An extremely simple and inexpensive scheme for the protection of preamplifiers is reported. A protection scheme consisting of seven pairs of back‐to‐back diodes was used to measure low voltage level (<0.1 V), high frequency (400 MHz) signals with a relatively high gain of ∼35. The protection scheme could limit the voltage surge caused by a 100 kV breakdown in a compressed gas test gap to less than ∼3 V at the input of the preamplifier thereby providing adequate protection.
Topics
Amplifiers
REFERENCES
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A. L. Wintenberg, M. O. Pace and T. V. Blalock, IEEE International Symposium on Electrical Insulation, June 1988 (IEEE, Boston, MA, 1988), pp. 383–387.
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© 1991 American Institute of Physics.
1991
American Institute of Physics
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