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US 12,620,952 B2Granted
Drive circuit for inductive position transducer system
AssigneeMitutoyo Corporation
InventorPatrick H. Mawet
Life of this patent
Estimating the term…
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AssigneeMitutoyo Corporation
InventorPatrick H. Mawet
Estimating the term…
An inductive position transducer system includes a drive circuit and an inductive position transducer with at least a first field generating coil. The drive circuit includes a resonant circuit portion and an amplifier portion. The amplifier portion comprises a current-driven single stage differential amplifier and is configured to provide an oscillating drive signal to the resonant circuit portion which results in a driving of the field generating coil (e.g., at a coil voltage which may be larger than a power supply voltage, such as over 2× larger). A controller may adjust a bias current that is provided to the amplifier portion to maintain the voltage across the field generating coil (e.g., at a specified voltage level). The amplifier portion may comprise CMOS transistors and may be fabricated on a chip (as part of a low-voltage CMOS integrated circuit) along with other portions of the inductive position transducer system.
An inductive position transducer system, comprising:
A method of operating an inductive position transducer system which includes an inductive position transducer comprising at least a first field generating coil having a first coil terminal, a second coil terminal and a coil impedance, the method comprising:
A drive circuit for utilization as part of an inductive position transducer system which includes an inductive position transducer comprising at least a first field generating coil having a first coil terminal, a second coil terminal and a coil impedance, the drive circuit comprising:
Dependencies are inferred from the claim text.