Sensor interface circuit and sensor module
US11954555B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | May 7, 2021 |
| Grant date | Apr 9, 2024 |
| Priority date | — |
| Expiry date | May 7, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K21/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A sensor interface circuit includes: an RF switch having a control node; a bias circuit electrically connected to the control node and applying, to the control node, a voltage at a first level or a second level corresponding to a linear region of a reflection characteristic; a first variable oscillation circuit electrically connectable to a first sensor; a second variable oscillation circuit electrically connectable to a second sensor; and a difference circuit electrically connected between the first variable oscillation circuit and the bias circuit, and between the second variable oscillation circuit and the bias circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.