Nonlinear current mirror for loop-gain control
US6181142A · kind A · utility
3Cited by
8References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1998 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Jul 21, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2417
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A nonlinear current mirror for loop-gain control incorporates a resistor in one section of a current mirror which produces a nonlinear transfer function for the current mirror. When the nonlinear current mirror is included as part of a capacitive displacement gauge the gain of the gauge varies as a function of the input to the current mirror which compensates for the change in gain caused by the probe capacitance. Accordingly, the distance range and/or frequency response of the capacitive displacement gauge is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.