CN203761336U - Satellite audio signal amplification circuit - Google Patents
Satellite audio signal amplification circuit Download PDFInfo
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- CN203761336U CN203761336U CN201420124569.4U CN201420124569U CN203761336U CN 203761336 U CN203761336 U CN 203761336U CN 201420124569 U CN201420124569 U CN 201420124569U CN 203761336 U CN203761336 U CN 203761336U
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- transformer
- diode
- npn triode
- capacitor
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Abstract
The utility model provides a satellite audio signal amplification circuit. The satellite audio signal amplification circuit comprises a transformer, an NPN triode and an adjustable inductor. One end of the primary side of the transformer is connected with an antenna coil. The other end of the primary side of the transformer is connected with the positive electrode of a power source. A capacitor C1 and a capacitor C2 are connected to the primary side of the transformer in parallel. The negative electrode of the power source is connected with the negative electrode of a pair of earphones through a resistor R2. One end of the auxiliary side of the transformer is connected to the negative electrode of the pair of earphones through a resistor R1. The other end of the auxiliary side of the transformer is connected with the base electrode of the NPN triode. The collector electrode of the NPN triode is connected with the positive electrode of the pair of earphones through the adjustable inductor. The emitting electrode of the NPN triode is further connected with a diode D1 and a diode D2. The positive electrode of the diode D1 is connected with the emitting electrode of the NPN triode. The negative electrode of the diode D2 is connected with the positive electrode of the diode D2. The negative electrode of the diode D2 is connected to the public end of the auxiliary side of the transformer and the resistor R2. The emitting electrode of the NPN triode is further grounded through a wire. By the adoption of the satellite audio signal amplification circuit, high-frequency signals among satellite audio signals can be effectively filtered out, and the audio effect is good.
Description
Technical field
The utility model relates to a kind of satellite amplifier circuit for sound frequency signal, belongs to electricity field.
Background technology
Satellite audio signal is generally to adopt low frequency signal to propagate, in the satellite audio signal of low frequency doped with the interference signal of many high frequencies, these interference signals not only may make audio frequency effect reduce, and people cannot correctly not heard, and audio frequency is desultory imperfect, distortion is large, export unstablely, also may occur some noises and directly noiseless, therefore, satellite audio signal need to be by the interference signal filtering of some high frequencies, to improve audio quality.
Utility model content
The utility model provides a kind of satellite amplifier circuit for sound frequency signal, has solved that circuit signal distortion is in the past serious, the effective problem of filtering high-frequency interferencing signal.
For solving above-mentioned technical problem, the utility model is by the following technical solutions: a kind of satellite amplifier circuit for sound frequency signal, comprise transformer L1, NPN triode Q and controllable impedance L2, one end, former limit of transformer L1 connects aerial coil T, the former limit other end of described transformer L1 connects the positive pole of power supply E, capacitor C 1 and capacitor C 2 are connected in parallel on the former limit of transformer L1, the negative pole of described power supply E is by the negative pole of resistance R 2 frames connecting with headphones, secondary one end of described transformer L1 is connected to earphone negative pole by resistance R 1, the other end of described transformer L1 secondary connects the base stage of described NPN triode Q, the collector electrode of described NPN triode Q is by the positive pole of controllable impedance L2 frames connecting with headphone, the emitter of described NPN triode Q is also connected with diode D1 and diode D2, the emitter of the anodic bonding NPN triode Q of diode D1, the negative electrode of described diode D1 connects the anode of diode D2, the negative electrode of described diode D2 is connected to the common port of transformer L1 secondary and resistance R 1, the emitter of described NPN triode Q is also by wire ground connection.
The common port of described diode D1 and diode D2 is also connected with the capacitor C 3 that is connected on NPN triode Q collector electrode.
Between the common port of described transformer L1 secondary and resistance R 1 and power supply E positive pole, be also connected with capacitor C 4.
The inductance value scope of described controllable impedance L2 is 2.5-3.5 milihenry.
Compared with prior art, the beneficial effects of the utility model are: this satellite amplifier circuit for sound frequency signal of the utility model design, and the effectively high-frequency signal in filtering satellite audio signal, stable output, the distortion factor is little, and audio frequency effect is good.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
Embodiment 1
A kind of satellite amplifier circuit for sound frequency signal as shown in Figure 1, comprise transformer L1, NPN triode Q and controllable impedance L2, one end, former limit of transformer L1 connects aerial coil T, the former limit other end of described transformer L1 connects the positive pole of power supply E, capacitor C 1 and capacitor C 2 are connected in parallel on the former limit of transformer L1, the negative pole of described power supply E is by the negative pole of resistance R 2 frames connecting with headphones, secondary one end of described transformer L1 is connected to earphone negative pole by resistance R 1, the other end of described transformer L1 secondary connects the base stage of described NPN triode Q, the collector electrode of described NPN triode Q is by the positive pole of controllable impedance L2 frames connecting with headphone, the emitter of described NPN triode Q is also connected with diode D1 and diode D2, the emitter of the anodic bonding NPN triode Q of diode D1, the negative electrode of described diode D1 connects the anode of diode D2, the negative electrode of described diode D2 is connected to the common port of transformer L1 secondary and resistance R 1, the emitter of described NPN triode Q is also by wire ground connection.
In the present embodiment, triode Q can be used for reciprocal amplifying signal, aerial coil T forms with stranded conductor coiling on bar magnet, aerial coil T forms well connection resonant circuit with capacitor C 1, capacitor C 2, the radio signal that aerial coil T is received is carried out frequency-selecting, the signal of selecting senses transformer L1 by aerial coil T, by NPN triode, Q carries out signal amplification, the signal having amplified is delivered to controllable impedance L2, controllable impedance L2 effect is to utilize induction reactance to stop high-frequency signal to enter earphone, and only allows audio signal pass through, in the present embodiment, can directly regulate controllable impedance L2 regulating winding to change inductance value, thereby can adjust the frequency size of trap signal, satellite audio signal for varying environment is finely tuned filtration, ensure the process controllable impedance L2 that hard disk signal can be unobstructed, thereby can transmit audio signal, by aerial coil T and capacitor C 1, capacitor C 2 is to signal frequency-selecting, repeatedly amplify through triode Q again, finally filter by controllable impedance L2, finally send into earphone, not only effective filtering interference signals, and the distortion factor is little, stable output signal, audio frequency effect is good.
Embodiment 2
The present embodiment has increased following structure on the basis of embodiment 1: the common port of described diode D1 and diode D2 is also connected with the capacitor C 3 that is connected on NPN triode Q collector electrode.
The present embodiment capacitor C 3 can play filter action, can prevent loop concussion simultaneously, reduces signal distortion.
Embodiment 3
The present embodiment has increased following structure on the basis of embodiment 1 or embodiment 2: between the common port of described transformer L1 secondary and resistance R 1 and power supply E positive pole, be also connected with capacitor C 4.
Capacitor C 4 principles of the present embodiment are identical with capacitor C 3, reduce signal distortion, improve output signal.
Embodiment 4
Embodiment 4 is optimum embodiment of the present utility model
The present embodiment has done following optimization on the basis of above-mentioned arbitrary embodiment: the inductance value scope of described controllable impedance L2 is 2.5-3.5 milihenry.
The present embodiment is in order to make circuit can more adapt to the signal processing under varying environment, effectively filter for the high-frequency signal under varying environment, the inductance value of controllable impedance L2 is set as to 2.5-3.5 milihenry, by adjusting the inductance value of controllable impedance L2, can finely tune the high-frequency signal filtering, so that low frequency satellite-signal can be complete, unobstructed arrival earphone, reduce signal distortion, improve quality of output signals.If high-frequency signal is 500kHz, low frequency signal is 10 kHz, while controllable impedance being adjusted to 3 milihenry, controllable impedance L2 is XL=2 π × 500 × 10 3 × 3 × 10-3 ≈ 9.42 k Ω to 500kHz high-frequency signal induction reactance, and controllable impedance L2 is XL=2 π × 10 4 × 53 × 10-3 ≈ 188 Ω to 10kHz low frequency signal induction reactance, can find out to only have low frequency signal to arrive earphone by controllable impedance L2, thereby play the object of effective filtering high-frequency interferencing signal.
Be as mentioned above embodiment of the present utility model.The utility model is not limited to above-mentioned execution mode, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, within all falling into protection range of the present utility model.
Claims (4)
1. a satellite amplifier circuit for sound frequency signal, it is characterized in that: comprise transformer L1, NPN triode Q and controllable impedance L2, one end, former limit of transformer L1 connects aerial coil T, the former limit other end of described transformer L1 connects the positive pole of power supply E, capacitor C 1 and capacitor C 2 are connected in parallel on the former limit of transformer L1, the negative pole of described power supply E is by the negative pole of resistance R 2 frames connecting with headphones, secondary one end of described transformer L1 is connected to earphone negative pole by resistance R 1, the other end of described transformer L1 secondary connects the base stage of described NPN triode Q, the collector electrode of described NPN triode Q is by the positive pole of controllable impedance L2 frames connecting with headphone, the emitter of described NPN triode Q is also connected with diode D1 and diode D2, the emitter of the anodic bonding NPN triode Q of diode D1, the negative electrode of described diode D1 connects the anode of diode D2, the negative electrode of described diode D2 is connected to the common port of transformer L1 secondary and resistance R 1, the emitter of described NPN triode Q is also by wire ground connection.
2. a kind of satellite amplifier circuit for sound frequency signal according to claim 1, is characterized in that: the common port of described diode D1 and diode D2 is also connected with the capacitor C 3 that is connected on NPN triode Q collector electrode.
3. a kind of satellite amplifier circuit for sound frequency signal according to claim 1, is characterized in that: between the common port of described transformer L1 secondary and resistance R 1 and power supply E positive pole, be also connected with capacitor C 4.
4. a kind of satellite amplifier circuit for sound frequency signal according to claim 1, is characterized in that: the inductance value scope of described controllable impedance L2 is 2.5-3.5 milihenry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420124569.4U CN203761336U (en) | 2014-03-19 | 2014-03-19 | Satellite audio signal amplification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420124569.4U CN203761336U (en) | 2014-03-19 | 2014-03-19 | Satellite audio signal amplification circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203761336U true CN203761336U (en) | 2014-08-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420124569.4U Expired - Fee Related CN203761336U (en) | 2014-03-19 | 2014-03-19 | Satellite audio signal amplification circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203761336U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825560A (en) * | 2014-03-19 | 2014-05-28 | 成都引众数字设备有限公司 | Signal amplifying circuit used for satellite voice frequency |
-
2014
- 2014-03-19 CN CN201420124569.4U patent/CN203761336U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825560A (en) * | 2014-03-19 | 2014-05-28 | 成都引众数字设备有限公司 | Signal amplifying circuit used for satellite voice frequency |
| CN103825560B (en) * | 2014-03-19 | 2017-03-29 | 成都引众数字设备有限公司 | For the signal amplification circuit of satellite audio |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20150319 |
|
| EXPY | Termination of patent right or utility model |