Wide bandwidth probe using pole-zero cancellation

Details Wide bandwidth probe using pole-zero cancellation Wide bandwidth probe using pole-zero cancellation

1986-12-19

1988-05-10

Tokar, Michael J.

Electricity: measuring and testing

Testing potential in specific environment

Voltage probe

324121R, G01R 3102

Patent

active

047438398

ABSTRACT:
A probe apparatus for use with analyzing devices, primarily oscilloscopes, which uses pole-zero cancellation to provide a probe with low capacitance and wide bandwidth. Pole-zero cancellation enables the probe to have constant gain at all frequencies. In one embodiment, the coaxial cable between the probe tip and the replication amplifier is terminated in its characteristic impedance to provide constant gain at all frequencies regardless of cable length. Use of pole-zero cancellation and thick film technology enables building a probe with a small, durable tip.

REFERENCES:
patent: 2881400 (1959-04-01), Rogers
patent: 3015080 (1961-12-01), Santelmann, Jr. et al.
patent: 3906344 (1975-09-01), Addis et al.
patent: 4260951 (1981-04-01), Lewyn
patent: 4486862 (1984-12-01), Wyber
Finch et al., "Miniature Oscilloscope Probes for Measurements in Crowded Circuits", Apr., 1977, pp. 9-12, Hewlett-Packard J.

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