Dynamic quantity detection device
First Claim
1. A dynamic quantity detection device comprising:
- a detection portion configured to detect a dynamic quantity applied from an outside and generate a sensor signal in accordance with the dynamic quantity;
a signal process portion configured to process the sensor signal from the detection portion to have a property suitable for an external device; and
an operation mode switch portion configured to switch an operation mode, whereinwhen the sensor signal output from the detection portion is less than or equal to a predetermined threshold value, the operation mode switch portion sets the operation mode to a power save mode by stopping an operation of the signal process portion, andwhen the sensor signal output from the detection portion is greater than the predetermined threshold value, the operation mode switch portion switches the operation mode to a normal mode by activating the signal process portion.
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Accused Products
Abstract
A dynamic quantity detection device includes a detection portion, a signal process portion, and an operation mode switch portion. The detection portion detects a dynamic quantity applied from an outside and generates a sensor signal in accordance with the dynamic quantity. The signal process portion processes the sensor signal from the detection portion to have a property suitable for an external device. When the sensor signal output from the detection portion is less than or equal to a predetermined threshold value, the operation mode switch portion sets an operation mode to a power save mode by stopping an operation of the signal process portion. When the sensor signal output from the detection portion is greater than the predetermined threshold value, the operation mode switch portion switches the operation mode to a normal mode by activating the signal process portion.
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Citations
9 Claims
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1. A dynamic quantity detection device comprising:
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a detection portion configured to detect a dynamic quantity applied from an outside and generate a sensor signal in accordance with the dynamic quantity; a signal process portion configured to process the sensor signal from the detection portion to have a property suitable for an external device; and an operation mode switch portion configured to switch an operation mode, wherein when the sensor signal output from the detection portion is less than or equal to a predetermined threshold value, the operation mode switch portion sets the operation mode to a power save mode by stopping an operation of the signal process portion, and when the sensor signal output from the detection portion is greater than the predetermined threshold value, the operation mode switch portion switches the operation mode to a normal mode by activating the signal process portion. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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2. A dynamic quantity detection device comprising:
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a detection portion configured to detect a dynamic quantity applied from an outside and generate a sensor signal in accordance with the dynamic quantity; a signal process portion configured to process the sensor signal from the detection portion to have a property suitable for an external device; a detection switch becomes an on-state when the dynamic quantity applied to the detection means is greater than a predetermined threshold value; and a operation mode switch portion configured to switch an operation mode, wherein when the detection switch is in an off-state for a predetermined time, the operation mode switch portion sets the operation mode to a power save mode by stopping operations of the detection portion and the signal process portion, and when the detection switch becomes the on-state, the operation mode switch portion switches the operation mode to a normal mode by activating the detection portion and the signal process portion.
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Specification