Part Number: OPA177
Tool/software: WEBENCH® Design Tools
Dear designers,
I would like to excite a 100mH coil within a iron core so that it oscillates. with the iron core the coil is 100mH.
from a microprocessor aka teensy3.2 I use a true DAC 12Bit, which is a shifted signal 1.65V offset +1.65V output Swing.
however this has to be transformed into a 12 till 15Volt output swing without offset at 80Hz.
the idea is to use 4 Opamps:
1 Opamp for filtering MFB with amplification.
2 negative Offset
3 2 Opamps in Bridge configuration (non inverting and inverting to drive the coil).
the maximum current that is flowing through the coil is 18mA AC. (small coil)
Questions:
how do I calculate such a circuit comprised out of multiple opamps?
Can I do this from a single supply and how? are these the right opamps, and how would I know that they are right for this application?
further applications would include clean signals own made PCBs data processing at 16-20Bit.