StereoscanElectronics: Difference between revisions
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=Replacement Devices= | =Replacement Devices= | ||
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Simultaneous in phase data capture may be difficult. At minimum, all analog I/O devices will need to share the same clock, to begin conversion cycles simultaneously. | Simultaneous in phase data capture may be difficult. At minimum, all analog I/O devices will need to share the same clock, to begin conversion cycles simultaneously. | ||
=Rejected= | |||
The 24bit NI DAQ systems have disappointing low sample rates. | |||
Revision as of 07:09, 2 April 2014
Replacement Devices
Requirements
Scanning, e-beam lens correction, and image acquisition functions may need to be taken over by software and/or rapidly prototyped analog hardware. Complex synchronous waveforms may need to be synthesized at high-speed in response to other high-speed events. Internal voltages may range from 1uV-30kV.
- ~100kHz Analog I/O Bandwidth
- 209.5dB Dynamic Range
- At least 18 I/O channels.
- Synchronized timing.
- Limited duration waveform detection and synthesis. Digital sample-and-hold mechanisms may be feasible instead of realtime ultra-low-latency processing.
Architecture
Modern audio input devices (http://www.profusionplc.com/images/data%20sheets/at12612.pdf) can achieve approximately 120dB dynamic range at 192kHz sampling rates. The remaining dynamic range can be achieved through an amplifier with a programmable gain resistor, as the remaining 89.5dB (1V-30kV) is probably not needed continuously.
Simultaneous in phase data capture may be difficult. At minimum, all analog I/O devices will need to share the same clock, to begin conversion cycles simultaneously.
Rejected
The 24bit NI DAQ systems have disappointing low sample rates.