CN2280396Y - Microphone with or without wire - Google Patents
Microphone with or without wire Download PDFInfo
- Publication number
- CN2280396Y CN2280396Y CN 96250704 CN96250704U CN2280396Y CN 2280396 Y CN2280396 Y CN 2280396Y CN 96250704 CN96250704 CN 96250704 CN 96250704 U CN96250704 U CN 96250704U CN 2280396 Y CN2280396 Y CN 2280396Y
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- unit
- wire
- microphone
- wireless
- input
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- Expired - Fee Related
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Abstract
The utility model relates to a microphone with or without a wire, which comprises a moving coil sensor and an antenna. A power supply transform unit is connected with every function unit; the outputs of an amplifying unit and a frequency modulation unit are connected with the input of a high-frequency oscillation unit; the input of a tuning amplifying unit is connected with the output of the high-frequency oscillation unit, and the output of the tuning amplifying unit is connected with the antenna. A combined switch is respectively connected with the moving coil type sensor, a socket, a battery, the input of the amplifying unit and the power supply transform unit. The utility model separates functions at all levels in a circuit structure, and thus the functions are mutually uncorrelated. The utility model has the advantages of moderate sensitivity, good frequency response, clear sound quality and stable transmission.
Description
The dual-purpose microphone of a kind of wire and wireless relates to the circuit that is used for transducer.
Chinese patent has been announced a kind of " reverberation Microphone for karaoke " for No. 92218907.2, comprise in microphone housing, the microphone housing and adorn transaudient device, and add the time-delay reverberation circuit, transaudient device is sent into time-delay reverberation circuit processing output after changing the voice signal that receives into the signal of telecommunication, and the microphone housing is equipped with adjusting device outward.But packed battery or add band radio-frequency transmissions circuit in the tube of living.When can making user's hand take microphone to sing, this microphone oneself regulates music effect at any time.
The purpose of this utility model provides the dual-purpose microphone of a kind of wire and wireless, and it has functional separations at different levels, mutually the characteristics that do not pin down.
The purpose of utility model is achieved in that the dual-purpose microphone of this Wireless-wire includes moving-coil transducer and antenna, is characterized in that power conversion unit and each functional unit join, and amplifying unit and frequency modulation unit output connect the high frequency oscillation unit input; Tuning amplifying unit input connects high frequency oscillation unit output, and output connects antenna; Unit switch joins with moving coil pickoff, socket, battery, amplifying unit input and power conversion unit respectively.
Stir unit switch, can make this microphone wired, wireless and close three kinds of state exchanges.When being in cable status, dump, the moving coil pickoff plug joins plug and sound equipment microphone input jack by cable; When being in wireless status, moving coil pickoff and amplifying unit input are joined, battery and power conversion unit join, and make signal through amplification, frequency modulation(FM), tuning amplification, be that 90～100MHZ is adjustable, thereby can be received by FM receiver by antenna emission, tranmitting frequency at last.
Be raising transmission of wireless signals quality, or make the stereo set that is provided with FM receiver also can receive FM signal, this microphone also includes the FM reception part that is made of FM reception integrated package and peripheral cell.The FM reception integrated package preferably selects TDA7021T.
The utility model with functional separations at different levels, does not pin down on circuit structure mutually, has guaranteed the stability of performance.It is moderate to have sensitivity, and frequency response is good, sound clarity, the stable advantage of emission.
The concrete structure of utility model is provided by following embodiment and accompanying drawing thereof:
The wire and wireless microphone circuit block diagram that Fig. 1 the utility model proposes for foundation;
The wire and wireless microphone circuit schematic diagram that Fig. 2 the utility model proposes for foundation;
Fig. 3 is the circuit theory diagrams according to the special-purpose FM reception part of the wire and wireless microphone that the utility model proposes.
Below in conjunction with drawings and Examples the wire and wireless microphone that foundation the utility model proposes is described further.
Referring to Fig. 1 and Fig. 2, form power conversion unit by triode Q7, Q8, diode D3, voltage-stabiliser tube DW and inductance T2 etc.When unit switch KB got to wireless shelves, the voltage of 1.5V battery was added on the power conversion unit, made the dc voltage conversion of 1.5V become the 3V burning voltage to use for each functional unit.Form the complementary type amplifying unit by triode Q4～Q6 etc., the signal after the amplification is coupled to frequency modulation unit through capacitor C E1.The audio signal that is converted to by moving coil pickoff M is added to the amplifying unit input behind inductance L 1, capacitor C E2 and C19 and R16.Triode Q3, inductance T1, capacitor C 8～C10 and C20 constitute high frequency oscillation unit, and wherein inductance T1 is preferably controllable impedance, so that the carrier frequency frequency is adjustable in 90～100MHZ scope.Diode D1, D2, D5 etc. constitute the variable capacitance diode frequency modulation unit.Higher-order of oscillation frequency is also changed along with audio signal changes, thereby realize frequency modulation function.Triode Q1, Q2 capacitor C 3, C5, inductance L 3, L4 etc. constitute the collector electrode stagger-tuned amplifier.And composition aerial networks such as capacitor C 3, C1, C17, inductance L 5, L6 are launched the frequency-modulated wave after the tuning amplification.
To wired operating state, stir then power conversion unit dead electricity of unit switch, moving coil pickoff is received on the socket, can be from direct output audio signal on the socket.
The FM reception part is made up of FM reception integrated package TDA7021T and peripheral cell.Referring to Fig. 3, the FM signal that antenna receives is added to 12 pin of IC through capacitor C 1, and 13 pin of IC then connect antenna through inductance L 1 and capacitor C 1.Be connected between 11 pin of IC and 12 pin and be connected to capacitor C 7,4 pin between capacitor C 5,7 pin and 8 pin and connect power supply, 3 pin ground connection, 2 foot meridian capacitor C15 connect positive source, and 1 foot meridian capacitor C16 connects positive source.5 pin of IC, inductance L 2, capacitor C 11～C13 constitute local oscillation circuit, through the inner mixing of IC, in put, after phase detection, audio frequency amplify, output to plug at 14 pin.The 15 foot meridian capacitor C2 ground connection of IC, 16 foot meridian capacitor C14, resistance R 1 back plug.
This FM reception part preferably is provided with the noise elimination unit, and promptly 9 pin of IC connect the base stage of triode BG after resistance R 3.The grounded emitter of BG, collector electrode connect 8 pin of IC after capacitor C 6, when antenna end did not have input signal, 9 pin of IC were high level, make the BG conducting, and 8 pin exchange ground connection, the output of 14 pin noiselessnesss.When antenna end had signal, 9 pin of IC were low level, and BG ends, and the work of IC closed loop realizes squelch control.
Claims (4)
1. the dual-purpose microphone of Wireless-wire includes moving-coil transducer, antenna, it is characterized in that power conversion unit and each functional unit join, and amplifying unit and frequency modulation unit output connect the high frequency oscillation unit input; Tuning amplifying unit input connects high frequency oscillation unit output, and its output connects antenna, and unit switch joins with moving coil pickoff, socket, battery, amplifying unit input and power conversion unit respectively.
2. the dual-purpose microphone of wire and wireless according to claim 1 is characterized in that also including the modulation receiving unit, and the FM reception part receives integrated package by high frequency and peripheral cell constitutes.
3. as the dual-purpose microphone of wire and wireless as described in the claim 2, the model that it is characterized in that the FM reception integrated package is TDA7021T.
4. as the dual-purpose microphone of wire and wireless as described in the claim 2, it is characterized in that FM reception partly is connected to the noise elimination unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96250704 CN2280396Y (en) | 1996-12-16 | 1996-12-16 | Microphone with or without wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96250704 CN2280396Y (en) | 1996-12-16 | 1996-12-16 | Microphone with or without wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2280396Y true CN2280396Y (en) | 1998-04-29 |
Family
ID=33921411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96250704 Expired - Fee Related CN2280396Y (en) | 1996-12-16 | 1996-12-16 | Microphone with or without wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2280396Y (en) |
-
1996
- 1996-12-16 CN CN 96250704 patent/CN2280396Y/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 |