CN205336232U - D class power amplifier of remote wireless infrared transmission - Google Patents
D class power amplifier of remote wireless infrared transmission Download PDFInfo
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- CN205336232U CN205336232U CN201620085040.5U CN201620085040U CN205336232U CN 205336232 U CN205336232 U CN 205336232U CN 201620085040 U CN201620085040 U CN 201620085040U CN 205336232 U CN205336232 U CN 205336232U
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Abstract
The utility model discloses a D class power amplifier of remote wireless infrared transmission, including audio signal modulation and transmitting circuit and signal reception and demodulation circuit, audio signal modulation includes the audio frequency plug with the transmitting circuit, with audio frequency connector assembly's audio signal amplifier, and the comparator module be connected with the audio signal amplifier to and the infrared transmission module, the triangular wave signal generator that are connected with the comparator module respectively, signal reception and demodulation circuit include infrared receiver module, and tertiary cascode that the parallel -series connection is connected with infrared receiver module combines enlargies the module, and the tertiary cascode that combines with the parallel -series connection enlargies the drive module that the module is connected, and the full -bridge be connected with drive module alternaties the module, alternate the quadravalence passive filter that the module is connected with the full -bridge, the speaker be connected with quadravalence passive filter. The utility model discloses a remote sound signal transmission who do not occupy the communication frequency channel, does not produce the radiation, not disturbed by interfering signal, and whole circuit is simple.
Description
Technical field
This utility model relates to high efficiency D-type power amplifier, is specifically related to the D-type power amplifier of a kind of remote-wireless infrared transmission。
Background technology
People always like the fatigue loosening in work by the mode listening music, or happily gather celebration, or cultivate one's taste。Market of today have various, a feast for the eyes sound equipment brand, amplifier within the sound equipment of these brands mainly adopts Class A, Class B, the first and second complementary classes, recommends amplification constant power amplifier, although D class power amplifier comes out a lot of year, but genuine productsization application is quite few。
For traditional Class A, Class B, the first and second complementary classes, recommend amplification constant power amplifier operation time, directly analogue signal is amplified, duration of work necessarily operates in linear amplification region, power dissipation is bigger, although output is recommended in some employing, decrease the power that bears of power device, but under bigger power situation, still power device being constituted and greatly threaten, power output is restricted。
D-type power amplifier works on off state, and theoretical efficiency is up to 100%, and the dissipated power of power device is little, produces heat few, it is possible to being greatly reduced the size of radiator, continuous power output easily reaches hundreds of watts。In recent years, accelerate the research and development to D-type audio power amplifier in the world, and make some progress, every practicality index and reliability index are all greatly improved, and constantly at the output of Xiang Geng great, less volume, lighter weight, more function and intelligent direction development。In the near future, D-type audio power amplifier necessarily replaces traditional analogue audio frequency power amplifier。
The D class power amplifier of current main flow adopts the audio signal that signal generator produces triangular wave and input to utilize comparator to compare output SPWM ripple, carries out the modulation of signal, then passes through drive circuit and drives H bridge to carry out inversion, and general triangular wave frequency is about 200KHZ。It is known that triangular wave frequency more highly reduced after waveform more good, but common amplifier frequency high after the shape of triangular waveform there will be certain distortion, wow and flutter can occur signal, directly influencing after, the signal of recovery is different from original signal and produce distortion。And this scheme is when primary signal is with triangle wave, and primary signal is very little it is generally required to be amplified, amplifying element also can introduce other interference。
Currently also have and utilize MCU system to carry out the sampling of audio signal, modulation, produce SPWM ripple。Adopt Embedded MCU can accomplish very high-precision sampling, but the restriction by MCU clock frequency, output SPWM wave frequency is not high, high accuracy (duty cycle adjustment precision height) the SPWM ripple limiting frequency that embedded STM32F103 such as present main flow export just 100KHZ, sound-reducing weak effect yet。Adopting the MCU system that clock frequency is high, the FPGA such as STM32F407 or higher can accomplish SPWM ripple higher frequency, but cost will raise again significantly。
Development along with science and technology, people are also not limited only to traditional high-fidelity function for the requirement of power amplifier, the product of the Bluetooth audio device being wirelessly transferred etc is day by day popular, Bluetooth audio device has the drawback that bluetooth to take communications band, produce radiation, it is vulnerable to the high-frequency signal interference of same frequency, cost intensive。And internal general also without adopting high efficiency D-type power amplifier to be used as sound equipment driving, power-efficient is extremely low。
Summary of the invention
The purpose of this utility model is to provide the D-type power amplifier of a kind of remote-wireless infrared transmission, the remote transmission of sound signals being not take up communications band, not producing radiation, interference-free signal disturbing can be realized, tradition D class power amplifier can also be improved and there will be the defect of distortion, improve efficiency, reduce cost, and integrated circuit is simple。
The D-type power amplifier of remote-wireless infrared transmission described in the utility model, receives and demodulator circuit with radiating circuit and signal including modulates audio signals；
Described modulates audio signals and radiating circuit include audio jack, audio signal amplifier, triangular signal generator based, comparator module and infrared transmission module；
Described audio jack is used for receiving acoustical signal input；
Described audio signal amplifier is for being amplified the audio signal of input, and this audio signal amplifier is connected with audio jack；
Described triangular signal generator based be triangular wave for producing frequency；
Described comparator module for output modulation signal SPWM ripple after the audio signal of input and triangular wave are compared, this comparator module respectively with audio signal amplifier, triangular signal generator based be connected；
Described infrared transmission module is for sending modulation signal SPWM ripple, and this infrared transmission module is connected with comparator module；
Described signal receives and includes three grades of cascode amplification modules of infrared receiving module series combination with demodulator circuit, drive module, full-bridge conversion module, quadravalence passive filter and speaker；
Described infrared receiving module is for receiving the modulation signal SPWM ripple that infrared transmission module sends；
Described and series combination three grades of cascode amplification modules reduce for modulating signal SPWM ripple, and produce the SPWM ripple of two paths of signals opposite in phase, and the three of series combination grades of cascode amplification modules are connected with infrared receiving module；
Described driving module is used for driving full-bridge conversion module, and this driving module is connected with also three grades of cascode amplification modules of series combination, full-bridge conversion module respectively；
Described full-bridge conversion module carries out power conversion for SPWM ripple signal；
Described quadravalence passive filter is for being filtered the SPWM ripple signal after power conversion, demodulate, and is reduced into the most original acoustical signal, and this quadravalence passive filter is connected with full-bridge conversion module；
Described speaker is used for playing acoustical signal, and this speaker is connected with quadravalence passive filter。
Further, described driving module includes the first driving submodule and second and drives submodule, first drives submodule to be connected with also three grades of cascode amplification modules of series combination, full-bridge conversion module respectively, and second drives submodule to be connected with also three grades of cascode amplification modules of series combination, full-bridge conversion module respectively。
Further, described audio signal amplifier includes amplifier U2, and the model of this amplifier U2 is OPA172。
Further, described triangular signal generator based be 500KHZ triangular wave for producing frequency；It includes amplifier U6 and comparator U4, and the model of described amplifier U6 is OPA172, and the model of described comparator U4 is TLV3202。
Further, described comparator module includes comparator U3, and the model of this comparator U3 is TLV3202。
Further, described and series combination three grades of cascode amplification modules include switching tube Q4, switching tube Q7, switching tube Q8, resistance R24, resistance R3, slide rheostat R15, slide rheostat R22 and slide rheostat R27, the emitter stage of switching tube Q4 respectively with the emitter stage of switching tube Q7, the emitter stage of switching tube Q8 connects, the base stage of switching tube Q4 is connected with the base stage of switching tube Q7, and the base stage of switching tube Q4 is connected with infrared receiving module through resistance R3 with the junction point of the base stage of switching tube Q7, the colelctor electrode of switching tube Q4 is successively through slide rheostat R15, slide rheostat R22, the base stage of resistance R24 and switching tube Q8 is connected, and the junction point of slide rheostat R22 and resistance R24 is connected with the colelctor electrode of switching tube Q7, the junction point of slide rheostat R15 and slide rheostat R22 is connected with the colelctor electrode through slide rheostat R27 with switching tube Q8。
Further, described first drives submodule to include driver U1, and the model of this driver U1 is IR2110；Described second drives submodule to include driver U5, and the model of this driver U5 is IR2110。
Further, described full-bridge conversion module includes metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q6 and metal-oxide-semiconductor Q9, and described first drives submodule to be used for driving metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3, and described second drives submodule to be used for driving metal-oxide-semiconductor Q6 and metal-oxide-semiconductor Q9。
The beneficial effects of the utility model:
(1) Bluetooth audio device etc. on the market can be replaced to need to take communications band, can produce radiation be wirelessly transferred stereo set；Long-distance transmissions (less than 20 meters) can be realized, and due to the special mechanism of infrared communication transmission, transmitting procedure will not be subject to the interference of other signals, will not be shielded；
(2) improve the operating frequency of D class power amplifier when ensureing duty cycle adjustment precision, signal wow and flutter not occurring, frequency is 500KHZ, improves the reduction degree of signal, it is ensured that the high-fidelity of sound；
(3) simple in construction of whole system, cost is low, and pure hardware circuit completes, it is not necessary to MCU；Modulates audio signals and radiating circuit have only to a piece of OPA172 and a piece of TLV3202；
(4) be beneficial to portable, this D class power amplifier is portable design, modulates audio signals receives with radiating circuit, signal all takes single supply, a power supply to power with demodulator circuit, modulates audio signals and radiating circuit only need joint about a 5V battery to power, and signal receives only needs joint about a 12V battery to power with demodulator circuit；
In sum, this utility model is capable of being not take up communications band, do not produce radiation, the remote transmission of sound signals of interference-free signal disturbing, solve that existing Baffle Box of Bluetooth etc. relies on that the power amplifier of wireless transmission methods exists take communications band, have radiation, the defect such as high-frequency signal interference that to be subject to frequency close。Also improve modulating frequency simultaneously, utilize the characteristic of high frequency modulated to improve tradition D class power amplifier and there will be the defect of distortion, improve efficiency, reduce cost, and integrated circuit is simple, it is simple to carry。
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model；
Fig. 2 is the circuit diagram of the modulates audio signals in this utility model and radiating circuit；
Fig. 3 is the circuit diagram that the signal in this utility model receives with demodulator circuit；
In figure: 1, audio jack, 2, audio signal amplifier, 3, triangular signal generator based, 4, comparator module, 5, infrared transmission module, 6, infrared receiving module, 7 and three grades of cascode amplification modules of series combination, 8, module is driven, 8a, first driving submodule, 8b second drives submodule, and 9, full-bridge conversion module, 10, quadravalence passive filter, 11, speaker。
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail。
The D-type power amplifier of remote-wireless infrared transmission as shown in Figure 1, receives and demodulator circuit with radiating circuit and signal including modulates audio signals。
As it is shown in figure 1, described modulates audio signals and radiating circuit include audio jack 1, audio signal amplifier 2, triangular signal generator based 3, comparator module 4 and infrared transmission module 5。Described audio jack 1 is used for receiving acoustical signal input。Described audio signal amplifier 2 is for being amplified the audio signal of input, and this audio signal amplifier 2 is connected with audio jack 1。Described triangular signal generator based 3 are used for producing frequency being 500KHZ triangular wave。Described comparator module 4 for output modulation signal SPWM ripple after the audio signal of input and triangular wave are compared, this comparator module 4 respectively with audio signal amplifier 2, triangular signal generator based 3 be connected。Described infrared transmission module 5 is for sending modulation signal SPWM ripple, and this infrared transmission module 5 is connected with comparator module 4。
Include three grades of cascode amplification modules 7 of infrared receiving module 6 series combination as it is shown in figure 1, described signal receives with demodulator circuit, drive module 8, full-bridge conversion module 9, quadravalence passive filter 10 and speaker 11。Described infrared receiving module 6 is for receiving the modulation signal SPWM ripple that infrared transmission module 5 sends。Described and series combination three grades of cascode amplification modules 7 reduce for modulating signal SPWM ripple, and produce the SPWM ripple of two paths of signals opposite in phase, and the three of series combination grades of cascode amplification modules 7 are connected with infrared receiving module 6。Described driving module 8 is used for driving full-bridge conversion module 9, and this driving module 8 is connected with also three grades of cascode amplification modules 7 of series combination, full-bridge conversion module 9 respectively。Described full-bridge conversion module 9 carries out power conversion for SPWM ripple signal。Described quadravalence passive filter 10 is for being filtered the SPWM ripple signal after power conversion, demodulate, and is reduced into the most original acoustical signal, and this quadravalence passive filter 10 is connected with full-bridge conversion module 9。Described speaker 11 is used for playing acoustical signal, and this speaker 11 is connected with quadravalence passive filter 10。
As shown in Figure 1, described driving module 8 includes the first driving submodule 8a and the second and drives submodule 8b, first drives submodule 8a to be connected with also three grades of cascode amplification modules 7 of series combination, full-bridge conversion module 9 respectively, and second drives submodule 8b to be connected with also three grades of cascode amplification modules 7 of series combination, full-bridge conversion module 9 respectively。
As in figure 2 it is shown, described audio signal amplifier 2 includes amplifier U2, resistance R2, resistance R4, resistance R5, resistance R7, resistance R8, resistance R9, resistance R12 and electric capacity C1, the model of described amplifier U2 is OPA172。The annexation of each components and parts is as follows above: amplifier U2 is that 2 feet are connected with its 3 foot through resistance R4, electric capacity C1, resistance R8, resistance R12 successively, and 3 feet of amplifier U2 are also connected with the junction point of resistance R12 through resistance R7, resistance R2, resistance R9 and resistance R8。
As shown in Figure 2, described triangular signal generator based 3 include amplifier U6, comparator U4, resistance R17, resistance R18, resistance R21, resistance R23, resistance R25, resistance R26, resistance R28, electric capacity C6 and electric capacity C9, the model of described amplifier U6 is OPA172, and the model of described comparator U4 is TLV3202。The annexation of each components and parts is as follows above: 1 foot of amplifier U6 is connected through 3 feet of resistance R23 and comparator U4,2 feet of amplifier U6 are connected through 1 foot of resistance R18 and comparator U4,3 feet of amplifier U6 are connected with 4 feet of comparator U4 through resistance R26, electric capacity C9 successively, 3 feet of comparator U4 also through resistance R25, resistance R17, resistance R21 and amplifier U6 3 feet be connected, the 2 foot meridian capacitor C6 of amplifier U6 are connected with its 1 foot, and the junction point of electric capacity C6 and resistance R23 is connected with comparator module 4 through resistance R28。
As shown in Figure 2, described comparator module 4 includes comparator U3, resistance R13, resistance R14, resistance R19 and resistance R20, wherein, the model of comparator U3 is TLV3202, the annexation of each components and parts is as follows above: 3 feet of comparator U3 are connected with its 4 foot through resistance R14, resistance R13, resistance R19, resistance R20 successively, and 1 foot of comparator U3 is connected with infrared transmission module 5。
As shown in Figure 3, described and series combination three grades of cascode amplification modules 7 include switching tube Q4, switching tube Q7, switching tube Q8, resistance R24, resistance R3, slide rheostat R15, slide rheostat R22 and slide rheostat R27, the annexation of each components and parts is as follows above: the emitter stage of switching tube Q4 respectively with the emitter stage of switching tube Q7, the emitter stage of switching tube Q8 connects, the base stage of switching tube Q4 is connected with the base stage of switching tube Q7, and the base stage of switching tube Q4 is connected with infrared receiving module 6 through resistance R3 with the junction point of the base stage of switching tube Q7, the colelctor electrode of switching tube Q4 is successively through slide rheostat R15, slide rheostat R22, the base stage of resistance R24 and switching tube Q8 is connected, and the junction point of slide rheostat R22 and resistance R24 is connected with the colelctor electrode of switching tube Q7, the junction point of slide rheostat R15 and slide rheostat R22 is connected with the colelctor electrode through slide rheostat R27 with switching tube Q8。
As it is shown on figure 3, described first drives submodule 8a to include driver U1, diode BD1 and electric capacity BC1, wherein, the model of driver U1 is IR2110；The annexation of each components and parts is as follows above: 9 feet of driver U1 are connected with its 5 foot through diode BD1, electric capacity BC1 successively。
As it is shown on figure 3, described second drives submodule 8b to include driver U5, diode BD4 and electric capacity BC2, wherein, the model of driver U5 is IR2110；The annexation of each components and parts is as follows above: 9 feet of driver U2 are connected with its 5 foot through diode BD4, electric capacity BC2 successively。
As shown in Figure 3, described full-bridge conversion module 9 includes metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q6, metal-oxide-semiconductor Q9, resistance BR1, resistance BR2, resistance BR3, resistance BR4, diode BD2, diode BD3, diode BD5 and diode BD6, the annexation of each components and parts is as follows above: resistance BR1 is in parallel with diode BD2, and one of them junction point of resistance BR1 and diode BD2 is connected with 7 feet of driver U1, another junction point of resistance BR1 and diode BD2 is connected with the grid of metal-oxide-semiconductor Q1。Resistance BR2 is in parallel with diode BD3, and one of them junction point of resistance BR2 and diode BD3 is connected with 1 foot of driver U1, and another junction point of resistance BR2 and diode BD3 is connected with the grid of metal-oxide-semiconductor Q3。The source electrode of metal-oxide-semiconductor Q1 is connected with the drain electrode of metal-oxide-semiconductor Q3, and the drain electrode of metal-oxide-semiconductor Q1 connects VCC, the source ground of metal-oxide-semiconductor Q3。Resistance BR3 is in parallel with diode BD5, and one of them junction point of resistance BR3 and diode BD5 is connected with 7 feet of driver U2, and another junction point of resistance BR3 and diode BD5 is connected with the grid of metal-oxide-semiconductor Q6。Resistance BR4 is in parallel with diode BD6, and one of them junction point of resistance BR4 and diode BD6 is connected with 1 foot of driver U2, and another junction point of resistance BR4 and diode BD6 is connected with the grid of metal-oxide-semiconductor Q9。The source electrode of metal-oxide-semiconductor Q6 is connected with the drain electrode of metal-oxide-semiconductor Q9, and the drain electrode of metal-oxide-semiconductor Q6 connects VCC, the source ground of metal-oxide-semiconductor Q9。
As shown in Figure 3, described quadravalence passive filter 10 includes inductance L1, inductance L2, inductance L3, inductance L4, electric capacity C2, electric capacity C3, electric capacity C7 and electric capacity C8, the annexation of each components and parts is as follows above: one end of inductance L1 is connected with one end of inductance L3 through inductance L2, electric capacity C2, electric capacity C7 successively, the other end of inductance L1 and the other end of inductance L3 are connected with full-bridge conversion module 9 respectively, and the junction point of inductance L2 and electric capacity C2 is connected with the junction point of inductance L3 through inductance L2, electric capacity C3, electric capacity C8, inductance L4 and electric capacity C7 successively。
As shown in Figure 2, audio jack 1 is the input of acoustical signal, the acoustical signal size of input is regulated by regulator potentiometer, the output volume of whole power amplifier can be changed, electric capacity C1 carries out every directly removing direct current signal, resistance R2, the bleeder circuit of resistance R9 composition and resistance R7, in-phase end and the end of oppisite phase of the bleeder circuit respectively amplifier U2 of resistance R12 composition provide bias voltage, amplifier U2 and resistance R4, after input audio signal is amplified by the amplifier of resistance R5 composition, through electric capacity C4 every directly removing the direct current signal produced in amplifier U2, only retain the audio signal after amplifying, it is then input to the in-phase end of comparator U3。Meanwhile, amplifier U6 and comparator U4 forms triangular-wave generator, and the triangular wave frequency of generation is 500KHZ, and the triangular wave of triangular-wave generator output is through electric capacity C5 end of oppisite phase of output comparator U3 after directly removing direct current signal。The bleeder circuit of resistance R13, resistance R14, resistance R19, resistance R20 composition provides the bias voltage of in-phase end and end of oppisite phase for comparator U3。Output modulation signal after audio signal and the triangle wave of input, (frequency is the SPWM ripple of 500KHZ to comparator U3, change triangular-wave generator component parameters and can also carry out SPWM wave frequency adjustment), through the infrared transmission module 5 being made up of resistance R11, switching tube Q5, infrared transmitting tube 1, infrared transmitting tube 2, modulation signal is sent。This utility model adopts two infrared transmitting tubes to send simultaneously, it is possible to improve transmission range。
As shown in Figure 3, after the infrared receiving module 6 being made up of resistance R1, infrared receiving tube receives the modulation signal that transmitting terminal sends, it (is reduction modulation signal that three grades of cascode amplification modules 7 through also series combination are modulated the reduction of signal, it it not the demodulation of modulation signal, because in being wirelessly transferred process, modulation signal can loss to some extent)。Regulate slide rheostat R15, slide rheostat R22, slide rheostat R27 can change amplification at different levels, until the signal of the colelctor electrode output of the colelctor electrode of switching tube Q4, switching tube Q8 is two SPWM ripple signals that phase place is completely reversed。Now the SPWM ripple signal of the colelctor electrode output of the colelctor electrode of switching tube Q4, switching tube Q8 is just as the signal input part (HIN of the LIN and driver U5 of the switching tube Q4 output driver connected U1 of signal of HIN and the LIN of half-bridge driver IR2110, switching tube Q8 exports the LIN of the HIN and driver U5 of the driver connected U1 of signal), two panels IR2110(and driver U1, driver U5) one half-bridge of each driving, driver U1 drives metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3, driver U5 drives metal-oxide-semiconductor Q6, metal-oxide-semiconductor Q9, and two half-bridges constitute full-bridge and carry out power conversion。SPWM ripple signal after utilizing full-bridge to carry out power conversion is filtered, demodulates through quadravalence passive filter 10 by the output signal of full-bridge, it is reduced into the most original acoustical signal (consistent with the audio signal starting most input), finally drives speaker 11 to send sound again。
This utility model adopts the mode of infrared communication to realize the long-distance transmissions of modulation signal, the SPWM wave frequency of modulation is that 500KHZ(change triangular-wave generator component parameters can also carry out SPWM wave frequency adjustment), modulates audio signals and radiating circuit all adopt TI company high-speed high-performance chip to ensure the precision of modulation signal。Infrared receiving circuit utilizes two audion cascode levels in parallel to amplify the modulation signal providing two-way reverse, adopts IR2110 as full bridge driver, and quadravalence passive filter 10 carries out waveform demodulation, reduction。This utility model is capable of being not take up communications band, do not produce radiation, the remote transmission of sound signals of interference-free signal disturbing, solve that existing Baffle Box of Bluetooth etc. relies on that the power amplifier of wireless transmission methods exists take communications band, have radiation, the defect such as high-frequency signal interference that to be subject to frequency close。Also improve modulating frequency simultaneously, utilize the characteristic of high frequency modulated to improve tradition D class power amplifier and there will be the defect of distortion, improve efficiency, reduce cost, and integrated circuit is simple, it is simple to carry。
Claims (8)
1. the D-type power amplifier of a remote-wireless infrared transmission, it is characterised in that: include modulates audio signals and receive and demodulator circuit with radiating circuit and signal；
Described modulates audio signals and radiating circuit include audio jack (1), audio signal amplifier (2), triangular signal generator based (3), comparator module (4) and infrared transmission module (5)；
Described audio jack (1) is used for receiving acoustical signal input；
Described audio signal amplifier (2) is for being amplified the audio signal of input, and this audio signal amplifier (2) is connected with audio jack (1)；
Described triangular signal generator based (3) are used for producing frequency is triangular wave；
Described comparator module (4) is for output modulation signal SPWM ripple after the audio signal of input and triangular wave being compared, and this comparator module (4) is connected with audio signal amplifier (2), triangular signal generator based (3) respectively；
Described infrared transmission module (5) is for sending modulation signal SPWM ripple, and this infrared transmission module (5) is connected with comparator module (4)；
Described signal receives and includes three grades of cascode amplification modules (7) of infrared receiving module (6) series combination with demodulator circuit, drive module (8), full-bridge conversion module (9), quadravalence passive filter (10) and speaker (11)；
Described infrared receiving module (6) is used for receiving the modulation signal SPWM ripple that infrared transmission module (5) sends；
Described and series combination three grades of cascode amplification modules (7) are reduced for modulating signal SPWM ripple, and produce the SPWM ripple of two paths of signals opposite in phase, be somebody's turn to do and three grades of cascode amplification modules (7) of series combination are connected with infrared receiving module (6)；
Described driving module (8) is used for driving full-bridge conversion module (9), and this driving module (8) is connected with also three grades of cascode amplification modules (7) of series combination, full-bridge conversion module (9) respectively；
Described full-bridge conversion module (9) carries out power conversion for SPWM ripple signal；
Described quadravalence passive filter (10) is for being filtered the SPWM ripple signal after power conversion, demodulate, and is reduced into the most original acoustical signal, and this quadravalence passive filter (10) is connected with full-bridge conversion module (9)；
Described speaker (11) is used for playing acoustical signal, and this speaker (11) is connected with quadravalence passive filter (10)。
2. the D-type power amplifier of remote-wireless infrared transmission according to claim 1, it is characterized in that: described driving module (8) includes the first driving submodule (8a) and second and drives submodule (8b), first drives submodule (8a) to be connected with also three grades of cascode amplification modules (7) of series combination, full-bridge conversion module (9) respectively, and second drives submodule (8b) to be connected with also three grades of cascode amplification modules (7) of series combination, full-bridge conversion module (9) respectively。
3. the D-type power amplifier of remote-wireless infrared transmission according to claim 1 and 2, it is characterised in that: described audio signal amplifier (2) includes amplifier U2, and the model of this amplifier U2 is OPA172。
4. the D-type power amplifier of remote-wireless infrared transmission according to claim 1 and 2, it is characterised in that: described triangular signal generator based (3) are used for producing frequency is 500KHZ triangular wave；It includes amplifier U6 and comparator U4, and the model of described amplifier U6 is OPA172, and the model of described comparator U4 is TLV3202。
5. the D-type power amplifier of remote-wireless infrared transmission according to claim 1 and 2, it is characterised in that: described comparator module (4) includes comparator U3, and the model of this comparator U3 is TLV3202。
6. the D-type power amplifier of remote-wireless infrared transmission according to claim 1 and 2, it is characterized in that: described and series combination three grades of cascode amplification modules (7) include switching tube Q4, switching tube Q7, switching tube Q8, resistance R24, resistance R3, slide rheostat R15, slide rheostat R22 and slide rheostat R27, the emitter stage of switching tube Q4 respectively with the emitter stage of switching tube Q7, the emitter stage of switching tube Q8 connects, the base stage of switching tube Q4 is connected with the base stage of switching tube Q7, and the base stage of switching tube Q4 is connected with infrared receiving module (6) through resistance R3 with the junction point of the base stage of switching tube Q7, the colelctor electrode of switching tube Q4 is successively through slide rheostat R15, slide rheostat R22, the base stage of resistance R24 and switching tube Q8 is connected, and the junction point of slide rheostat R22 and resistance R24 is connected with the colelctor electrode of switching tube Q7, the junction point of slide rheostat R15 and slide rheostat R22 is connected with the colelctor electrode through slide rheostat R27 with switching tube Q8。
7. the D-type power amplifier of remote-wireless infrared transmission according to claim 2, it is characterised in that: described first drives submodule (8a) to include driver U1, and the model of this driver U1 is IR2110；Described second drives submodule (8b) to include driver U5, and the model of this driver U5 is IR2110。
8. the D-type power amplifier of remote-wireless infrared transmission according to claim 7, it is characterized in that: described full-bridge conversion module (9) includes metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q6 and metal-oxide-semiconductor Q9, described first drives submodule (8a) to be used for driving metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q3, and described second drives submodule (8b) to be used for driving metal-oxide-semiconductor Q6 and metal-oxide-semiconductor Q9。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620085040.5U CN205336232U (en) | 2016-01-28 | 2016-01-28 | D class power amplifier of remote wireless infrared transmission |
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| CN201620085040.5U CN205336232U (en) | 2016-01-28 | 2016-01-28 | D class power amplifier of remote wireless infrared transmission |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107786932A (en) * | 2016-08-26 | 2018-03-09 | 深圳市赛音电子有限公司 | A kind of audio test system |
| CN113162560A (en) * | 2021-05-19 | 2021-07-23 | 大连理工大学 | Implementation method of high-power low-distortion D-type power amplifier based on high-performance MCU |
| WO2023220861A1 (en) * | 2022-05-16 | 2023-11-23 | Techtronic Cordless Gp | Radio and radio circuit including dual controllers |
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2016
- 2016-01-28 CN CN201620085040.5U patent/CN205336232U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107786932A (en) * | 2016-08-26 | 2018-03-09 | 深圳市赛音电子有限公司 | A kind of audio test system |
| CN113162560A (en) * | 2021-05-19 | 2021-07-23 | 大连理工大学 | Implementation method of high-power low-distortion D-type power amplifier based on high-performance MCU |
| CN113162560B (en) * | 2021-05-19 | 2023-12-22 | 大连理工大学 | High-power low-distortion class D power amplifier implementation method based on high-performance MCU |
| WO2023220861A1 (en) * | 2022-05-16 | 2023-11-23 | Techtronic Cordless Gp | Radio and radio circuit including dual controllers |
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Granted publication date: 20160622 Termination date: 20170128 |