The circuit you sent works just fine!
Thank you very much!!
I have a few questions..
1)At sample gate, before 'E' end, should i place a pull-up or pull-down (47K)?
2)Because my provider cannot find easily the LT's, could i replace them with AD8072?
3)From the coil, i get two pulses. One positive and one negative. So, i suppose that if i connect at + end of the first LT1215 the coil the other end will go to ground. This means that i will not be able to see the negative pulse. In this case, i suppose that i will use the first amplifier - circuit (from previous replies) and at the end i will use the sample-hold circuit.
4)If i do as said at 3), then, should i use a current supply between the coil and the first LT1215 (because of the large resistors)?
Thank you again for your time