lite.tbo: the bipolar HV-pulser
What does it look like?
What is it supposed to do?
The aim of this echOmod is to get the HV Pulse done.
How does it work: block diagram
About the module
- Cheaper, more robust than tobo
- Less issues with the MD0100
- As of today (20180305), the damper still lacks
Constraint and limits
- Needed to get a couple of 10's of ns wide square pulses, both in the positive and negative.
- Control of pulses must be through 3.3 or 5V tolerant logic
- Pulses height must be selectable (say with a jumper?) for ~20V, 40V, 80V (for positive pulses).
- Only power supply available is 5V
- See this application note - recommend MD1213 and TC6320
- Possible (but not used in the end) high voltage source: https://datasheets.maximintegrated.com/en/ds/MAX5025-MAX5028.pdf (3 -> 30V) to be used with a 555 DC-DC convertor
- Signal back from the diod is clipped by MD0100 + back to back diods.
- Needs only 5V
- HV: NMT0572SC
- Pulser : MD1213 and TC6320 -> see Fig.6 here, bipolar 3 level pulser.
- TC6320, undamped, detailed here.
- TC6320 http://ww1.microchip.com/downloads/en/DeviceDoc/20005697A.pdf for the datasheet
- Protection: MD0100+diods -- should be enough, see bottom of page 1, or Fig 9
- Review a bipolar design (originally alt.tbo -- but double the components and hence the price)
- Preliminary testing
- Ivan for the TC6320TG