SENSOR CONTROL CIRCUIT AND SENSOR
First Claim
1. A sensor control circuit for controlling a sensor unit for measuring a physical value, comprising:
- a timing controller configured to select periodically at least one sensor unit among a plurality of sensor units and convert an output signal from the sensor unit to a continuous serial input signal;
an oscillator configured to receive the continuous serial input signal input by the timing controller and output a frequency signal corresponding to the output signal detected by the sensor unit;
a counter configured to count for a predetermined duration a number of pulses of the frequency signal which is output from the oscillator;
a data converter configured to convert the number of pulses to voltage data and output the voltage data; and
an RLC selector configured to input to the data converter an information indicating a characteristic value on which the number of pulses counted by the counter is based,wherein the characteristic value is one of resistance, inductance and electrostatic capacitance, and the plurality of sensor units are configured to measure a plurality of physical values, respectively.
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Accused Products
Abstract
A sensor control circuit for controlling a sensor unit for measuring a physical value includes a timing controller which selects periodically one or more sensor units among multiple sensor units and converts an output signal from the sensor unit to a continuous serial input signal, an oscillator which receives the serial input signal input by the controller and outputs a frequency signal corresponding to the output signal detected by the sensor unit, a counter which counts for a predetermined duration a number of pulses of the frequency signal output from the oscillator, a data converter which converts the number of pulses to voltage data and outputs the data, and an RLC selector which inputs to the converter information indicating a characteristic value on which the number of pulses is based. The characteristic value is resistance, inductance or electrostatic capacitance. The sensor units measure physical values, respectively.
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Citations
7 Claims
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1. A sensor control circuit for controlling a sensor unit for measuring a physical value, comprising:
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a timing controller configured to select periodically at least one sensor unit among a plurality of sensor units and convert an output signal from the sensor unit to a continuous serial input signal; an oscillator configured to receive the continuous serial input signal input by the timing controller and output a frequency signal corresponding to the output signal detected by the sensor unit; a counter configured to count for a predetermined duration a number of pulses of the frequency signal which is output from the oscillator; a data converter configured to convert the number of pulses to voltage data and output the voltage data; and an RLC selector configured to input to the data converter an information indicating a characteristic value on which the number of pulses counted by the counter is based, wherein the characteristic value is one of resistance, inductance and electrostatic capacitance, and the plurality of sensor units are configured to measure a plurality of physical values, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification