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Circuit for turning on and off sensor

A technology for switching sensors and circuits, applied in electronic switches, electrical components, pulse technology, etc., can solve the problems of unattainable power consumption, reduced circuit response speed of switching sensors, etc., to achieve the effect of saving size and simplifying the manufacturing process

Inactive Publication Date: 2013-02-13
WUXI LER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the input voltage of the switch sensor is 3V, even if a sleep circuit is added to the switch sensor, its power consumption still cannot reach below 3μW, and the added sleep circuit will reduce the response speed of the switch sensor circuit instead.

Method used

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  • Circuit for turning on and off sensor
  • Circuit for turning on and off sensor
  • Circuit for turning on and off sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Such as figure 1 As shown, the circuit for switching sensors provided by this embodiment includes a TMR (tunneling magnetoresistance) element 1 , a resistor 2 , a first current source 3 and a second current source 4 . The TMR element 1 is electrically connected to a first current source 3 . The resistor 2 is electrically connected to the second current source 4 . The TMR element 1 is electrically connected to the resistor 2, and the node between the TMR element 1 and the resistor 2 is connected to, for example, a power source (not shown in the figure). The first current source 3 is electrically connected to the second current source 4 , and the node between the first current source 3 and the second current source 4 is, for example, grounded. The TMR element 1, the resistor 2, the first current source 3 and the second current source 4 are respectively electrically connected as a bridge arm to form a bridge. The output terminals of the bridge are Out1 and Out2.

[002...

Embodiment 2

[0024] Such as figure 2 As shown, the circuit for switching sensors provided by this embodiment includes a TMR element 1 , a resistor 2 , a first current source 3 and a second current source 4 . The TMR element 1 is electrically connected to a first current source 3 . The resistor 2 is electrically connected to the second current source 4 . The TMR element 1 is electrically connected to the resistor 2, and the node between the TMR element 1 and the resistor 2 is, for example, grounded. The first current source 3 is electrically connected to the second current source 4 , and a node between the first current source 3 and the second current source 4 is connected to a power supply (not shown in the figure), for example. The TMR element 1, the resistor 2, the first current source 3 and the second current source 4 are respectively electrically connected as a bridge arm to form a bridge. The output terminals of the bridge are Out1 and Out2.

[0025] The temperature coefficients ...

Embodiment 3

[0027] Such as image 3 As shown, the circuit for switching sensors provided by this embodiment includes a TMR element 1 , a resistor 2 , a first current source 3 , a second current source 4 , a variable gain amplifier (VGA) 5 and a comparator 6 . The TMR element 1 is electrically connected to a first current source 3 . The resistor 2 is electrically connected to the second current source 4 . The TMR element 1 is electrically connected to the resistor 2 , and the node between the TMR element 1 and the resistor 2 is connected to a power supply (not shown in the figure), for example. The first current source 3 is electrically connected to the second current source 4 , and the node between the first current source 3 and the second current source 4 is, for example, grounded. The TMR element 1, the resistor 2, the first current source 3 and the second current source 4 are respectively electrically connected as a bridge arm to form a bridge. The node between the TMR element 1 and...

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PUM

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Abstract

The invention discloses a circuit for turning on and off a sensor. The circuit comprises an TMR (triple modular redundancy) element (1), a resistor (2), a first current source (3) and a second current source (4), wherein the TMR element (1) is electrically connected with the first current source (3); the resistor (2) is electrically connected with the second current source (4); the TMR element (1) is electrically connected with the resistor (2); the first current source (3) is electrically connected with the second current source (4); the TMR element (1), the resistor (2), the first current source (3) and the second current source (4) are respectively used as a bridge arm and electrically connected to form an electric bridge; the temperature coefficient of the TMR element (1) is matched with that of the resistor (2); the first current source (3) and the second current source (4) are used for supplying constant current; the resistor (2) is used for supplying a resistance value matched with the TMR element (1); and the TMR element (1) is used for inducing changes of an external magnetic field. The circuit is low in power consumption, when the input voltage of the circuit is 3V, the power consumption of the circuit is less than or equal to 5mu W; and the power consumption of the circuit is not influenced by the resistance values of the TMR element and resistor.

Description

technical field [0001] The invention relates to the technical field of switch sensors, in particular to a circuit for switch sensors. Background technique [0002] Switching sensors are used in a wide range of industries. In the prior art, the power consumption of the switching sensor circuit is relatively high. When the input voltage of the switch sensor is 3V, even if a sleep circuit is added to the switch sensor, its power consumption still cannot reach below 3μW, and the added sleep circuit will reduce the response speed of the switch sensor circuit instead. [0003] Currently, there is a great need for a circuit for switching sensors that consumes less power and can maintain a certain response speed. Contents of the invention [0004] The object of the invention is to provide a circuit for switching sensors. [0005] The circuit for switching sensors provided by the present invention includes a TMR element, a resistor, a first current source and a second current so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/95
Inventor 钟小军
Owner WUXI LER TECH CO LTD