High voltage, low noise piezo driver

For more details, see our paper on the ArXiv: [[http://arxiv.org/abs/1609.03607]]

Release notes:

v1.2

• Teensy 32-bit ARM microcontroller used (MK20DX256VLH7)
• Voltage monitor now directly proportional to output voltage
• LP corner capacitor switch now properly biased at 2.5V (may have been true in v1.1 too).

v1.2 errata

• Voltage reading on MCU ADC not linear over full span; will require buffer after voltage divider.

Planned implementation in codebase:

• "unlimited digital integrator" -- uController integrates mod_in to zero with some given timeconstant. (DONE)
• scan module -- generate output scan/sweep. (easy to do, but need to find time. Stub scan_module.h file in code already)
• easier integration with eurocard backplane
• ... other?