CN105978497A - Ripple suppression circuit based audio power amplification system - Google Patents
Ripple suppression circuit based audio power amplification system Download PDFInfo
- Publication number
- CN105978497A CN105978497A CN201610409708.1A CN201610409708A CN105978497A CN 105978497 A CN105978497 A CN 105978497A CN 201610409708 A CN201610409708 A CN 201610409708A CN 105978497 A CN105978497 A CN 105978497A
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- CN
- China
- Prior art keywords
- audion
- pole
- electric capacity
- positive pole
- resistance
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- 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.)
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/26—Modifications of amplifiers to reduce influence of noise generated by amplifying elements
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/181—Low frequency amplifiers, e.g. audio preamplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
Abstract
The invention discloses a ripple suppression circuit based audio power amplification system. The ripple suppression circuit based audio power amplification system is characterized by being mainly composed of a pre-amplification circuit, a triode TV2, a current limiter, a capacitor C3 with the positive electrode connected with the pre-amplification circuit and the negative electrode connected with the input end of the current limiter, a resistor R5 with one end connected with the collector electrode of the triode VT2 and the other end grounded, a ripple suppression circuit connected with the emitter electrode of the triode VT2, a power amplification circuit connected with the ripple suppression circuit, and a capacitor C4 with the positive electrode connected with the pre-amplification circuit and the negative electrode connected with the power amplification circuit. The ripple suppression circuit based audio power amplification system can filter a ripple voltage, thereby reducing electromagnetic noise of the system and improving the stability of the system.
Description
Technical field
The present invention relates to electronic applications, specifically refer to a kind of Audio power amplifier system based on ripple suppression circuit
System.
Background technology
Along with quality of life is pursued more and more higher by people, home theater enters into every household the most substantially, its
The biggest enjoyment is brought to people's life.The tonequality of high definition can improve the effect of viewing, therefore, family's shadow
Audio power amplification system used in institute is then particularly important.But, traditional Audio power amplifier
System is easily caused audio signal distortion when amplifying audio signal, and this have impact on sound to a great extent
The quality play.
Summary of the invention
It is an object of the invention to overcome traditional audio power amplification system easy when audio signal is amplified
Cause the defect of audio signal distortion, it is provided that a kind of audio power amplification system based on ripple suppression circuit.
The purpose of the present invention is achieved through the following technical solutions: a kind of audio power based on ripple suppression circuit
Amplification system, mainly by pre-amplification circuit, audion VT2, current limiter, positive pole and pre-amplification circuit
Be connected, electric capacity C3 that negative pole is then connected with the input of current limiter, the current collection of one end and audion VT2
Pole is connected, the resistance R5 of other end ground connection, the ripple being connected with the emitter stage of audion VT2 suppression electricity
Road, the power amplification circuit being connected with ripple suppression circuit, positive pole is connected with pre-amplification circuit, bears
The electric capacity C4 that pole is then connected with power amplification circuit, and it is serially connected in pre-amplification circuit and power amplification electricity
Inductance L1 composition between road；The described base stage of audion VT2 is connected with the outfan of current limiter；Institute
The positive pole stating electric capacity C3 connects power supply.
Further, described ripple suppression circuit is by audion VT4, audion VT5, negative pole and audion
The base stage of VT4 is connected, positive pole after resistance R8 as the electric capacity C7 of input of this ripple suppression circuit,
The electric capacity C6 that minus earth, positive pole base stage with audion VT4 after resistance R9 is connected, is serially connected in electricity
Holding the resistance R10 between positive pole and the colelctor electrode of audion VT4 of C6, positive pole is sent out with audion VT4's
The electric capacity C8 that emitter-base bandgap grading is connected, negative pole then base stage with audion VT4 is connected, positive pole and audion VT4
Colelctor electrode is connected, negative pole base stage with audion VT5 after resistance R11 is connected electric capacity C9, N
Diode D4, the N pole that pole is connected with the negative pole of electric capacity C9, P pole then negative pole with electric capacity C8 is connected
Be connected with the positive pole of electric capacity C6, diode D5 that P pole then colelctor electrode with audion VT5 is connected,
The resistance R12 being serially connected between the emitter stage of audion VT5 and the P pole of diode D4, and positive pole with
The emitter stage of audion VT5 is connected, negative pole is then as the electric capacity C10 of outfan of this ripple suppression circuit
Composition；The input of described ripple suppression circuit is connected with the emitter stage of audion VT2, its outfan then
It is connected with power amplification circuit.
Described pre-amplification circuit by audion VT1, amplifier P1, negative pole after resistance R1 with amplifier
The positive pole of P1 is connected, positive pole is then as the electric capacity C1 of input of this pre-amplification circuit, positive pole and amplification
The electric capacity C2 that the positive pole of device P1 is connected, negative pole base stage with audion VT1 after resistance R2 is connected,
One end is connected with the positive pole of amplifier P1, the resistance R3 of other end ground connection, is serially connected in the negative of amplifier P1
Resistance R4 between the base stage of pole and audion VT1, and N pole is connected with the outfan of amplifier P1,
The diode D1 composition that P pole is then connected with the colelctor electrode of VT1；The positive pole of described amplifier P1 and electric capacity
The positive pole of C3 is connected, its outfan then with respectively with the positive pole of electric capacity C4 and the input of current limiter is connected
Connect；The grounded emitter of described audion VT1, its colelctor electrode then after inductance L1 with ripple suppression circuit
Outfan be connected.
Described power amplification circuit by amplifier P2, audion VT3, the negative pole phase of positive pole and amplifier P2
Connect, electric capacity C5, the P pole of minus earth is connected with the outfan of ripple suppression circuit, N pole is then with three
Diode D2, the P pole that the base stage of pole pipe VT3 is connected is connected with the colelctor electrode of audion VT3, N
The diode D3 that pole is the most sequentially connected through loudspeaker BL outfan with amplifier P2 after inductance L1, with
And one end is connected with the base stage of audion VT3, the other end then after resistance R7 with inductance L2 and loudspeaker
The resistance R6 composition that the junction point of BL is connected；The positive pole of described amplifier P2 and the negative pole phase of electric capacity C4
Connect；The grounded emitter of described audion VT3.
The present invention compared with the prior art, has the following advantages and beneficial effect:
(1) audio signal can be amplified processing by the present invention, and the present invention has stable static work
Point, so that it is guaranteed that the waveform of the audio signal after Fang great ing is identical with the waveform of the audio signal before amplification, it is to avoid
Audio signal occurs that distortion causes distorted signals after amplification, ensures that the quality that sound is play.
(2) ripple voltage can be filtered by the present invention, thus reduces the electromagnetic noise of system, improves system
The stability of system.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the structure chart of the ripple suppression circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not
It is limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by pre-amplification circuit, audion VT2, current limiter, positive pole with
The electric capacity C3 that pre-amplification circuit is connected, negative pole is then connected with the input of current limiter, one end and three poles
The colelctor electrode of pipe VT2 is connected, the resistance R5 of other end ground connection, is connected with the emitter stage of audion VT2
The ripple suppression circuit connect, the power amplification circuit being connected with ripple suppression circuit, positive pole and preposition amplification
The electric capacity C4 that circuit is connected, negative pole is then connected with power amplification circuit, and it is serially connected in preposition amplification electricity
Inductance L1 composition between road and power amplification circuit；The base stage of described audion VT2 is defeated with current limiter
Go out end to be connected；The positive pole of described electric capacity C3 connects power supply.In order to preferably implement the present invention, described current limiter
The KR01-B type current limiter that preferentially employing Hefei City Xu Sheng Novel electric tracing Science and Technology Ltd. produces.
Wherein, this pre-amplification circuit is by audion VT1, amplifier P1, electric capacity C1, electric capacity C2, electricity
Resistance R1, resistance R2, resistance R3, resistance R4 and diode D1 composition.
During connection, the negative pole of electric capacity C1 positive pole with amplifier P1 after resistance R1 is connected, its positive pole then
Input as this pre-amplification circuit.The positive pole of electric capacity C2 is connected with the positive pole of amplifier P1, it
Negative pole base stage with audion VT1 after resistance R2 is connected.One end of resistance R3 is with amplifier P1's
Positive pole is connected, its other end ground connection.Resistance R4 is serially connected in the negative pole of amplifier P1 and audion VT1's
Between base stage.The N pole of diode D1 is connected with the outfan of amplifier P1, its P pole then with VT1
Colelctor electrode be connected.
Meanwhile, the positive pole of described amplifier P1 be connected with the positive pole of electric capacity C3, its outfan then with respectively
It is connected with the positive pole of electric capacity C4 and the input of current limiter.The grounded emitter of described audion VT1,
Its colelctor electrode then after inductance L1 outfan with ripple suppression circuit be connected.
It addition, this power amplification circuit is by amplifier P2, audion VT3, resistance R7, resistance R6, electricity
Sense L2, electric capacity C5, diode D2, diode D3 and loudspeaker BL composition.
During connection, the positive pole of electric capacity C5 is connected with the negative pole of amplifier P2, its minus earth.Diode
The P pole of D2 is connected with the outfan of ripple suppression circuit, its N pole then with the base stage phase of audion VT3
Connect.The P pole of diode D3 is connected with the colelctor electrode of audion VT3, its N pole is the most sequentially through loudspeaker
After BL and inductance L1, the outfan with amplifier P2 is connected.One end of resistance R6 is with audion VT3's
Base stage is connected, its other end then after resistance R7 junction point with inductance L2 and loudspeaker BL be connected.
The positive pole of described amplifier P2 is connected with the negative pole of electric capacity C4；The grounded emitter of described audion VT3.
As in figure 2 it is shown, this ripple suppression circuit is by audion VT4, audion VT5, resistance R8, resistance
R9, resistance R10, resistance R11, resistance R12, diode D4, diode D5, electric capacity C6, electric capacity
C7, electric capacity C8, electric capacity C9 and electric capacity C10.
During connection, the negative pole of electric capacity C7 is connected with the base stage of audion VT4, its positive pole is after resistance R8
As the input of this ripple suppression circuit and it is connected with the emitter stage of audion VT2.Electric capacity C6's is negative
Pole ground connection, its positive pole base stage with audion VT4 after resistance R9 is connected.Resistance R10 is serially connected in electricity
Hold between positive pole and the colelctor electrode of audion VT4 of C6.The positive pole of electric capacity C8 is sent out with audion VT4's
Emitter-base bandgap grading is connected, its negative pole then base stage with audion VT4 is connected.The positive pole of electric capacity C9 and audion
The colelctor electrode of VT4 is connected, its negative pole base stage with audion VT5 after resistance R11 is connected.Two poles
The N pole of pipe D4 is connected with the negative pole of electric capacity C9, its P pole then negative pole with electric capacity C8 is connected.Two
The N pole of pole pipe D5 is connected with the positive pole of electric capacity C6, its P pole then with the colelctor electrode phase of audion VT5
Connect.Resistance R12 is serially connected between the emitter stage of audion VT5 and the P pole of diode D4.Electric capacity C10
Positive pole be connected with the emitter stage of audion VT5, negative pole then as this ripple suppression circuit outfan also
It is connected with the P pole of diode D2.
During work, first the voltage of the audio frequency small-signal of input be amplified by the present invention, obtains rear stage institute
Required voltage size, carries out power amplification to audio signal the most again so that it is can obtain required audio frequency.
Audio signal can be amplified processing by the present invention, and the present invention has stable quiescent point, thus
Guarantee that the waveform of the audio signal after amplifying is identical with the waveform of the audio signal before amplification, it is to avoid audio signal
Occur that distortion causes distorted signals after amplification, ensure that the quality that sound is play.Meanwhile, this
Bright ripple voltage can also be filtered, thus reduce the electromagnetic noise of system, improve the stability of system.
As it has been described above, just can well realize the present invention.
Claims (4)
1. an audio power amplification system based on ripple suppression circuit, it is characterised in that main by preposition
Amplifying circuit, audion VT2, current limiter, positive pole is connected with pre-amplification circuit, negative pole then with current limliting
The electric capacity C3 that the input of device is connected, one end is connected with the colelctor electrode of audion VT2, other end ground connection
Resistance R5, the ripple suppression circuit being connected with the emitter stage of audion VT2, with ripple suppression circuit phase
Connect power amplification circuit, positive pole is connected with pre-amplification circuit, negative pole then with power amplification circuit phase
The electric capacity C4 connected, and the inductance L1 composition being serially connected between pre-amplification circuit and power amplification circuit；
The described base stage of audion VT2 is connected with the outfan of current limiter；The positive pole of described electric capacity C3 connects power supply.
A kind of audio power amplification system based on ripple suppression circuit the most according to claim 1, its
Being characterised by, described ripple suppression circuit is by audion VT4, audion VT5, negative pole and audion VT4
Base stage be connected, positive pole after resistance R8 as the electric capacity C7 of input of this ripple suppression circuit, negative
The electric capacity C6 that pole ground connection, positive pole base stage with audion VT4 after resistance R9 is connected, is serially connected in electric capacity
The transmitting of the resistance R10 between positive pole and the colelctor electrode of audion VT4 of C6, positive pole and audion VT4
The electric capacity C8 that pole is connected, negative pole then base stage with audion VT4 is connected, positive pole and audion VT4
Colelctor electrode is connected, negative pole base stage with audion VT5 after resistance R11 is connected electric capacity C9, N
Diode D4, the N pole that pole is connected with the negative pole of electric capacity C9, P pole then negative pole with electric capacity C8 is connected
Be connected with the positive pole of electric capacity C6, diode D5 that P pole then colelctor electrode with audion VT5 is connected,
The resistance R12 being serially connected between the emitter stage of audion VT5 and the P pole of diode D4, and positive pole with
The emitter stage of audion VT5 is connected, negative pole is then as the electric capacity C10 of outfan of this ripple suppression circuit
Composition；The input of described ripple suppression circuit is connected with the emitter stage of audion VT2, its outfan then
It is connected with power amplification circuit.
A kind of audio power amplification system based on ripple suppression circuit the most according to claim 2, its
Be characterised by, described pre-amplification circuit by audion VT1, amplifier P1, negative pole after resistance R1 with
The positive pole of amplifier P1 is connected, positive pole then as the electric capacity C1 of input of this pre-amplification circuit, just
Pole is connected with the positive pole of amplifier P1, negative pole base stage with audion VT1 after resistance R2 is connected
Electric capacity C2, one end is connected with the positive pole of amplifier P1, the resistance R3 of other end ground connection, is serially connected in amplification
Resistance R4 between negative pole and the base stage of audion VT1 of device P1, and N pole and amplifier P1's is defeated
Go out the diode D1 composition that end is connected, P pole is then connected with the colelctor electrode of VT1；Described amplifier P1
Positive pole be connected with the positive pole of electric capacity C3, its outfan then with respectively with positive pole and the current limiter of electric capacity C4
Input be connected；The grounded emitter of described audion VT1, its colelctor electrode then after inductance L1 with
The outfan of ripple suppression circuit is connected.
A kind of audio power amplification system based on ripple suppression circuit the most according to claim 3, its
Being characterised by, described power amplification circuit is by amplifier P2, audion VT3, and positive pole is with amplifier P2's
Negative pole is connected, electric capacity C5, the P pole of minus earth is connected with the outfan of ripple suppression circuit, N pole
Diode D2, the P pole that then base stage with audion VT3 is connected is connected with the colelctor electrode of audion VT3
Connect, diode that N pole is the most sequentially connected through loudspeaker BL outfan with amplifier P2 after inductance L1
D3, and one end is connected with the base stage of audion VT3, the other end then after resistance R7 with inductance L2
The resistance R6 composition being connected with the junction point of loudspeaker BL；The positive pole of described amplifier P2 is with electric capacity C4's
Negative pole is connected；The grounded emitter of described audion VT3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610409708.1A CN105978497A (en) | 2016-06-12 | 2016-06-12 | Ripple suppression circuit based audio power amplification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610409708.1A CN105978497A (en) | 2016-06-12 | 2016-06-12 | Ripple suppression circuit based audio power amplification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105978497A true CN105978497A (en) | 2016-09-28 |
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ID=57011098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610409708.1A Pending CN105978497A (en) | 2016-06-12 | 2016-06-12 | Ripple suppression circuit based audio power amplification system |
Country Status (1)
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| CN (1) | CN105978497A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108471570A (en) * | 2017-02-23 | 2018-08-31 | 英飞凌科技股份有限公司 | IC apparatus and device for protecting circuit |
| CN110366819A (en) * | 2017-02-28 | 2019-10-22 | 思睿逻辑国际半导体有限公司 | With controlled power supply for amplifying the amplifier circuit of audio signal |
-
2016
- 2016-06-12 CN CN201610409708.1A patent/CN105978497A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108471570A (en) * | 2017-02-23 | 2018-08-31 | 英飞凌科技股份有限公司 | IC apparatus and device for protecting circuit |
| CN108471570B (en) * | 2017-02-23 | 2020-10-16 | 英飞凌科技股份有限公司 | Integrated circuit arrangement and arrangement for protecting a circuit |
| CN110366819A (en) * | 2017-02-28 | 2019-10-22 | 思睿逻辑国际半导体有限公司 | With controlled power supply for amplifying the amplifier circuit of audio signal |
| CN110366819B (en) * | 2017-02-28 | 2023-01-24 | 思睿逻辑国际半导体有限公司 | Amplifier circuit for amplifying an audio signal with controlled power supply |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160928 |
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| WD01 | Invention patent application deemed withdrawn after publication |