An interface circuit between a capacitance meter (PAR 410) and a microcomputer (Apple II) is presented. The interface circuit is constituted by a 12‐bit D/A converter and a 10‐bit A/D converter. A program has been written which utilizes the capacitance measurement for determination of physical parameters on both MOS devices and Schottky barrier diodes. The circuit is of general usefulness and can be adapted for other applications where capacitance measurements are of interest.

Topics
Analog-to-digital converter, Schottky diodes, Capacitance meter, MOS devices
1.
E. H. Nicollian and J. R. Brews, MOS (Metal Oxide Semiconductor) Physics and Technology (Wiley, New York, 1982), p. 591.
2.
C. Espinosa, Apple II Reference Manual, Apple Computer, Inc., Cupertino, CA, 1979.
3.
S. M. Sze, Physics of Semiconductor Devices, 2nd ed. (Wiley, New York, 1981), Chap. 7.
4.
D. V.
Lang
,
J. Appl. Phys.
45
,
3023
(
1974
).
Google Scholar
Crossref
Search ADS
 
5.
E. H. Nicollian and 3. R. Brews, MOS (Metal Oxide Semiconductor) Physics and Technology (Wiley, New York, 1982), p. 411.
This content is only available via PDF.
© 1985 American Institute of Physics.
1985
American Institute of Physics
You do not currently have access to this content.