is made up of triode Q3, capacitor C 20, resistance R 19 and transmitting antenna etc., and its input and output side links to each other with transmitting antenna with 8 single-chip microcomputer U8 respectively.Frequency receiving demodulation circuit 33 mainly is made up of triode Q1, Q2, reception antenna and other related elements, and its input links to each other with 8 single-chip microcomputers with reception antenna respectively with output.Numeral/sound circuit 34 is made up of integrated circuit U7 (MSM6588L) and peripheral circuit thereof, and its input links to each other with 8 single-chip microcomputers, and output links to each other with the mobile phone interface through capacitor C 12.

Wireless transceiver circuit assembly 3 circuit theories as shown in Figure 7, isolate through capacitor C 14 from the mobile phone voice signal that MIC1 is ordered, the MIN pin of delivering to voice/digital circuit 31 (U6) after the regulating resistor VR18 dividing potential drop enters IC interior, and this integrated circuit carries out sending after filtering, 12 mould/transformations of variables and the compression of adaptive differential pulse code (ADPCM) speech data 8 single-chip microcomputer U8 to carry out the identification code combination to the voice signal that enters and becomes serial data and deliver to the signal modulation transmitter of being made up of Q3 etc. and launch; Tranmitting frequency is by the decision of L, C28 numerical value, and tranmitting frequency is 60 to 80MHZ in this example.Electric capacity X3, C4, C5 provide the work clock of 4M for U6, and resistance R 2, capacitor C 11 provide the electrification reset of U6.

Talked about from wireless, the microphone signal that transmitter 4 emissions come is by reception antenna process L5, enter the receiving circuit that Q1 forms behind other signal of low pass filter filters out that C35 forms, the frequency-discriminating circuit frequency discrimination of forming through Q2 again, delivering to single-chip microcomputer U8 at last goes here and there and changes, identification code is separated and identification, do not adopt if then will not manage for corresponding identification code, corresponding identification code is then carried out adaptive differential pulse code (ADPCM) decompression with the parallel numeral/sound circuit 34 (U7) of delivering to of speech data, and then become voice through 12 figure places/modular transformation, voice signal is isolated output from the AOUT pin output of U7 through capacitor C 12, delivers to mobile phone as phonetic entry.Electric capacity X2, C7, C8 are the work clock that 4M is provided of U7, and resistance R 10, capacitor C 10 provide the electrification reset of U7.

8 single-chip microcomputer U8 are responsible for the audio digital signals that integrated circuit (IC) chip U6 sends here is carried out the identification code combination and the serial digital voice signal that receiving demodulation circuit is sent here is gone here and there and changed, and identification code is separated and identification, the parallel integrated circuit (IC) chip U7 that send.The electrification reset that electric capacity X1, C6, C9 provide 4M resistance R 1, capacitor C 13 that U1 is provided for single-chip microcomputer, S2-S9 is the identification code configuration switch.

Interference for the strong signal that prevents mobile phone 900MHZ, transmitting antenna in wireless transceiver circuit assembly 3 and reception antenna partly are provided with low-pass filter circuit, wherein by capacitor C 1, C2, C3, the inner amplifier of resistance R 7, R8, R9 and integrated circuit U6 is formed low-pass filter circuit 37, and this circuit is added in the transmitting antenna part.Inductance L 5 and capacitor C 35 are formed bandwidth-limited circuit 36, and this circuit is added in the reception antenna part.

Wireless transceiver circuit assembly 3 is powered by battery of mobile telephone.The circuit board of wireless transceiver circuit assembly 3 is contained in as shown in Figure 3 the plastics system housing, has the interface that is used with mobile phone on the housing, during use, is inserted into the mobile phone bottom interface and gets final product.

Described wireless words, the transmitter 4 of being subjected to comprises that also one is subjected to words to send words usefulness microphone 42 with earphone 41 and one, its profile also as shown in Figure 4, by accompanying drawing 2 circuit block diagrams as can be known, be connected with frequency receiving demodulation circuit 43 and numeral/sound circuit 44 and audio power amplifier circuit 45 between above-mentioned earphone and the reception antenna, be connected with frequency modulation(FM) radiating circuit 46 and voice/digital circuit 47 between above-mentioned microphone and the transmitting antenna, foregoing circuit all links to each other with single-chip microcomputer 48.Said frequencies receiving demodulation circuit 43 mainly is made up of triode Q4, Q5, reception antenna and other related elements, and its input links to each other with 8 single-chip microcomputer U11 with reception antenna respectively with output.Numeral/sound circuit 44 mainly is made up of integrated circuit (IC) chip U10 (MSM6588L) and peripheral circuit thereof, it by data wire and control line and 8 single-chip microcomputer U11 with link to each other, its output links to each other with earphone 41 through audio power amplifier circuit 45.Above-mentioned audio power amplifier circuit 45 with wirelessly talked about, audio power amplifier circuit 23 identical (not shown)s in the transmitter 2.Said frequencies modulation transmitter 46 mainly is made up of triode Q6, resistance R 19, capacitor C 20, C28 and transmitting antenna etc., and its input links to each other with single-chip microcomputer U11, and antenna is penetrated in the output sending and receiving.Above-mentioned voice/digital circuit 47 mainly mainly is made up of integrated circuit (IC) chip U9 (MSM6588L) and peripheral circuit thereof integrated circuit (IC) chip U9 (MSM6588L) and peripheral circuit group predicate sound/digital circuit 47 thereof, its input links to each other with microphone 42 through capacitor C 14 divider resistance VR1, resistance R 11, and its output links to each other with 8 single-chip microcomputer U11.

The wireless word, transmitter 4 operation principles as shown in Figure 8, mobile phone voice signal from wireless transceiver circuit assembly 3 passes through inductance L 5 by reception antenna, enter the frequency receiving demodulation circuit behind other signal of low pass filter filters out that capacitor C 35 is formed, by receptions such as triode Q4, and deliver to 8 single-chip microcomputer U11 behind the frequency-discriminating circuit frequency discrimination of forming by Q5 etc. and go here and there and change, identification code is separated and identification, do not adopt if then will not manage for corresponding identification code, corresponding identification code is then carried out adaptive differential pulse code (ADPCM) decompression with the parallel integrated circuit (IC) chip U10 that delivers to of audio digital signals, and then become voice signal through 12 bit digital/phonetic modification, voice signal is from the AOUT pin output of U10, and output signal is given the earphone sounding after capacitor C 12 is isolated.Voice signal from microphone is isolated through capacitor C 14, divider resistance VR1 dividing potential drop after the MIN pin of integrated circuit U9 enter, U3 carries out filtering, 12 bit digital/phonetic modification to the voice signal that enters, adaptive differential pulse code (ADPCM) speech data compressing and converting becomes digital signal, send single-chip microcomputer U11 by data wire, data after the processing have added identification code (non-fixed portions is by S2 to S9), and U1 handles the back serial and delivers to the frequency modulation(FM) radiating circuit 46 of composition such as triode Q6 and be modulated into high-frequency signal by transmission antennas transmit.Tranmitting frequency is by the decision of inductance L, capacitor C 28 numerical value, and tranmitting frequency is 60 to 80MHZ in this example.Resistance R 7, R7, R9, the inner amplifier of capacitor C 1, C2, C3 and integrated circuit U9 is formed low-pass filter circuit and signal amplification circuit.U9 is provided the work clock of 4M by electric capacity X3, C4, C5.Resistance R 2, capacitor C 11 provides the electrification reset of U9.8 single-chip microcomputer U11 be wirelessly talked about, the control centre of transmitter, it is by the work of I/O mouth control integrated circuit U9, U10, and the data-signal that U9 sends here carried out sending the frequency modulation(FM) radiating circuit 46 emissions after the identification code combination, and the data-signal that receive frequency receiving demodulation circuit 43 is sent here gone here and there and change, identification code separate and identification after send U10.This single-chip microcomputer provides the work clock of 4M by electric capacity X1, C6, C9, and luminous tube LED1 is the signal transmitting and receiving status indicator lamp, and R13 is a current-limiting resistance.Resistance R 1, capacitor C 13 provide the electrification reset of single-chip microcomputer.S2 to S9 is the identification code configuration switch.

Wireless words, the transmitter 4 of being subjected to links to each other with mobile phone without lead, is the parts that can independently use therefore.For making it more convenient to carry, with wirelessly talked about, the earphone portion of transmitter and microphone part and circuit thereof make one, and littler with its size design, and become a miniature electrophone.Not the time spent, can it be inserted in the pocket as a pen, its external form as shown in Figure 4.Wirelessly be subjected to words, transmitter is battery-powered, and mains switch is housed on housing.

Claims (7)

1, a kind of mobile phone line adapter that makes hand phone become wireless hands-free formula mobile phone is characterized in that this adapter comprises:

One is connected in the mobile phone bottom interface, is used to transmit and receive the duplex wireless transmission circuit assembly of voice signal;

One is matched with the foregoing circuit assembly, and independent wireless words, the transmitter of being subjected to that uses;

Above-mentioned two parts constitute closely duplex wireless acoustic system, make the speech of mobile phone reach receiver by low powered radio, and the signal of transmitter also oppositely reaches mobile phone.

2, wireless adapter for mobile telephone according to claim 1 is characterized in that, this adapter comprises analog wireless swticher and digital radio adapter.

3, wireless adapter for mobile telephone according to claim 2, it is characterized in that, duplex wireless transmission circuit assembly 1 in the described analog wireless swticher comprises the frequency modulation(FM) radiating circuit 11 and a frequency receiving demodulation circuit 12 that links to each other with reception antenna with the mobile phone interface that link to each other with transmitting antenna with the mobile phone interface, and comprises that at least two are used to eliminate the low-pass filter circuit that the high-power wireless signal disturbs usefulness.

4, wireless adapter for mobile telephone according to claim 2, it is characterized in that, duplex wireless transmission circuit assembly 3 in the described digital radio adapter comprises a voice/digital circuit 31 that links to each other with the mobile phone interface and a frequency modulation(FM) radiating circuit 32 that links to each other with transmitting antenna, also comprise a frequency receiving demodulation circuit 33 that links to each other with reception antenna and a numeral/sound circuit 34 that links to each other with the mobile phone interface, foregoing circuit all links to each other with single-chip microcomputer 35, and this assembly also comprises at least two low-pass filter circuits.

5, wireless adapter for mobile telephone according to claim 1, it is characterized in that, wireless in the described analog wireless swticher talked about, transmitter 2 comprises that one has being talked about with what earphone 21 and had a transmitting antenna of reception antenna and send words with microphone 22, be connected with audio power amplifier circuit 23 and frequency receiving demodulation circuit 24 between above-mentioned earphone and the reception antenna, be connected with frequency modulation(FM) radiating circuit 25 between above-mentioned microphone and the transmitting antenna.

6, wireless adapter for mobile telephone according to claim 1, it is characterized in that, wireless in the described digital radio adapter talked about, transmitter 4 comprises that also one has being talked about with what earphone 41 and had a transmitting antenna of reception antenna and send words with microphone 42, be connected with frequency receiving demodulation circuit 43 and numeral/sound circuit 44 and the audio power amplifier circuit 45 that links to each other with single-chip microcomputer 48 between above-mentioned earphone and the reception antenna, be connected with frequency modulation(FM) radiating circuit 46 and the voice/digital circuit 47 that links to each other with single-chip microcomputer between above-mentioned microphone and the transmitting antenna.

According to claim 5,6 described wireless adapter for mobile telephone, it is characterized in that 7, described wireless words, the transmitter of being subjected to has micro-integrated structure.

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