Yaw rate sensor and method for operating a yaw rate sensor
AssigneeRobert Bosch GmbH
InventorsGuangzhao Zhang, Andrea Visconti, Francesco Diazzi, Ruslan Khalilyulin
Life of this patent
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Abstract
A yaw rate sensor having a drive for exciting an oscillation of an oscillatory mass, the drive having at least one drive amplifier circuit, and having a detector for detecting a displacement of the oscillatory mass, the detector having at least one detector amplifier circuit, either a low bias current being able to be set for operating the drive amplifier circuit and/or the detector amplifier circuit in an energy-saver mode, or a higher bias current being able to be set for operating the drive amplifier circuit and/or the detector amplifier circuit in a normal mode.
Claims9
A yaw rate sensor, comprising:
- a drive configured to excite an oscillation of an oscillatory mass, the drive having at least one drive amplifier circuit;
- a detector configured to detect a displacement of the oscillatory mass, the detector having at least one detector amplifier circuit;
- wherein either (i) a low bias current is able to be set for operating the drive amplifier circuit and/or the detector amplifier circuit in an energy-saver mode, or (ii) a higher bias current is able to be set for operating the drive amplifier circuit and/or the detector amplifier circuit in a normal mode,
- wherein the yaw rate sensor includes a reference-current generator configured to generate a reference current for the drive amplifier circuit and/or the detector amplifier circuit, the reference-current generator having a first field-effect transistor, the first field-effect transistor being a MOSFET, the first field-effect transistor having a first channel width which is alterable in order to adjust the low and/or higher bias current.
A mobile terminal, comprising:
- a yaw rate sensor, the yaw rate sensor including:
- a drive configured to excite an oscillation of an oscillatory mass, the drive having at least one drive amplifier circuit,
- a detector configured to detect a displacement of the oscillatory mass, the detector having at least one detector amplifier circuit,
- wherein either (i) a low bias current is able to be set for operating the drive amplifier circuit and/or the detector amplifier circuit in an energy-saver mode, or (ii) a higher bias current is able to be set for operating the drive amplifier circuit and/or the detector amplifier circuit in a normal mode;
- and
- an energy store to supply the yaw rate sensor with electrical energy
- wherein the yaw rate sensor includes a reference-current generator configured to generate a reference current for the drive amplifier circuit and/or the detector amplifier circuit, the reference-current generator having a first field-effect transistor, the first field-effect transistor being a MOSFET, the first field-effect transistor having a first channel width which is alterable in order to adjust the low and/or higher bias current.
A method for operating a yaw rate sensor having a drive configured to excite an oscillation of an oscillatory mass, the drive having at least one drive amplifier circuit, and having a detector configured to detect a displacement of the oscillatory mass, the detector having at least one detector amplifier circuit, the method comprising:
- either setting a low bias current for operating the drive amplifier circuit and/or the detector amplifier circuit in an energy-saver mode, or setting a higher bias current for operating the drive amplifier circuit and/or the detector amplifier circuit in a normal mode,
- wherein the yaw rate sensor includes a reference-current generator configured to generate a reference current for the drive amplifier circuit and/or the detector amplifier circuit, the reference-current generator having a first field-effect transistor, the first field-effect transistor being a MOSFET, the first field-effect transistor having a first channel width which is alterable in order to adjust the low and/or higher bias current.
Dependencies are inferred from the claim text.