CN2691201Y - Hish fidelity low frequency power continuous joint speaker - Google Patents
Hish fidelity low frequency power continuous joint speaker Download PDFInfo
- Publication number
- CN2691201Y CN2691201Y CN 200420048757 CN200420048757U CN2691201Y CN 2691201 Y CN2691201 Y CN 2691201Y CN 200420048757 CN200420048757 CN 200420048757 CN 200420048757 U CN200420048757 U CN 200420048757U CN 2691201 Y CN2691201 Y CN 2691201Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- low frequency
- capacitor
- utility
- model
- 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
Links
Images
Landscapes
- Amplifiers (AREA)
Abstract
The utility model relates to a high fidelity low frequency power continuous joint speaker, which comprises a loud speaker box body, a circuit board arranged in the loud speaker box body and a loudspeaker. The circuit is composed of a low frequency signal output port of a cassette player, a matching circuit, an intermediate frequency amplification circuit, a last stage amplifying circuit, a loudspeaker, etc. The utility model is characterized in that the matching circuit is formed by connecting an input port IN and the emitter electrode of a three-electrode tube VT1 though a capacitor C1. A resistor R1 and a capacitor C2 are connected in series and then connected with the base electrode of the VT1. The other end of the VT1 is connected to the ground. One end of the resistor R2 and one end of the C1 are connected with the emitter electrode of the VT1 in parallel. The other end of the resistor R2 and the C1 are connected to the ground. One end of the resistor R3 is connected with the anode of power supply and the other end of the resistor R3 is connected with the collector of the VT1. One end of the capacitor C3 is connected with the collector of the VT1 and the other end of the capacitor C3 and the R4 are connected in series and are jointed with the base electrode of the three-electrode tube VT2 in the intermediate frequency amplification circuit. The circuit construction of the utility model is reasonably matched, and the utility model has high-fidelity property, clear tonal quality and no noise. The utility model is an ideal low frequency power continued-jointed sound box of the cassette player class.
Description
Technical field
The utility model relates to a kind of electronic audio equipment, particularly a kind of low frequency power continued access audio amplifier with high-fidelity performance.
Background technology
At present, the low frequency signal of walkman (being commonly called as a walkman) class renews by the earphone output and connects signal distortion greatly behind the audio amplifier, and acoustical quality is very unsatisfactory, and its reason is that the audio amplifier circuit design does not match.At present, can adapt to low frequency signal amplification and distortionless audio amplifier on the market and find as yet, also not see the technology report that relevant detailed product is arranged.
The utility model content
The purpose of this utility model provides the low frequency power continued access audio amplifier that a kind of circuit structure coupling is reasonable, have the high-fidelity performance.
The purpose of this utility model is achieved in that it comprises sound box bodies and its interior circuit board, loud speaker is installed, circuit structure is: walkman output low frequency signal port connects match circuit, match circuit connects intermediate frequency amplifier circuit, is connected with loud speaker through a back grade amplifying circuit then; It is characterized in that: match circuit constitutes: input IN joins by the emitter of capacitor C 1 back with triode VT1; Resistance R 1 and the base stage that meets VT1 after capacitor C 2 is connected, other end ground connection; Resistance R 2 one ends and C1 one end also are attached to the emitter of VT1, other end ground connection; Resistance R 3 one termination power positive poles, the collector electrode of another termination VT1; The collector electrode of capacitor C 3 one termination VT1, the other end and the base stage that meets triode VT2 in the intermediate frequency amplifier circuit after R4 is connected in series.
The utlity model has following advantage: can carry out low frequency signal and amplify under distortionless situation, promptly audio amplifier has the high-fidelity performance, so sound clarity, no noise has remedied the blank of walkman continued access speaker products on the market, has enriched people's life.The applicant has now successfully made sample, and is very good through trial effect, is subjected to liking very much of people's welcome, particularly young people.
Description of drawings
Fig. 1 the utility model circuit structure calcspar
Fig. 2 match circuit structure chart
Embodiment
The utility model is primarily aimed at a kind of high-fidelity low frequency power continued access audio amplifier that walkman on the market (walkman) is serious by earphone jack continued access audio amplifier distortion situation, the highly undesirable Study on Problems of effect is developed.It realizes that by improving power amplification circuit board to the output of walkman earphone, the high-fidelity that is fit to any monitoring low frequency signal renews welding system.
Power amplification circuit board and loud speaker 5 after it comprises sound box bodies and its interior improvement is installed, circuit structure is: walkman output low frequency signal port 1 connects match circuit 2, match circuit 2 connects intermediate frequency amplifier circuit 3, is connected with loud speaker 5 through a back grade amplifying circuit 4 then; Be primarily characterized in that: match circuit constitutes: input IN joins by the emitter of capacitor C 1 back with triode VT1; Resistance R 1 and the base stage that meets VT1 after capacitor C 2 is connected, other end ground connection; Resistance R 2 one ends and C1 one end also are attached to the emitter of VT1, other end ground connection; Resistance R 3 one termination power positive poles, the collector electrode of another termination VT1; The collector electrode of capacitor C 3 one termination VT1, the other end and the base stage that meets triode VT2 in the intermediate frequency amplifier circuit after R4 is connected in series.Low frequency signal is transformed into intermediate-freuqncy signal through input IN behind VT1, line signal just, so played the impedance conversion effect, deliver to the base stage of VT2 then and carry out the intermediate frequency amplification, then again through after the level amplifying circuit reach loud speaker after amplifying, realize the high-fidelity transmission of signal, restore fidelity, clear noise-free good result thereby reach tonequality.
Claims (1)
1, a kind of high-fidelity low frequency power continued access audio amplifier, comprise sound box bodies and its interior circuit board, loud speaker (5) is installed, circuit structure is: walkman output low frequency signal port (1) connects match circuit (2), match circuit (2) connects intermediate frequency amplifier circuit (3), and a grade amplifying circuit (4) is connected with loud speaker (5) through the back then; It is characterized in that: match circuit constitutes: input IN joins by the emitter of capacitor C 1 back with triode VT1; Resistance R 1 and the base stage that meets VT1 after capacitor C 2 is connected, other end ground connection; Resistance R 2 one ends and C1 one end also are attached to the emitter of VT1, other end ground connection; Resistance R 3 one termination power positive poles, the collector electrode of another termination VT1; The collector electrode of capacitor C 3 one termination VT1, the other end and the base stage that meets triode VT2 in the intermediate frequency amplifier circuit after R4 is connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420048757 CN2691201Y (en) | 2004-04-05 | 2004-04-05 | Hish fidelity low frequency power continuous joint speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420048757 CN2691201Y (en) | 2004-04-05 | 2004-04-05 | Hish fidelity low frequency power continuous joint speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2691201Y true CN2691201Y (en) | 2005-04-06 |
Family
ID=34672214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420048757 Expired - Fee Related CN2691201Y (en) | 2004-04-05 | 2004-04-05 | Hish fidelity low frequency power continuous joint speaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2691201Y (en) |
-
2004
- 2004-04-05 CN CN 200420048757 patent/CN2691201Y/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201054780Y (en) | Automatic noise reduction earphone | |
| CN2817213Y (en) | Audio frequency power amplifier | |
| CN2691201Y (en) | Hish fidelity low frequency power continuous joint speaker | |
| US20080199018A1 (en) | Active earphone with multiple speakers | |
| CN102123340A (en) | High-performance hearing-aid made of discrete components | |
| CN202385278U (en) | High-performance hearing aid | |
| CN202059574U (en) | High sensitivity sound detector prepared by operational amplifiers | |
| CN206674144U (en) | A kind of multipurpose foreign language teaching Non-connecting handset audio amplifying device | |
| CN2253086Y (en) | Dual track deaf aid | |
| CN111510808A (en) | Mobile phone earphone with volume amplification function | |
| CN2449438Y (en) | Infrared audio earphone | |
| CN104618824A (en) | Wireless microphone with changeable amplitude | |
| CN204993809U (en) | Dual track audio power amplifier circuit | |
| CN212970073U (en) | High-fidelity low-cost analog hearing aid circuit | |
| CN201114684Y (en) | A transmitter | |
| CN210958287U (en) | Ku wave band power amplifier module | |
| CN202103846U (en) | High-performance hearing aid made by discrete components | |
| CN201422102Y (en) | Vehicle-mounted power amplifier circuit | |
| CN219802286U (en) | Analog sound amplifying circuit and amplifier thereof | |
| CN202652151U (en) | Novel full-balanced vacuum tube high fidelity power amplifier | |
| CN220915400U (en) | Active noise reduction earphone based on multistage amplifying circuit | |
| CN206962784U (en) | A kind of Ku wave bands power amplifier module | |
| CN202696883U (en) | Discrete component hearing aid | |
| CN203071880U (en) | Electronic tube and transistor mixed differential amplification circuit | |
| CN201118906Y (en) | Small portable T sound box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050406 |