Frequency warping for improving resonator signal-to-noise ratio
US6654470B1 · kind B1 · utility
4Cited by
10References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1999 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Jul 13, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/0426
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor circuit for use in measuring concentrations of an analyte in a fluid is comprised of a BAW sensor, a voltage variable capacitor connected to the sensor, an input which supplies a bias warping dc voltage to the voltage variable capacitor, and a resonant oscillator circuit. The resonant oscillator circuit detects the fundamental frequency of the sensor and produces a resonant signal frequency. The bias warping dc voltage applied to the voltage variable capacitor warps the resonant frequency of the circuit away from inharmonic noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.