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Something must be terribly wrong with my circuit. As is now clear I hopemost of the ‘benefits’ are an illusion, and can easily lead to tears if the warnings here aren’t heeded. In many cases, the lowest heat output possible is highly desirable, and HEXFETs are simply unsuited to any application where very low Iq is desirable or necessary. If no, then what should I change in power supply??? Should V th fall by mV, Iq can only increase by mA.
(PDF) 2SJ201 Datasheet download
Even this will not show the same effects as a true valve amp – the nature of the distortion components will almost certainly be different. Alright, now for some datashret. A few tens of millivolts of gate voltage is the difference between acceptable quiescent current and overheating. They still need thermal compensation and a suitable gate drive design, and can suffer from a ‘latch-up’ condition in some cases.
For stereo you have to double the current of 2wj201.
Could the root of this problem be an overheated transistor when soldering? Each has its own strengths and weaknesses which forces us to vatasheet between them.
2SJ201 PDF Datasheet浏览和下载
It can also cause major problems in switching circuits, but that’s another topic altogether and will not be covered here. But if we use a matching tool, we will find that the gain varies considerably from the actual devices vs. In every practical design I have tried I had to use a class AB driver stage.
To balance out the nonlinear curve, we can simply cut if off where it seems too bad by using bias. Sir, Can you please provide the PCP layout. These devices are now obsolete, but they were ddatasheet for V GS offwith ‘0’ classed devices having a threshold voltage of 0. These drivers Q7 and Q8 may need a heatsink.
2SJ MOSFET Datasheet pdf – Equivalent. Cross Reference Search
Hi Mike you can try is the standing current is not raising to required level with R8, you may have to raise R8 to 4.
Note that the article above does not address this potential failure mode, nor do many othersand your only choice is to find MOSFETs where the thermal ‘changeover’ occurs at the lowest possible drain current. Now daatsheet R8 so that the multimeter reads V DS sat will normally be in the order of darasheet 12V gate shorted to drain at a current of amps, so R DS on is in the order of 1. Don’t add these yet! You are welcome to visit us for culture exchange and mutrual business development and progress.
This is a minefield, and I suggest that you tread very carefully. Any suggestions on where the error could be located? The value for R7 will depend on the linearity of the driver transistors.
And many pages from ESP. The test I ran was very simple. Sign up for price alert. We will find each device’s needs individually.
Your email address will not be published. The use of source resistors to help force current sharing is essential, and these should be 2aj201 high as practicable. While this is true to an extent, it is obvious that it is not a general rule upon which one should rely in all circumstances. Will the preamp be helpful in datasheeh gain? The spec is given below, also I have some doubts regarding the project. It will continue to cause problems if designers are unaware that this failure mode even exists – after all, most comments seen describe MOSFETs as almost indestructible.