CN2096168U - Radio receiver for tv sound - Google Patents
Radio receiver for tv sound Download PDFInfo
- Publication number
- CN2096168U CN2096168U CN91213114.4U CN91213114U CN2096168U CN 2096168 U CN2096168 U CN 2096168U CN 91213114 U CN91213114 U CN 91213114U CN 2096168 U CN2096168 U CN 2096168U
- Authority
- CN
- China
- Prior art keywords
- amplifier
- emitter
- signal
- induction coil
- receiver
- 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.)
- Withdrawn
Links
- 230000006698 induction Effects 0.000 claims abstract description 8
- 230000003321 amplification Effects 0.000 claims description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 11
- 230000032258 transport Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 230000001939 inductive effect Effects 0.000 claims 1
- 239000004020 conductor Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
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- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The utility model relates to a radio receiver for a TV sound, which comprises a transmitting device outputted by a pick-up jack and a receiving apparatus comprising a miniature loudspeaker. The transmitting device is connected with transmitting conductors via a matching impedance. The receiving device passes through induction coils and couples electromagnetic signals, and the induction coil signal is transferred to a front-level signal amplifier, a band pass amplifier; the power amplifier is transferred to the loudspeaker. The utility model has the advantages of simple structure, low cost, and reliable use.
Description
The utility model relates to the making of the wireless receiver of television acoustics.
The wireless transmission of existing television acoustics and reception, be particularly useful for the following design of the normal employing of radio receiver of television field frame: a kind of is radio wave modulate emission and demodulate reception, another kind of is modulation of infrared rays emission and demodulate reception.Above-mentioned two kinds of devices all need modulate emission device and additional power source (the television set internal electric source can not directly utilize), and receiver needs the frequency-selecting demodulator circuit.And infrared ray very easily blocks, as long as light path is obstructed, sound interrupts immediately.In addition, these two kinds of apparatus structure complexity, cost is up to tens of units.Signal interfered with each other when radio wave modulate emission and receiving system caused adjacent use easily.
The utility model purpose is in order to overcome the deficiency of said apparatus, makes low, simple in structure, easy to use and reliable, the glitch-free wireless receiver again of a kind of cost, is particularly useful for television set supporting.
Technical solution of the present utility model is: the own audio power that utilizes television acoustics equipment, transport to emitter, from the output of pickup jack through a matched impedance after sending and receiving penetrate lead, receiving system is process induction coil coupling audio electromagnetic signal, the induction coil signal is transported to the prime signal amplifier, and through transporting to the loud speaker pronunciation behind bandpass amplifier and the power amplifier.One pre-amplifier and bandpass amplifier constitute in negative feedback amplification mode by operational amplifier.One-level prime bandpass amplifier is a minimum amplifying stage of realizing that signal amplifies, can increase the one-level prime or be with logical the amplification when time a little less than the coupling input signal.The matched impedance of emitter be a small resistor or again with resistance and di-electric capacity.The emission lead picks out several meters and gets final product.
The utility model is realized the application of audio-electromagnetically induction on wireless receiver, emission and receiving system have been simplified greatly, logical amplification makes and exports enough sound clearly through enough bands, do not need frequency-selecting and demodulator circuit, cost of manufacture is greatly reduced, because the audio frequency magnetic field frequency is low, decay is fast, can not produce with near same apparatus to interfere with each other.During with the TV adapted, the output of television set voiceless sound wants the listening person to open receiver, listens to by earphone.Also can be used for sound equipment, radio-cassette player.
The utility model is described in further detail by embodiment below in conjunction with accompanying drawing:
Fig. 1 is the utility model block diagram.Fig. 2 is the utility model line assumption diagram.
Fig. 1 has provided basic structure, and audio frequency transmits and receives through induced signal, transports to the loud speaker sounding behind amplification and power amplifier.Wherein amplifier section comprises that prime is amplified and the logical amplification of band.
Earphone jack E transports to the emission lead by the electric capacity of a resistance and a parallel connection among Fig. 2, and the resistance of resistance is looked own output impedance certainly at 4 Ω to 8 Ω.The emission lead is in indoor layout, puts all around wall for well with ring, and induction coil B around 300 to 1000 circles, is the induced signal that strengthens reception with φ 0.15 line footpath, the built-in soft magnetic core amplifier of coil A
1Be pre-amplifier, connect a capacitor C between signal input part and the ground
1, its capacity is generally got about 100～500P, is used for the elimination high-frequency signal.BG
1, BG
2Constitute power amplifier, its output termination loud speaker connects on the machine more than an earphone if make power amplifier make the power amplifier of little output impedance then can receive only one, is used for two people or more people use same set of receiver.The electric capacity in parallel with emission resistance is 100P.
Amplifying circuit and power amplification are custom circuit, and important parameter all provides in the drawings.In addition, can adopt to have the integrated circuit that the prime amplification adds the logical amplification of band, also can adopt the prime amplification to add and be with logical amplification to add the integrated circuit of power amplifier again--be that two stage amplifer adds the one-level power amplifier.
Receiving circuit can be placed in the capsule, also can with the integrated arrangement of headphone.
Claims (5)
1, a kind of television acoustics wireless receiver, by from the emitter of pickup jack output and comprise that the receiving system of miniature loudspeaker forms, it is characterized in that emitter is to launching lead through a matched impedance, receiving system is process induction coil coupling audio electromagnetic signal, and the induction coil signal transports to prime signal amplifier bandpass amplifier and power amplifier is transported to the loud speaker pronunciation.
2,, it is characterized in that prime signal amplifier, bandpass amplifier constitute in negative feedback amplification mode by operational amplifier by the described receiver of claim 1.
3,, it is characterized in that the electric capacity of in parallel-100P-500P between prime signal amplifier input and the ground by the described receiver of claim 2.
4, by claim 1 or 2 described receivers, it is characterized in that number of inductive coil turns is 300～1000 circles, can internal magnetic core in the coil.
5,, it is characterized in that emitter is that the electric capacity of the resistance of series connection 4 Ω to 8 Ω and a 100P in parallel is in the emission lead by the described receiver of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91213114.4U CN2096168U (en) | 1991-01-24 | 1991-01-24 | Radio receiver for tv sound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91213114.4U CN2096168U (en) | 1991-01-24 | 1991-01-24 | Radio receiver for tv sound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2096168U true CN2096168U (en) | 1992-02-12 |
Family
ID=4921530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91213114.4U Withdrawn CN2096168U (en) | 1991-01-24 | 1991-01-24 | Radio receiver for tv sound |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2096168U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103188588A (en) * | 2013-03-06 | 2013-07-03 | 黄桂芳 | Mobile phone sound-amplifying player with magnetic induction way |
| CN103428592A (en) * | 2012-05-21 | 2013-12-04 | 张伟斌 | Sound amplifying device |
| WO2013185524A1 (en) * | 2012-06-15 | 2013-12-19 | 威立达数码科技(深圳)有限公司 | Magnetic induction audio equipment |
-
1991
- 1991-01-24 CN CN91213114.4U patent/CN2096168U/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103428592A (en) * | 2012-05-21 | 2013-12-04 | 张伟斌 | Sound amplifying device |
| WO2013185524A1 (en) * | 2012-06-15 | 2013-12-19 | 威立达数码科技(深圳)有限公司 | Magnetic induction audio equipment |
| CN103188588A (en) * | 2013-03-06 | 2013-07-03 | 黄桂芳 | Mobile phone sound-amplifying player with magnetic induction way |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |