11:00 AM
12:00 PM
I present a many-channel digital feedback control system based on a field programmable gate array (FPGA). The FPGA was used to implement digital signal processing features including fast infinite-impulse response filters, lock-in detection and modulation, arbitrary waveform generation, and a touchscreen for experimental control. The FPGA connects to a custom baseboard with dozens of fast and slow analog-to-digital inputs and digital-to-analog outputs, and many digital inputs and outputs. This control system can support up to 10 servos updating at 100 MS/s, and potentially dozens of slow servos with analog inputs and digital or analog outputs. An initial experimental application was tested at Penn State where a prototype of this system was used to control the laser system to laser-cool and trap cadmium atoms.
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