CN2237904Y - Wireless ear piece for TV set - Google Patents
Wireless ear piece for TV set Download PDFInfo
- Publication number
- CN2237904Y CN2237904Y CN 95225462 CN95225462U CN2237904Y CN 2237904 Y CN2237904 Y CN 2237904Y CN 95225462 CN95225462 CN 95225462 CN 95225462 U CN95225462 U CN 95225462U CN 2237904 Y CN2237904 Y CN 2237904Y
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- China
- Prior art keywords
- resistance
- capacitor
- high frequency
- audio signal
- super high
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- Expired - Fee Related
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- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The utility model belongs to an antenna earphone of a telephone set, comprising a transmitting device and a receiving device. The transmitting device comprises a base, an antenna arranged on the base, a plug matched with the earphone jack of the telephone set, a power supply and an audio signal modulation circuit. The audio signal modulation circuit is arranged on the base, the input terminal is connected with the plug, and the output terminal is connected with the antenna. The power supply supplies power for the audio signal modulation circuit; the receiving device is composed of an earphone and a receiver, and the receiver is an FM receiver. The utility model can make television audiences not be limited by distance and number of people through the wireless earphone. The fixing device has the advantages of simple structure, high cost performance ratio, convenient use and no interference to the outside world.
Description
The utility model belongs to a kind of wireless headset of television set.
At present TV programme is rich and varied, all want to appreciate TV programme after tired one day people go home, but child's study needs a quiet environment again, and this has become a big contradiction of Modern Family.And television set is towards high-power now, and the direction of mega bass develops, and closes small volume, still influences other people study and rest.If use the wired earphone of existing television set, can only be used by a people, and wear earphone and see TV, because the line length of earphone is limited, beholder's position and distance are restricted, and use inconvenient.
The purpose of this utility model is to address the above problem, and provides a kind of easy to use, simple in structure, number, the unrestricted television set wireless headset in position.
The emitter of television set wireless headset of the present utility model includes base, be positioned on antenna on the base, match with the television set earphone jack plug, power supply and audio signal modulation circuit, the audio signal modulation circuit is located on the base, its input plug, output termination antenna, power supply is the power supply of audio signal modulation circuit.
The receiving system of the utility model television set wireless headset is made of earphone and receiver, and receiver is a fremodyne.
The utility model is simple in structure, the performance cost is than high, and is easy to use, and number of users, position are unrestricted, noiseless to external world.
Fig. 1 is the utility model embodiment one emitter structural representation;
Fig. 2 is embodiment one a receiving system structural representation;
Fig. 3 is embodiment one circuit diagram;
Fig. 4 is the utility model embodiment two circuit diagrams;
Fig. 5 is the utility model embodiment three-circuit figure.
Below in conjunction with accompanying drawing the utility model is further described.
Embodiment one.As shown in Figure 1, the emitter of television set wireless headset of the present utility model includes base 2, be positioned on antenna Y on the base, match with the television set earphone jack plug 4, power supply 3 and audio signal modulation circuit 1, audio signal modulation circuit 1 is located on the base 2, its input plug 4, output termination antenna Y, power supply 3 are 1 power supply of audio signal modulation circuit.As shown in Figure 2, the receiving system of television set wireless headset is made of earphone 6 and receiver 5, and receiver 5 is a fremodyne.
When plug 4 is connect the television set earphone jack, power supply 3 is switched on, and audio signal is carried out frequency modulation(FM) by 1 pair of carrier frequency of audio signal modulation circuit, FM signal is launched by antenna Y, receive by fremodyne 5, by earphone 6 be sent to pleasant in, realize that wireless headset receives.
As shown in Figure 3, the audio signal modulation circuit capacitive feedback type ultra-high frequency generator that to be super high frequency tube Q1 form with inductance L 1 and capacitor C 3, C4 and peripheral circuit.Cross-over connection capacitor C 4 between the collector and emitter of super high frequency tube Q1, capacitor C 3 and inductance L 1 that the collector series connection of super high frequency tube Q1 has and connects, the collector electrode of super high frequency tube Q1 meets antenna Y by capacitor C 5, be connected to resistance R 1, R3, the R4 of serial connection on the base stage of super high frequency tube Q1, resistance R 3, the last cross-over connection of R4 have capacitor C 1, cross-over connection has capacitor C 2 on the resistance R 4, the common point of resistance R 3, R4 connects the positive pole of power supply E, the emitter warp of super high frequency tube Q1 and resistance R 5 and capacitor C 6 ground connection that connect, resistance R 1 is an audio signal input end.
As shown in Figure 3, be connected to resistance R 2 on ground wire, left channel signals is added in the base stage of super high frequency tube Q1 through resistance R 1, capacitor C 1, and right-channel signals is added on the base stage of super high frequency tube Q1 through resistance R 2, power supply E, capacitor C 2.On resistance R 2, be serially connected with K switch 1.When mains switch K2 is closed, left channel signals is by behind the R1, be added to through C1 on the base stage of Q1, right-channel signals is through R2, through power supply E (for alternating current circuit, the voltage source short circuit, current source open circuit), C2 is added on the base stage of Q1, adds together with left channel signals, form left and right sound channels and signal, with signal the junction capacitance of Q1 is changed with audio frequency, thereby cause the change of frequency of oscillation, finally realize the purpose of frequency modulation, FM signal is launched by antenna Y, and, finish the function of wireless headset by the receiving system reception.
Be the dual track reception because K switch 1 is closed, open and be monophony, can adapt to the television set of different sound accompaniment effects, and right-channel signals has realized the compound and frequency modulation of stereophonic signal directly from the ground wire introducing with very low cost.And the audio signal modulation circuit is the hyperfrequency modulation circuit, and is noiseless to external world.
As shown in Figure 1, antenna Y can be telescopic structure, also can be stationary structure.As shown in Figure 2, earphone 6 is a stereophone.
Embodiment two.As shown in Figure 4, resistance R 1, the R2 of the utility model audio signal modulation circuit are adjustable resistance, on it respectively and be connected to capacitor C 7, C8.R1 and R2 can adjust left and right sides balance.Other structure of present embodiment is identical with embodiment one with operation principle.
Embodiment three.As shown in Figure 5, the capacitive feedback type ultra-high frequency generator that the utility model audio signal modulation circuit super high frequency tube Q1 and inductance L 1 and capacitor C 3, C4 and peripheral circuit R1, R3, R4, C1, C2 form, it is a typical circuit.Present embodiment also can be the same with embodiment one, adds resistance R 2, realizes that the dual track emission receives, and other structure of present embodiment is identical with embodiment one.
Claims (8)
1, a kind of emitter of television set wireless headset, the plug, power supply and the audio signal modulation circuit that it is characterized in that including base, be positioned on antenna on the base, match with the television set earphone jack, the audio signal modulation circuit is located on the base, its input plug, output termination antenna, power supply is the power supply of audio signal modulation circuit.
2, emitter according to claim 1 is characterized in that the audio signal modulation circuit capacitive feedback type ultra-high frequency generator that to be super high frequency tube Q1 form with inductance L 1 and capacitor C 3, C4 and peripheral circuit.
3, emitter according to claim 2, it is characterized in that cross-over connection capacitor C 4 between the collector and emitter of super high frequency tube Q1, capacitor C 3 and inductance L 1 that the collector series connection of super high frequency tube Q1 has and connects, the collector electrode of super high frequency tube Q1 meets antenna Y by capacitor C 5, be serially connected with resistance R 1 on the base stage of super high frequency tube Q1, R3, R4, resistance R 3, the last cross-over connection of R4 has capacitor C 1, cross-over connection has capacitor C 2 on the resistance R 4, resistance R 3, the common point of R4 connects the positive pole of power supply E, the emitter warp of super high frequency tube Q1 and resistance R 5 and capacitor C 6 ground connection that connect, resistance R 1 is an audio signal input end.
4, according to claim 2 or 3 described emitters, it is characterized in that on ground wire, being connected to resistance R 2, left channel signals is added on the base stage of super high frequency tube Q1 through resistance R 1, capacitor C 1, and right-channel signals is added on the base stage of super high frequency tube Q1 through resistance R 2, power supply E, capacitor C 2.
5, emitter according to claim 4 is characterized in that being serially connected with switch on resistance R 2.
6, emitter according to claim 5 is characterized in that resistance R 1, R2 are adjustable resistance, on it respectively and be connected to electric capacity.
7, a kind of receiving system of television set wireless headset is characterized in that it is made of earphone and receiver, and receiver is a fremodyne.
8, receiving system according to claim 7 is characterized in that earphone is a stereophone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95225462 CN2237904Y (en) | 1995-11-08 | 1995-11-08 | Wireless ear piece for TV set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95225462 CN2237904Y (en) | 1995-11-08 | 1995-11-08 | Wireless ear piece for TV set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2237904Y true CN2237904Y (en) | 1996-10-16 |
Family
ID=33871920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95225462 Expired - Fee Related CN2237904Y (en) | 1995-11-08 | 1995-11-08 | Wireless ear piece for TV set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2237904Y (en) |
-
1995
- 1995-11-08 CN CN 95225462 patent/CN2237904Y/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 |