CN204090121U - Based on the outside speaker circuit of D class power amplifier - Google Patents
Based on the outside speaker circuit of D class power amplifier Download PDFInfo
- Publication number
- CN204090121U CN204090121U CN201420218831.1U CN201420218831U CN204090121U CN 204090121 U CN204090121 U CN 204090121U CN 201420218831 U CN201420218831 U CN 201420218831U CN 204090121 U CN204090121 U CN 204090121U
- Authority
- CN
- China
- Prior art keywords
- power amplifier
- class power
- magnetic bead
- loudspeaker
- circuit
- 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
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Abstract
The utility model discloses a kind of outside speaker circuit based on D class power amplifier, it comprises microprocessor, D class power amplifier, magnetic bead L1, magnetic bead L2 and loudspeaker, the positive and negative electrode output of microprocessor connects respectively by the positive and negative electrode input of coupling capacitance C1, C2 and D class power amplifier, the positive and negative electrode output of D class power amplifier is connected with by filter capacitor C3, C4 by magnetic bead L1, magnetic bead L2 successively, and the filter circuit be made up of C3, C4 is connected with the positive and negative electrode input of loudspeaker respectively.The utility model adopts independently integrated circuit, can improve tonequality; The utility model practical D class power amplifier audio-frequency power amplifier, D class power amplifier has the advantage that efficiency is high, heat dissipation is few, greatly improves the definition of sound, meets the needs of people to outside speaker result of broadcast.
Description
Technical field
The utility model relates to a kind of outside speaker circuit, particularly a kind of outside speaker circuit based on D class power amplifier.
Background technology
Mobile phone outside speaker is generally used for call or plays the audio signals such as music, existing mobile phone industry outside speaker circuit has the following disadvantages: the power amplification of (1) traditional outside speaker is integrated on power supply IC and completes, because power supply IC has several functions, so have certain interference to the power amplifier of outside speaker.(2) do not arrange magnetic bead, anti-static effect is poor.(3) volume control circuit complex structure, cost is higher.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of outside speaker circuit based on D class power amplifier, adopts independently integrated circuit, does not have to integrate with the circuit of other functions, therefore suffered interference is less, and distortion level is low.
The purpose of this utility model is achieved through the following technical solutions: based on the outside speaker circuit of D class power amplifier, it comprises microprocessor, D class power amplifier, magnetic bead L1, magnetic bead L2 and loudspeaker, the cathode output end of microprocessor is connected with the electrode input end of D class power amplifier by coupling capacitance C1, the filter circuit that the cathode output end of D class power amplifier is consisted of with by filter capacitor C3 magnetic bead L1 is successively connected with the electrode input end of loudspeaker, the cathode output end of microprocessor is connected with the negative input of D class power amplifier by coupling capacitance C2, the filter circuit that the cathode output end of D class power amplifier is consisted of with by filter capacitor C4 magnetic bead L2 is successively connected with the negative input of loudspeaker, one end of filter capacitor C3 is connected on the points of common connection of loudspeaker electrode input end and magnetic bead L1, filter capacitor C3 other end ground connection, the other end ground connection of filter capacitor C4 on the points of common connection that one end of filter capacitor C4 is connected to loudspeaker negative input and magnetic bead L2.
The utility model also comprises volume control circuit, volume control circuit arrange and between filter circuit and loudspeaker, volume control circuit is made up of variable resistor R1 and variable resistor VR2, one end of variable resistor R1 is connected with loudspeaker negative input, one end of variable resistor R2 is connected with loudspeaker electrode input end, and the other end of variable resistor R1 and the other end of variable resistor R2 are altogether.
The beneficial effects of the utility model are:
1) adopt independently integrated circuit, do not have to integrate with the circuit of other functions, therefore suffered interference is less, distortion level is low, can improve tonequality;
2) be provided with magnetic bead, effectively can prevent electrostatic;
3) variable resistor is adopted to realize volume adjusting, greatly lower cost.
Accompanying drawing explanation
Fig. 1 is the utility model circuit structure schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail, but protection range of the present utility model is not limited to the following stated.
As shown in Figure 1, based on the outside speaker circuit of D class power amplifier, it comprises microprocessor, D class power amplifier, magnetic bead L1, magnetic bead L2 and loudspeaker, the cathode output end of microprocessor is connected with the electrode input end of D class power amplifier by coupling capacitance C1, the filter circuit that the cathode output end of D class power amplifier is consisted of with by filter capacitor C3 magnetic bead L1 is successively connected with the electrode input end of loudspeaker, the cathode output end of microprocessor is connected with the negative input of D class power amplifier by coupling capacitance C2, the filter circuit that the cathode output end of D class power amplifier is consisted of with by filter capacitor C4 magnetic bead L2 is successively connected with the negative input of loudspeaker, one end of filter capacitor C3 is connected on the points of common connection of loudspeaker electrode input end and magnetic bead L1, filter capacitor C3 other end ground connection, the other end ground connection of filter capacitor C4 on the points of common connection that one end of filter capacitor C4 is connected to loudspeaker negative input and magnetic bead L2.
Outside speaker circuit based on D class power amplifier also comprises volume control circuit, volume control circuit arrange and between filter circuit and loudspeaker, volume control circuit is made up of variable resistor R1 and variable resistor VR2, one end of variable resistor R1 is connected with loudspeaker negative input, one end of variable resistor R2 is connected with loudspeaker electrode input end, and the other end of variable resistor R1 and the other end of variable resistor R2 are altogether.
The course of work of the present utility model is as follows: HPH_LP and HPH_RN of microprocessor MSM8x25Q holds output audio signal, this audio signal to be held with INP and INN of D class power amplifier respectively with C2 through coupling capacitance C1 and is connected, audio signal is after power amplification, the audio signal that VOP and the VON end of D class power amplifier exports suppresses high-frequency signal (antistatic) respectively through magnetic bead L1 and magnetic bead L2, circuit carries out filtering to audio signal after filtering again, and filtered audio signal inputs to outside speaker; In the process, by regulating the resistance of variable resistor R1, R2 to reach the object of adjustment volume.
Claims (2)
1. based on the outside speaker circuit of D class power amplifier, it is characterized in that: it comprises microprocessor, D class power amplifier, magnetic bead L1, magnetic bead L2 and loudspeaker, the cathode output end of microprocessor is connected with the electrode input end of D class power amplifier by coupling capacitance C1, the filter circuit that the cathode output end of D class power amplifier is consisted of with by filter capacitor C3 magnetic bead L1 is successively connected with the electrode input end of loudspeaker, the cathode output end of microprocessor is connected with the negative input of D class power amplifier by coupling capacitance C2, the filter circuit that the cathode output end of D class power amplifier is consisted of with by filter capacitor C4 magnetic bead L2 is successively connected with the negative input of loudspeaker, one end of filter capacitor C3 is connected on the points of common connection of loudspeaker electrode input end and magnetic bead L1, filter capacitor C3 other end ground connection, the other end ground connection of filter capacitor C4 on the points of common connection that one end of filter capacitor C4 is connected to loudspeaker negative input and magnetic bead L2.
2. the outside speaker circuit based on D class power amplifier according to claim 1, it is characterized in that: also comprise volume control circuit, volume control circuit is arranged between filter circuit and loudspeaker, volume control circuit is made up of variable resistor R1 and variable resistor VR2, one end of variable resistor R1 is connected with loudspeaker negative input, one end of variable resistor R2 is connected with loudspeaker electrode input end, and the other end of variable resistor R1 and the other end of variable resistor R2 are altogether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420218831.1U CN204090121U (en) | 2014-04-30 | 2014-04-30 | Based on the outside speaker circuit of D class power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420218831.1U CN204090121U (en) | 2014-04-30 | 2014-04-30 | Based on the outside speaker circuit of D class power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204090121U true CN204090121U (en) | 2015-01-07 |
Family
ID=52182787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420218831.1U Expired - Fee Related CN204090121U (en) | 2014-04-30 | 2014-04-30 | Based on the outside speaker circuit of D class power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204090121U (en) |
-
2014
- 2014-04-30 CN CN201420218831.1U patent/CN204090121U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20160430 |