Wide bandwidth probe using pole-zero cancellation
US4743839A · kind A · utility
27Cited by
5References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 19, 1986 |
| Grant date | May 10, 1988 |
| Priority date | — |
| Expiry date | Dec 19, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R1/06766
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.