Magnetic sensor reading device, system and method
First Claim
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1. A device, comprising:
- signal processing circuitry configured to receive a detection signal indicative of one or more characteristics of a magnetic field and to generate an output signal as a function of said detection signal, the signal processing circuitry having a range of full-scale gain settings; and
control circuitry communicatively coupled to said signal processing circuitry, wherein the control circuitry, in operation, automatically selects a full-scale gain setting of the range of full-scale settings of the signal processing circuitry, the selecting including responding to detection of saturation of the signal processing circuitry by iteratively selecting full-scale gain settings of the range of full-scale gain settings of said signal processing circuitry, until an absence of saturation of said signal processing circuitry at the selected full-scale gain setting of the signal processing circuitry is detected, and saturation of the signal processing circuitry is detected based on the output signal of the signal processing circuitry.
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Abstract
A reading circuit for a magnetic-field sensor, provided with a detection structure generating an electrical detection signal as a function of an external magnetic field, has a signal-conditioning stage, which is electrically coupled to the detection structure and generates an output signal as a function of the electrical detection signal; the reading circuit is provided with a full-scale-control stage that is able to select automatically a full-scale value for the signal-conditioning stage, as a function of the value of the external magnetic field, such as to prevent saturation of the same conditioning stage.
22 Citations
18 Claims
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1. A device, comprising:
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signal processing circuitry configured to receive a detection signal indicative of one or more characteristics of a magnetic field and to generate an output signal as a function of said detection signal, the signal processing circuitry having a range of full-scale gain settings; and control circuitry communicatively coupled to said signal processing circuitry, wherein the control circuitry, in operation, automatically selects a full-scale gain setting of the range of full-scale settings of the signal processing circuitry, the selecting including responding to detection of saturation of the signal processing circuitry by iteratively selecting full-scale gain settings of the range of full-scale gain settings of said signal processing circuitry, until an absence of saturation of said signal processing circuitry at the selected full-scale gain setting of the signal processing circuitry is detected, and saturation of the signal processing circuitry is detected based on the output signal of the signal processing circuitry. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system, comprising:
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a detection structure configured to generate an electrical detection signal as a function of a magnetic field; and reading circuitry configured to; generate an output signal based on the electrical detection signal generated by the detection structure; and automatically select a full-scale gain setting of a range of full-scale gain settings of the reading circuitry based on the output signal, wherein said reading circuitry is configured to respond to detection of saturation of the reading circuitry by iteratively selecting full-scale gain settings of the range of full-scale gain settings until an absence of saturation of said reading circuitry is detected, and to detect saturation of the reading circuitry based on the output signal. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method, comprising:
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receiving an electrical detection signal indicative of at least one characteristic of a magnetic field; generating, using a reading circuit, an output signal based on the electrical detection signal, the reading circuit having a range of full-scale gain settings; and automatically selecting a full-scale gain setting of the range of full-scale gain settings of said reading circuit based on the output signal, wherein the selecting the full-scale gain setting comprises responding to detection of saturation of the reading circuit by iteratively selecting full-scale gain settings of said reading circuit until an absence of saturation of said reading circuit is detected, and saturation of the reading circuit is detected based on the output signal of the reading circuit. - View Dependent Claims (15, 16, 17, 18)
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Specification