CN2253895Y - infrared ray transmission wireless telephone set - Google Patents
infrared ray transmission wireless telephone set Download PDFInfo
- Publication number
- CN2253895Y CN2253895Y CN95216524U CN95216524U CN2253895Y CN 2253895 Y CN2253895 Y CN 2253895Y CN 95216524 U CN95216524 U CN 95216524U CN 95216524 U CN95216524 U CN 95216524U CN 2253895 Y CN2253895 Y CN 2253895Y
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- China
- Prior art keywords
- infrared
- circuit
- frequency
- base
- mobile phone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Mobile Radio Communication Systems (AREA)
Abstract
The utility model relates to an infrared ray transmission wireless telephone set, which is composed of a mobile phone and a base set. The base set is provided with a group of infrared emission devices and a group of infrared receiving devices with different frequencies; the mobile phone is provided with a group of infrared emission devices and a group of infrared receiving devices corresponding to the base set. The utility model adopts the infrared light to work separately with double power frequencies, and achieves the function of the cordless telephone set to movably talk in small ranges to ensure the talk to be more secret and safer.
Description
The utility model relates to a kind of telephone set, particularly a kind of cordless telephone.
Employed a few days ago cordless telephone, mobile phone and base all are to utilize radio wave to transmit.Taken the channel resource of radio wave like this, on the one hand; Radio wave has stronger penetration capacity on the other hand, its first-harmonic and harmonic wave thereof, and the radio system around disturbing easily is as television set, broadcast receiver etc.; When contiguous when also similar cordless telephone being arranged, also easily cause mutual eavesdropping, beat with surreptitiouslying, mistake is beaten etc., this brings inconvenience to use again.
The purpose of this utility model be to provide a kind of can be among a small circle mobile call, do not take the radio channel resource again; Make the more secret and safe of conversing; Simultaneously, do not influence the normal cordless telephone that uses of other electrical equipment again.
The infrared biography that the utility model proposes is advanced cordless telephone and is made of mobile phone and base.Base connects with outside line, and base is equipped with the infrared emitter of a cover, and the infrared light that the information that outside line is transmitted is modulated to a certain frequency is launched allows mobile phone receive; Simultaneously, base has the infrared receiving device of another frequency of cover again, after the letter that the mobile phone emission is next is suffered from the infrared light demodulation, sends by outside line.Mobile phone is corresponding to be equipped with the infrared emitter of the cover signal that the signal that sends and cell-phone receiver receive that will dial and to be modulated into and the identical infrared light of base infrared receiving device receive frequency, and launches and allow the base reception; Simultaneously, mobile phone is equipped with a cover again and receives frequency and the identical infrared receiving device of base infrared launcher tranmitting frequency, the infrared light furnishing voice telecommunication of the various information that base is launched number.
The infrared receiving device of base and mobile phone mainly is made up of infrared receiving tube, frequency-selecting High Amplifier Circuit, frequency conversion intermediate level frequency discrimination circuit etc., the output of infrared receiving tube links to each other with the input of frequency-selecting High Amplifier Circuit, the speed output of High Amplifier Circuit frequently links to each other with frequency conversion intermediate level frequency discrimination circuit input end, and the output of frequency conversion intermediate level frequency discrimination circuit links to each other with cell-phone receiver or telephone interface.
The infrared launcher of base and mobile phone mainly is made up of FM modulation circuit, power amplifier, infrared transmitting tube etc., the output of FM modulation circuit links to each other with the input of power amplifier, the output of power amplifier links to each other with the input of infrared transmitting tube, and the input of FM modulation circuit and mobile phone microphone and dial-up circuit or telephone interface link to each other.
The reception and the dispensing device of one road power line carrier signal also are housed on the base, transducer also is housed on power line simultaneously.The base receiving unit is coupled by power supply, and frequency-selecting is amplified, and adder circuit, frequency conversion intermediate level frequency discrimination and telephone line interface circuit are formed; It sends part and is made up of telephone line interface, FM modulation and ringing circuit, power amplifier, power supply coupling.Transducer is equipped with the reception and the emitter of power line carrier signal, and radiating portion is coupled by power supply, and frequency-selecting High Amplifier Circuit, power amplifier, ringing circuit, infrared transmitting tube are formed; Its receiving unit is made up of infrared receiving tube, selective frequency amplifier circuit, power amplifier, power supply coupling.Base is communicated with by power line carrier with transducer, be that base is passed to external signal transducer and sent to mobile phone by power line carrier, transducer is passed to base with mobile phone signal by power line carrier, and transducer is identical with the operating handset mode with operating handset mode heel seat machine.
Because the cordless telephone that the utility model proposes adopts the infrared light duplex frequency division work that goes into operation, realized the function of cordless telephone mobile call among a small circle, simultaneously, infrared light can not penetrate veils such as body of wall, the more secret and safe of conversing; Can realize the not function of use of mobile phone and base between the chummery again by transducer in addition.
Below in conjunction with embodiment and accompanying drawing the utility model is further described:
Fig. 1 is the base of the utility model embodiment and the electric functional-block diagram of mobile phone.
Fig. 2 is the electric functional-block diagram of the transducer of the utility model embodiment.
Fig. 3 is the electrical schematic diagram of the mobile phone of the utility model embodiment.
Fig. 4 is the electrical schematic diagram of the base of the utility model embodiment.
Fig. 5 is the electrical schematic diagram of the transducer of the utility model embodiment.
The infrared transmission cordless telephone that present embodiment proposes is made of mobile phone and base and additional inverter.
1, mobile phone part:
With reference to Fig. 1, mobile phone is made up of receiving unit and radiating portion.Receiving unit is made up of infrared receiving tube, frequency-selecting High Amplifier Circuit, frequency conversion intermediate level frequency discrimination circuit and output circuit (cell-phone receiver) etc.; The output of infrared receiving tube links to each other with the input of frequency-selecting High Amplifier Circuit, the output of frequency-selecting High Amplifier Circuit is received frequency conversion intermediate level frequency discrimination circuit, and output is sent into cell-phone receiver through buffer circuit.Radiating portion is made up of mobile phone microphone, dial-up circuit, adder circuit, modulation circuit, power amplifier and infrared transmitting tube; The output of FM modulation circuit links to each other with the input of power amplifier, and the output of power amplifier links to each other with the input of infrared transmitting tube, and the input of FM modulation circuit and mobile phone microphone and dial-up circuit or telephone interface link to each other.
With reference to Fig. 3, receive the infrared CF signal that base (or transducer) emits by the D5-D7 infrared receiving tube, through the frequency selection circuit that L2, C10, C11 form, send into the frequency-selecting High Amplifier Circuit amplification that Q5 forms; R14 reduces input LC loop Q value, with widening frequency band.The Q5 amplifying signal outputs to subordinate through T1 frequency-selecting and impedance conversion.The signal of Gao Fanghou through T1 send into IC:LM3361 carry out frequency conversion, in put, frequency discrimination, demodulated audio signal output, the output signal of LM3361 promotes the cell-phone receiver sounding through the emitter follower output that Q4 forms.
Radiating circuit is made up of LM4046 and external application circuit thereof, and LM4046 is connected into voltage controlled oscillator, when 9 pin of being sent into LM4046 by the signal of microphone MIC input after Q3 amplifies, finishes the frequency-modulating process of signal.The power amplifier amplification promotion D2-D4 infrared transmitting tube that Q1, Q2 form is sent in the voltage controlled oscillator output of LM4046, and signal is outputed in the air.
In addition, the pilot oscillator of being made up of Q7 produces a high audio signal, is coupled to 4046 through C5, R23, and its work is controlled by pulse dialing.
KS58006 forms dial-up circuit and switch control.
When SW1 was allocated to out, the Q6 conducting made U1 the 5th pin current potential step-down work.Double-audio signal is also by Q3 coupling output when working in the voice-frequency dialing mode.When working in pulse dialing method, then, pulse modulation is launched on CF signal by the conducting of 14 foot control system Q8.
2, base part
With reference to Fig. 1, base is made up of receiving unit and radiating portion, and its radiating portion is made up of telephone line interface, ringing circuit, FM modulation, power amplifier and power supply coupling; The output of FM modulation circuit links to each other with the input of power amplifier, and the output of power amplifier links to each other with the input of infrared transmitting tube, and the input of FM modulation circuit links to each other with telephone interface.Its receiving unit is by putting in infrared receiving tube, frequency-selecting amplification, adder circuit, the frequency conversion and circuit such as frequency discrimination, telephone line interface is formed; The output of infrared receiving tube links to each other with the input of frequency-selecting High Amplifier Circuit, and the output of frequency-selecting High Amplifier Circuit is received frequency conversion intermediate level frequency discrimination circuit through adder, and the output of frequency conversion intermediate level frequency discrimination circuit is sent into outside line through telephone interface.In addition, the signal of being sent here through the power supply coupling circuit by power line is also delivered to the demodulation of frequency conversion intermediate level frequency discrimination circuit input end through adder.
With reference to Fig. 4, the high intermediate-frequency circuit of receiving circuit is identical with mobile phone.
Divide three the tunnel, the one tunnel to output to two or four lines of being made up of Q4 and outer telegram in reply road and change which couple to telephone wire through the signal of LM3361 output, the one tunnel through 3361 amplification rectifications, send into 3361 quiet control end, finish the machine of the putting forward function of base.Last road signal is sent into the pilot reception circuit that LM567 forms, to demodulate the pulse signal of mobile phone.
The telephone interface circuit is identical with general telephone set.
The transtation mission circuit of base is identical with the transtation mission circuit of mobile phone.
3, transducer
With reference to Fig. 2, transducer is by forming with the infrared receiving/transmission circuit and the carrier transmitting-receiving circuit of the identical transmitting-receiving frequency of base.
With reference to Fig. 5, the infrared emission of transducer and the principle of reception are all identical with mobile phone, base.
In the infrared transmission cordless telephone of the utility model implementation process, except infrared sending and receiving with duplexing frequency division go into operation do, sinusoidal wave emission is adopted in emission, receives to adopt the high sensitivity narrow-band reception.Common infrared emission for improving its transmitting power, adopts the burst pulse modulate emission, though transmitting power improves like this, its harmonic components increases, and is easy to cause the emission of this machine like this, this machine is received the harmonic components that it reflects again, causes the sending and receiving interference and cisco unity malfunction.Now adopt sinusoidal wave emission, few harmonic wave composition is used the high sensitivity narrow-band reception then, just can not cause sending and receiving to disturb, and guarantees the machine operate as normal.
Claims (3)
1, a kind of infrared transmission cordless telephone is made of mobile phone and base, it is characterized in that: base is equipped with the infrared receiving device of an infrared emitter of cover and a cover different frequency; A corresponding infrared emitter of cover and the cover infrared receiving device of being equipped with of mobile phone.
2, infrared transmission cordless telephone according to claim 1, it is characterized in that: the infrared receiving device of base and mobile phone mainly is made up of infrared receiving tube, frequency-selecting High Amplifier Circuit, frequency conversion intermediate level frequency discrimination circuit etc., the output of infrared receiving tube links to each other with the input of frequency-selecting High Amplifier Circuit, the output of frequency-selecting High Amplifier Circuit links to each other with the input of frequency conversion intermediate level frequency discrimination circuit, and the output of frequency conversion intermediate level frequency discrimination circuit links to each other with cell-phone receiver or telephone interface; The infrared launcher of base and mobile phone mainly is made up of FM modulation circuit, power amplifier, infrared transmitting tube etc., the output of FM modulation circuit links to each other with the input of power amplifier, the output of power amplifier links to each other with the input of infrared transmitting tube, and the input of FM modulation circuit and mobile phone microphone and dial-up circuit or telephone interface link to each other.
3, infrared transmission cordless telephone according to claim 1, it is characterized in that: reception and dispensing device that one road power line carrier signal also is housed on the base, simultaneously transducer is housed also on corresponding power line, the reception of base is communicated with by power line carrier with transducer with dispensing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95216524U CN2253895Y (en) | 1995-07-05 | 1995-07-05 | infrared ray transmission wireless telephone set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95216524U CN2253895Y (en) | 1995-07-05 | 1995-07-05 | infrared ray transmission wireless telephone set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2253895Y true CN2253895Y (en) | 1997-05-07 |
Family
ID=33865594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95216524U Expired - Fee Related CN2253895Y (en) | 1995-07-05 | 1995-07-05 | infrared ray transmission wireless telephone set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2253895Y (en) |
-
1995
- 1995-07-05 CN CN95216524U patent/CN2253895Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |