Pyroelectric detector with feedback amplifier for enhanced low frequency response
US6340816B1 · kind B1 · utility
16Cited by
24References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 10, 1999 |
| Grant date | Jan 22, 2002 |
| Priority date | — |
| Expiry date | Feb 10, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J5/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pyroelectric detector circuit comprises a pyroelectric sensor element connected to a load resistor and to an input of a buffer amplifier having a feedback path for multiplying the resistance of the load resistor at non-zero frequencies. This feedback enables the use of a smaller load resistor which is multiplied to produce a higher effective load resistance necessary for proper low frequency response of the detector circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.