| ??? 01/14/06 02:05 Read: times |
#107371 - RE : Answers III Responding to: ???'s previous message |
Yes, very often. In the old days of analog scope I turned-off all the lights, sat directly in front of the scope with my nose nearly hitting the screen and looked at the screen like the mouse looks at the snake. There were lots of situations where I had to use all these subtil features the scope offered... What a great time you had. I am feeling a little lazy to add this feature , Since this is going to place at the input stage it should need much care. No buffer, but a low pass filter. Thanks a lot Kai, I will do the PCB just like that. The range of adjustment is much much too high. I'll add some resistors there to limit the adjustment range. I guess, at Vgs = -0.6V Ids will be about 5mA for the BF245B. Take care, FETs show drastical manufacturing tolerances, much much higher than bipolar transistors. So, you will need a handful of them to get a properly matched pair. I'll do my best to find the best to find the best match. In the Pre-Gain Division Stage there are still some errors! I'll take a precise look to correct such mistakes today. Dear Kai, do you have any suggestion rearding my post about Something to dissipate 0.7 to 1.2 V P.S. : The reason that I am asking this much of questions(in different topics) in the same time is simply that I want to get all of my Double-Sided PCBs made together which would save me some money. Farshid |
