5/29/2023 0 Comments Mosfet ipulse speaker driver![]() In fact, if you resume the calculations, you will notice that: for 8 ohms and you need more MOSFET's in parallel for a safe operation. ![]() So, in this case if yo u take the minimum load of 4 ohms, you should use several MOSFET's in parallel. Polarization current in class A will be a maximum of 8.175 / 2 = 4.08A. For example, if we assume minimum output impedance admitted to be equal to 4 ohms, the peak current would be I_peak = 32.7 V/4 Ohm = 8.175 A. For audio amplifier to work perfectly in class A, he need be biased to half the peak current on the lowest impedance supported. You amplifier diagram have a supply voltage of 32.7 Vdc per branch or +/-32.7Vdc. But both, above and below, where the intended use of less than 12 ohm impedance on the output MOSFET is not enough one, but you have to use several MOSFET's in parallel. So, the top MOSFET, the positive supply side, is a constant current source for the bottom MOSFET will work in class A. Was well if you numbered electronic components in the amplifier diagrams. To explain in more detail what I meant in previous post. The sound I get with my speakers is outstanding. Try it with full confidence, it will not be disappointed. Would improve the linearity even more than is actually obtained. Believe it!.ĭegeneration could be implemented in the LTP, yes. With respect to the first connection, no plop in speaker!. The variation of the signal excursion present there is rather low, therefore does not influence too. The CCS (input) gets zero current variation (considering two decimal places, eg 8.67 mA) for a variation of positive supply voltage between 4.9 and 37.1 volts. Try it if you want if you have questions. This is laboratory tested.Ġ.6 V / 33 K = 18 uA (may be close to that, but it's no problem). The CCS (output) gets zero current variation (considering three decimal places, eg 1.128 Acc) for a variation of output voltage excursion between + - 11.08 volts peak and between a variation of positive supply voltage between 4.9 and 37.1 volts.
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