EP0098651A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Temperature sensor
Assignee: Koninklijke Philips NV
•
Filing: 1983-06-29
•
Granted: —
•
Expires: 2003-06-29
Abstract
Abstract A temperature sensor having an oscillator circuit comprising a plate-shaped quartz crystal resonator formed using a cut rotated singly through an angle Θ about the X axis, Θ being in one of the ranges -29° to -16° and +39° to +45°, and electrodes are provided on the major surfaces of the resonator to make the resonator vibrate in a thickness shear mode at a frequency which varies substantially linearly in a selected temperature range.
Inventors
- 👤 Cornelis Franx
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 10:20
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/32
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
A temperature sensor including an oscillator circuit comprising a crystal resonator in the form of a substantially plane-parallel plate cut from a quartz crystal, the crystal resonator having, in response to an electric field, a mode of vibration with a predominantly linear frequency-temperature characteristic over a selected temperature range, and electronic oscillator means to generate and apply the electric field to the crystal resonator, characterized in that the plate is formed using a crystal cut rotated singly through an angle θ about the electrical axis of the crystal, θ being in one of the ranges -z9°≤ 8 ≤ -16° and +39°≤ θ ≤ +45° and that the major faces of the plate are provided with respective electrodes to make the plate vibrate in a thickness shear mode.
Claim 2
Dependent Claim
127 words
A temperature sensor including an oscillator circuit comprising a crystal resonator in the form of a substantially plane-parallel plate cut from a quartz crystal, the crystal resonator having, in response to an electric field, a mode of vibration with a predominantly linear frequency-temperature characteristic over a selected temperature range, and electronic oscillator means to generate and apply the electric field to the crystal resonator, characterized in that the plate is formed using a crystal cut rotated singly through an angle θ about the electrical axis of the crystal, θ being in one of the ranges -z9°≤ 8 ≤ -16° and +39°≤ θ ≤ +45° and that the major faces of the plate are provided with respective electrodes to make the plate vibrate in a thickness shear mode.
Claim 3
Dependent Claim
23 words
A temperature sensor as claimed in Claim 1, characterized in that the temperature range is from 20°C to 80°C and θ = -26°.
Claim 4
Dependent Claim
23 words
A temperature sensor as claimed in Claim 1, characterized in that the temperature range is from 0°C to 150°C and θ = -23°C.
Claim 5
Dependent Claim
23 words
A temperature sensor as claimed in Claim 1, characterized in that the temperature range is from -25°C to 95°C and θ = -28°.
Claim 6
Dependent Claim
23 words
A temperature sensor as claimed in Claim 1, characterized in that the temperature range is from 50°C to 275°C and θ = -17°.
Claim 7
Dependent Claim
23 words
A temperature sensor as claimed in Claim 1, characterized in that the temperature range is from 50°C to 275°C and θ = +43°.
Claim 8
Dependent Claim
16 words
A crystal resonator for a temperature sensor as claimed in anyone of Claims 1 to 6.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.