Title :
A scanning tunneling microscope control system based on fast microcontrollers
Author :
Bredekamp, A.H. ; Tapson, J.
Author_Institution :
Sch. of Electr. Eng., Cape Technikon, Cape Town, South Africa
Abstract :
This paper describes the novel design and implementation of a fast feedback controller for a scanning tunneling microscope (STM). The system, which is required to control the Z-axis displacement of the piezoceramic STM scanner, replaces the conventional DSP controller with fast 8-bit microcontrollers which have only limited DSP capability. The lateral or XY control movement is implemented on a separate microcontroller. The control electronics are connected to a PC, which performs the image storage, analysis and display
Keywords :
control system synthesis; feedback; microcontrollers; micropositioning; scanning tunnelling microscopy; two-term control; 8-bit microcontrollers; PI control; STM; XY control movement; Z-axis displacement; control electronics; fast feedback controller; fast microcontrollers; image analysis; image display; image storage; piezoceramic STM scanner; scanning tunneling microscope control system; Adaptive control; Control systems; Digital signal processing; Displacement control; Image analysis; Image storage; Microcontrollers; Microscopy; Piezoelectric materials; Tunneling;
Conference_Titel :
Communications and Signal Processing, 1998. COMSIG '98. Proceedings of the 1998 South African Symposium on
Conference_Location :
Rondebosch
Print_ISBN :
0-7803-5054-5
DOI :
10.1109/COMSIG.1998.736953
