Dear Colleagues, I propose to discuss the hybrid repeater in economy class A. Scheme hybrid repeater was assembled and tuned. Connects to the speaker system in three amping mode. The sound system is very good. Quiescent current is maintained machine is very accurate.
Attachments
hybrid repeater
Field of the Invention .
The invention relates to electronics and electrical engineering , namely to electronic amplifiers , in particular, to an audio amplifier Hi-Fi, Hi End class A.
BACKGROUND ART .
*In class AB amplifier main way to reduce the current instability in the operating point is thermal feedback bias voltage is generated in the sensor, which is mounted on the heat sink . Such a system has the following disadvantages : the inertia and aproksimizatsiya temperature sensor to the current peace. Such a system only simulates the change of the current in the output stage. These schemes do not allow precise adjustment is carried out directly in the quiescent operating point.
DISCLOSURE OF INVENTION .
Technical problem to be solved by the claimed repeater is to increase the accuracy and decrease the inertia measuring the quiescent current of the output stage .
The technical result achieved by the claimed significant decrease of inertia follower to maintain a constant value of the through current , which leads to increased stability of the repeater .
brief description
Field of the Invention .
The invention relates to electronics and electrical engineering , namely to electronic amplifiers , in particular, to an audio amplifier Hi-Fi, Hi End class A.
BACKGROUND ART .
*In class AB amplifier main way to reduce the current instability in the operating point is thermal feedback bias voltage is generated in the sensor, which is mounted on the heat sink . Such a system has the following disadvantages : the inertia and aproksimizatsiya temperature sensor to the current peace. Such a system only simulates the change of the current in the output stage. These schemes do not allow precise adjustment is carried out directly in the quiescent operating point.
DISCLOSURE OF INVENTION .
Technical problem to be solved by the claimed repeater is to increase the accuracy and decrease the inertia measuring the quiescent current of the output stage .
The technical result achieved by the claimed significant decrease of inertia follower to maintain a constant value of the through current , which leads to increased stability of the repeater .
brief description
Job Description repeater .
When using a repeater claimed its input connected to the analog output of the sound source , mainly , to the output of digital-to- analog converter and the output - to the playback device .
When the power source output voltage reference ( 24) begins to gradually increase a reference voltage which is supplied to one input of an operational amplifier ( 22). However, there is a smooth increase in the current at the measuring resistor ( 21).
The current from the first winding of the power transformer (18 ) via the rectifier diodes (19 ) is sent to the bus supply voltage V2. Further, current through the first (3 ) and second ( 4) flowing in the voltage follower bus supply voltage V3, where two rectifier diode (20 ) is directed into the second winding of the power transformer ( 18). Further, from the middle point of the second winding of the transformer ( 18 ), the current is directed to the measuring resistor ( 21). After the smoothing filter ( 23) with the measured voltage of the resistor (21 ) is supplied to the noninverting input of the operational amplifier ( 22). The error signal and the measured reference voltage is supplied to a current controlled oscillator ( 15) which regulates the current through the resistor (26 ) depending on said error signal . If at some point of the monitored current rise time , the error signal will fall on the conveyor ( 15) which increase its current. Voltage across the resistor (16) is reduced. Consequently , the voltage decreases by voltage regulator (12 ) ( in the implementation of Example 1 reduced the voltage on the gate-source voltage of the FET of the stabilizer ( 12) ) . This will lead to a decrease of the anode voltage on the lamp E (7 ) , which will decrease the cathode current of the lamp ( 7) and the current through the resistor ( 5 ) responsible for the displacement of the first (3 ) and second ( 4) voltage follower . The voltage at the control inputs of the repeaters (3, 4) is reduced , thereby reducing the current through the repeaters (3, 4 ), i.e. a decrease of the current through the measuring resistor and ( 21).
In the absence of the input signal (1 ), analog output ( 2) has a midpoint potential between V2 and V3. Because according to a preferred embodiment V2 =-V3, in the absence of the input signal (1 ), analog output ( 2) has a ground potential. When a signal is applied to the input (1) he repeated the voltage at the output (2).
Protection against short circuit operates as follows. If the input (1 ) is supplied with a positive polarity signal of high level , which passes through the first filter ( 11) and arrives at the control grid of the lamp (7 ), the connection point of the voltage follower (3, 4) has a midpoint potential between V2 and V3 mode ( short circuit ) . The control input of the first voltage follower (3 ) and a cathode lamps (7 ) have the potential slightly greater than the midpoint between the potential V2 and V3. When this protective Zener diode ( 9) begins to limit the input so as to reduce the power dissipated at the first voltage follower ( 3). If the input (1) signal is a negative polarity with a high level , the input signal will be limited protective Zener diode (10).
Thus, from the foregoing that the claimed follower claimed technical result : " a significant reduction in inertia to maintain a constant value through current , which leads to increased stability of the repeater " is achieved .
Through direct regulation ( measurement and changes ) quiescent current regulation no inertia , work and push-pull end stage occurs with a constant cross-cutting current, and maintain its accuracy does not depend on the temperature and voltage of the first ( 3 ) and second ( 4) of the voltage follower . After Driver stage ( electron tube ( 7) and the third voltage follower ( 8) ) occurs in the class A.
Industrial applicability .
Author made prototypes declared devices , testing which confirmed achieve a technical result .
The claimed invention is implemented using commercially available devices and materials can be collected at any of Radio and enterprise wide applications in electronics .
When using a repeater claimed its input connected to the analog output of the sound source , mainly , to the output of digital-to- analog converter and the output - to the playback device .
When the power source output voltage reference ( 24) begins to gradually increase a reference voltage which is supplied to one input of an operational amplifier ( 22). However, there is a smooth increase in the current at the measuring resistor ( 21).
The current from the first winding of the power transformer (18 ) via the rectifier diodes (19 ) is sent to the bus supply voltage V2. Further, current through the first (3 ) and second ( 4) flowing in the voltage follower bus supply voltage V3, where two rectifier diode (20 ) is directed into the second winding of the power transformer ( 18). Further, from the middle point of the second winding of the transformer ( 18 ), the current is directed to the measuring resistor ( 21). After the smoothing filter ( 23) with the measured voltage of the resistor (21 ) is supplied to the noninverting input of the operational amplifier ( 22). The error signal and the measured reference voltage is supplied to a current controlled oscillator ( 15) which regulates the current through the resistor (26 ) depending on said error signal . If at some point of the monitored current rise time , the error signal will fall on the conveyor ( 15) which increase its current. Voltage across the resistor (16) is reduced. Consequently , the voltage decreases by voltage regulator (12 ) ( in the implementation of Example 1 reduced the voltage on the gate-source voltage of the FET of the stabilizer ( 12) ) . This will lead to a decrease of the anode voltage on the lamp E (7 ) , which will decrease the cathode current of the lamp ( 7) and the current through the resistor ( 5 ) responsible for the displacement of the first (3 ) and second ( 4) voltage follower . The voltage at the control inputs of the repeaters (3, 4) is reduced , thereby reducing the current through the repeaters (3, 4 ), i.e. a decrease of the current through the measuring resistor and ( 21).
In the absence of the input signal (1 ), analog output ( 2) has a midpoint potential between V2 and V3. Because according to a preferred embodiment V2 =-V3, in the absence of the input signal (1 ), analog output ( 2) has a ground potential. When a signal is applied to the input (1) he repeated the voltage at the output (2).
Protection against short circuit operates as follows. If the input (1 ) is supplied with a positive polarity signal of high level , which passes through the first filter ( 11) and arrives at the control grid of the lamp (7 ), the connection point of the voltage follower (3, 4) has a midpoint potential between V2 and V3 mode ( short circuit ) . The control input of the first voltage follower (3 ) and a cathode lamps (7 ) have the potential slightly greater than the midpoint between the potential V2 and V3. When this protective Zener diode ( 9) begins to limit the input so as to reduce the power dissipated at the first voltage follower ( 3). If the input (1) signal is a negative polarity with a high level , the input signal will be limited protective Zener diode (10).
Thus, from the foregoing that the claimed follower claimed technical result : " a significant reduction in inertia to maintain a constant value through current , which leads to increased stability of the repeater " is achieved .
Through direct regulation ( measurement and changes ) quiescent current regulation no inertia , work and push-pull end stage occurs with a constant cross-cutting current, and maintain its accuracy does not depend on the temperature and voltage of the first ( 3 ) and second ( 4) of the voltage follower . After Driver stage ( electron tube ( 7) and the third voltage follower ( 8) ) occurs in the class A.
Industrial applicability .
Author made prototypes declared devices , testing which confirmed achieve a technical result .
The claimed invention is implemented using commercially available devices and materials can be collected at any of Radio and enterprise wide applications in electronics .
Currently, digital media is a major source of information practically . There are new digital formats with high resolution. The very process of recording information , takes place in the digital environment. The concept of analog amplification was laid decades ago and has not changed . Correctors , equalizer , preamplifiers , power amplifiers , do not forget operational amplifiers directly to CD or DVD device. That is a common analog amplification path consists of many electronic parts - resistors, transistors, capacitors , transformers, respectively, included in series. Correctors , equalizer , preamplifiers , power amplifiers connected in series interblock connectors. Method of successive amplification of sound signals , has exhausted itself . Since each electronic component particles information loss occurs . In general, a result significantly affected micro dynamics and overtones. It's time to change the ideology of building all the amplification path . It is proposed to abandon the usual sequential method of amplifying audio signals. Role entrusted to the voltage amplifier chip РСM1794A . Next, the amplified signal is sent to a powerful repeater . The repeater in this case is the main link . That it formed the main distortions . Therefore development aimed at creating high-quality repeaters. Developed. Highly efficient Class A Hybrid Repeater Repeater in economy class A. In the development of three band repeater in economy class A. To improve the quality of all the repeaters are made with the ability to connect three amping . With this method of amplification creates the shortest path in the world. The new ideology of digital high end , fully reveal the capabilities of digital formats with high resolution. All circuits and photo development will be on the forum.
The bolded statement in your post above leads to an important [patent] claim that the idle current in the repeater is highly stable; unlike the prior art solutions of bias control.
Hello Antoinel. Set quiescent current 1 A. Accuracy of current + - four miliampera . These schemes filed with the Eurasian Patent Application Society . Sounding hybrid repeater compared with symmetric single-cycle repeater . Inconspicuous difference ( by ear ) . Instrument nonlinear hybrid repeater more. When quiescent current 1 A. Power supply + and - 35 volts. Heatsink temperature through three hours was 42 degrees ! Radiators pictured small , fanless , and flipped the ribs to the table ! The second figure shows how changing power repeater + and - precisely maintained quiescent current . The last two columns show the change in the bias current . Transistors operate without cutoff current. Sound beautiful . Quick and upper bass without rustling . The sound is very transparent in great detail . Voltage amplifier chip PCM1794, Come to listen to Russia . Sincerely .
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Hello FEDOSOFF. Thank you for invitation. It was my pleasure E-meeting you on Utube. I look forward to your continued posts.
Best regards
Hello FEDOSOFF. Your amplifier is highly compact, has beauty, and is of professional quality. It appears to me that it maybe ready soon to be used as a demonstrator at an audio show, and/or at dealers of audio gear for customerappreciation and feedback. Congratulations for this important business milestone.
Hello Antoinel. Thank you for your congratulations. Dress Set inside alyuminevogo Angle bars. To him fasten transistors, thermal sensors. It turns out that the module can be screwed to the radiator. A couple of weeks there will be new photo. here http://www.diyaudio.com/forums/soli...epeater-crossover-economy-class-new-post.html see diagram three-band repeater. Sincerely.
Hello Antoinel. Pictured assembled serial module. Adjustment module adapted for installation in the 2U option is set by the module will be on the radiator. Lamp panel can be installed in the circuit board, then the size of the housing is 3U. Perhaps installing a module vertically into the candy bar.
Attachments
Hello FEDOSOFF. I am glad to hear from you, and also to examine/admire your detailed yet highly compact amplifier in your photos. I hope that your patent applications are on safe grounds and will grant soon.
Best regards
Best regards
Hello FEDOSOFF
I hope that you are well. Any news on your patent applications, and amplifiers.
Best regards.
I hope that you are well. Any news on your patent applications, and amplifiers.
Best regards.
Hello Antoinel. Hello colleagues, I present to your attention one of the variants of patented inverter current voltage on the current mirrors. I propose to discuss this option inverter current - voltage.This embodiment of the converter current - voltage may be applied to the buildup of any repeater.
Attachments
Thanks FEDOSOFF. Do I understand that you were granted one or more patents? This is great/awesome news; because now you can sell commercial [patented] amps like you showed in their pictures. Like others, I look forward to following your posts on this subject. Hopefully, the schematics which you may wish to show can be made clear.
Best regards
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