Thank you FEDOSOFF for your clarifications, and for the clarity of the language in your post. It is great news to learn that you have three patent applications. My congratulations. As you know, a granted patent is both a legal and a business document. Also, I think that during this application phase of your patents, you maybe able to produce and sell your amplifiers; clearly unless there is an unforseen conflict with other patents, prior art, etc.
Todate, the shortest signal path [tract] known has always been and still is inside the compact disc player. It gives both a high impedance [RCA] and a low impedance headphone output ports; with digital and/or manual volume control. Your post above says that you have invented an even shorter, and better signal path than this prior art.
Best regards.
Hello Antoinel. Adjusting the volume at the same time - analog , digital and robot over SPDIF. Digital volume is set to maximum. Robot adjustable analog. In the absence of the desired nominal robot you want to install a larger amount, and the desired gain obtained by parallel connection of additional resistor. Applied chips - PCM1794A x 2 generator SIT5001, receiver WM8804. Four low-noise stabilizer 5.5 volts. Four low-noise stabilizer 3.3 volts. Top level. Instead of the network rectifier set . Power supply 12 pieces 12 volt batteries. Each battery has its own controller . In this case, the noise is very small . This configuration is best suited for creating control - studio amplifier.
Hello FEDOSOFF. I look forward [when the time is right] to see the schematics of your description above. I looked at the datasheet of PCM1794{now known as DB} at the Texas Instruments site. Here is what it shows for the benefit of the readers of this thread:
- The analog output of PCM1794 is ~ +/ 8 mA for the Left and ~+/- 8 mA for the Right channels.
- Focus only on the R channel. This dual current enters an additional external circuit called an I/V converter-filter which has 3 operational amps.
- The maximum output voltage from the last stage operational amplifier is reported by TI to be ~13 V-pp as seen in Figure 25 or 26 of the datasheet.
- Is it possible that the Texas Instruments DAC circuits I described above are already in high quality CD players with digital [remote ] volume control? Maybe the available output voltage at the headphone/RCA ports of the CD players are lower [6-8 Vpp] than those you show in your schematics.
- I then can readily connect these analog outputs from the CD player to a unity gain power buffer like a diyF4 from First Watt. Will my or anybody else's practice bypass or defeat your patent application by making it appear to be prior art? Also, the other concern is that your specific invention may not be easily regulated or legally enforced! Many DIYers and audiophiles maybe practicing this approach already by not using a classical preamp between the CD player outputs and the power amp.
Hello Antoinel. You describe the classical solutions . Three op-amps in the audio path after the PCM1794 is a very , very long series circuit . My decision. Remove the three operational amplifiers . The volume control will inverter current - voltage . Connect the controller to the current output level PCM1794A . With the chip removed AC + - 2.5 mA at 0 dB. Output current creates an alternating voltage across sound level control . Desired level of AC voltage is determined by the resistor. In place of a single volume control scheme can be set tonkompensirovanny volume control or combined passive node volume and tone adjustments . For one volt AC voltage requires 430 ohm resistor . For twenty volts AC voltage requires a resistor 430 Ohm x 20 = 8600 ohms. This description is not specified how this is done in practice. However, the method of calculation of the AC voltage specified, true. Probably in early summer will be the decision to grant the patent. Then in the early summer is a schematic diagram of a current voltage converter . Sincerely .
Hello Antoinel This international application is published. See the link:
RU2014000255 SINGLE-ENDED AMPLIFIER WITH DIGITAL INPUT, AND DIGITAL-TO-ANALOG CONVERTER AND VOLTAGE FOLLOWER FOR SAID AMPLIFIER
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Ask do not hesitate to contact with any questions.
RU2014000255 SINGLE-ENDED AMPLIFIER WITH DIGITAL INPUT, AND DIGITAL-TO-ANALOG CONVERTER AND VOLTAGE FOLLOWER FOR SAID AMPLIFIER
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Ask do not hesitate to contact with any questions.
Hello FEDOSOFF. I hope that you are well. Thank you for the published reference of your patent application. I am glad for machine translation to English. I'll continue to study the application and its schematics, and ask questions as they arise.
Best regards.
Hello Colleagues. The output stage is changed. Input set field-effect transistor. Formed by the cascade of Sziklai. This significantly increased the linearity of the repeater. And lowered the output impedance. In the new mono block three repeater. Input filter enabled, this will create three stripes. Previously nonlinear distortions were within these limits - THD 1W-0.012%. 2.25 watts.-0.015%. 4W-0.020% 6.25 W-0.025 9W-0.033% 12W-0.041% 16w-0.051% 20W-0.063% 25W-0.077% 64 watts. - 0.18%. In the new mono block
2.25 watts.-0.0012%. 6.25 W-0.0014. 12,25 W-0.0017% 25W-0.0022% 42,25 watts. - 0.0025%.
2.25 watts.-0.0012%. 6.25 W-0.0014. 12,25 W-0.0017% 25W-0.0022% 42,25 watts. - 0.0025%.
Attachments
The first roller assembly acoustics https://www.youtube.com/watch?v=eGIxB67I7sg second video with the music group ROSKETS -2015god second composition https://www.youtube.com/watch?v=sCJq5Fymbsg third drive roller https: //www.youtube.com/watch?v=vudZ8O3ZWUQ music band SONATA ARCTICA. Fourth clip https://www.youtube.com/watch?v=-exDpp8wCyg instrumentals with a test drive. Another roller assembly is monoblock and videos with sound.
Hello FEDOSOFF. I'm glad you are back on line. The first video did not run. Hope that you show the amp
Hello friends.Several withdraw roller with raznыmy and Music fragments. №4 chokolats https://www.youtube.com/watch?v=5yaTck4ekqE №5 Don Ray https://www.youtube.com/watch?v=1Cn4CD3aJZI №6 Bino https://www.youtube.com/watch?v=xFixfEeXWtA №7 La Bionda https://www.youtube.com/watch?v=v7wUyi31nHs №8 еще одна La Bionda https://www.youtube.com/watch?v=MvLCUaIOrmo №9 Kim Wilde https://www.youtube.com/watch?v=KpdLa1l80RE №10 Dire Straits https://www.youtube.com/watch?v=V-fkDST0RBI №11 kingoom come https://www.youtube.com/watch?v=MnyBMtIeQxk №12 DIAMOND RAIN https://www.youtube.com/watch?v=rt4sS8IyDsc №13 Валерий Ободзинский №14 гр. РОНДО оцифровка ленты, альбом Турнепс - кассета https://www.youtube.com/watch?v=tcxEJ5MNuWo №15 АРАМИС https://www.youtube.com/watch?v=tk1fZc4f-qs №16 Божья Коровка - Гранитный камушек https://www.youtube.com/watch?v=V6b_7gyRpLY №17 Кай Метов - Position 2 https://www.youtube.com/watch?v=s_d3SEr37Fc №18 АНОНС https://www.youtube.com/watch?v=BVDa4hdnPmw №19 СИНЯЯ ПТИЦА https://www.youtube.com/watch?v=NKmuRIpw_G4
From the experience - the best option for implementing a powerful repeater is a monoblock with flowing, water cooling. This construction allows us to obtain high power, dramatically simplifies the stabilization of regimes, reduces the weight and cost of the entire structure as a whole. Strictly speaking, the regimes remain unchanged, since the removal of thermal energy depends little on the environment and, in fact, thermostabilization can be ruled out. The rate of heat extraction (the heat sink temperature) is controlled by the flow rate. It is necessary to take into account that class "A" amplifiers require the use of a power source with a very low level of ripple. It is desirable to use stabilized food in the output stages of those working in class A. For example, the stabilizer, published in the journal RADIO number 12 for 2015. Parameters of the repeater on low-level signals, for a load of 4 Ohms at a resting current of 5 Amps. 1 W. - 0.0006%, 2.25 W.- 0.0012%, 6.25 W-0.0014, 12.25W -0.0017%, 25W-0.0022%, 42.25W. - 0.0025%. The interference at the output of the repeater was 0.4 millivolts. To reduce noise, the parallel connection of the BTT is used. The noise is reduced by N times, where the number of parallel connected BTTs. The noise of the power supply is reduced by such a repeater 45 times. It should be noted that the noise penetrating the output of the repeater from the power bars creates side components in the signal spectrum, worsen its linearity and dynamic range at small and ultra-small signal levels, since low-frequency components fall in the frequency band of interest. Obviously, the repeater has an enormous margin of linearity on the quietest signals and in detail processing the first WATT of the system. Pros - simplicity, good linearity. The quiescent current is equal to the current in the load. The repeater is not afraid of a long-term fault in the load !!! Complementary configuration provides a first-class version of the repeater with small non-linear distortions. The repeater has a high resolution and is able to transmit all the smallest overtones of the audio signal. The output signal contains significantly less than the higher harmonics and with a smaller amplitude. With all this, there is an additional intriguing moment associated with the reduction of even harmonics and the possibility to set the same balanced currents in each circuit individually, which further linearizes the output stage, and eliminates the spread of the parameters of active elements in the repeater's arms. This construction of the output stage allows obtaining good linearity and using active elements without selection. The same balance currents are set automatically by the service system. Another important factor, the repeater has a zero input and output potential, a small input current, namely tenths of a milliampere, or when it does not go into AV mode, actually neutralizes even harmonics. The repeater operates with a quiescent current equal to the current in the load at maximum output power. Since the current mode of the output transistors is constant, respectively, the current transmission coefficient is constant. The repeater thus, in fact, operates at one point of its transfer characteristic. Accordingly, on a nonstationary signal, the current gain in the low-current and high-current regions of the repeater is constant. Hence, the correctness of the reproduction of envelopes is a formant. Due to the absence of the envelope deflection, the higher harmonics - the overtone of real musical instruments (having a level of millivolts) do not change during the passage through the repeater. Moreover, the high-frequency register of audio signals is not only the high-frequency signals themselves, but also primarily the harmonics of the mid-frequency spectrum. From the ensuing follows - different amplitudes of the input signal (one frequency), amplified with the same current gain. In addition, with the current unchanged, there are no temperature changes in semiconductors. Thus, there are no thermal distortions completely.
Below is description, forum and patents. Http: //www.eapo.org/en/publications/b ...
Http: //audioportal.hi-fi.ru/archive/i ...
Https: //www.youtube.com/watch? V = JK9jl ... http://eapatis.com/eaSearch/ms.exe?;E...|4|QL|NONEED$EA201300368A*%5CID https: //patentscope.wipo.int/search/r ...
Vladimir Fedosov
Below is description, forum and patents. Http: //www.eapo.org/en/publications/b ...
Http: //audioportal.hi-fi.ru/archive/i ...
Https: //www.youtube.com/watch? V = JK9jl ... http://eapatis.com/eaSearch/ms.exe?;E...|4|QL|NONEED$EA201300368A*%5CID https: //patentscope.wipo.int/search/r ...
Vladimir Fedosov
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