sensor
A sensor and main circuit technology, applied in the field of sensors, can solve problems such as sensor error output, and achieve the effect of preventing error output
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no. 1 approach ］
[0093] figure 1 is a block diagram showing a schematic configuration of the sensor of the first embodiment. refer to figure 1 , The sensor 101 of the first embodiment includes a main circuit 2 , an output circuit 3 , a resistor R1 , a capacitor C1 , a power supply terminal T1 , a ground terminal T2 , and an output terminal T3 . The output circuit 3 includes a current variable load 12 , a current source 13 , and a switch circuit 14 .
[0094] The power supply terminal T1 and the ground terminal T2 are respectively connected to the positive pole and the negative pole of the power supply 5 . The voltage V1 is thereby applied between the power supply terminal T1 and the ground terminal T2.
[0095] For example, in the case of NPN, one end of the resistor R1 is connected to the power supply terminal T1. The other end of the resistor R1 is connected to the main circuit 2 . The capacitor C1 is connected between the other end of the resistor R1 and the ground terminal T2. Resi...
no. 2 approach ］
[0132] Figure 9 It is a block diagram showing the schematic structure of the sensor of 2nd Embodiment. refer to figure 1 and Figure 9 , The sensor 102 of the second embodiment is different from the sensor 101 of the first embodiment in the configuration of the switch circuit 14 and the current source 13 . Specifically, in the second embodiment, the switch circuit 14 is configured to connect any one of the current source 13 and the current fluctuating load 12 to the ground terminal T2. In addition, the switch circuit 14 is not connected to any of the current source 13 and the current fluctuating load 12 until the voltage V2 reaches the threshold voltage VTH3. This point is the same as the first embodiment.
[0133] Figure 10 is description Figure 9 A diagram of a specific configuration example of the circuit shown. refer to figure 2 and Figure 10 The sensor 102 differs from the sensor 101 in that the output circuit 3 further includes a current source 17 , and th...
no. 3 approach ］
[0139] Figure 11 It is a block diagram showing the schematic structure of the sensor of 3rd Embodiment. refer to figure 1 and Figure 11 , the sensor 103 of the third embodiment is configured such that the current I flowing through the main circuit 2 0 A part of the current is shunted and flows through the structure of the current varying load 12 . Specifically, the current source 13 is connected to the main circuit 2 . Under the control of the main circuit 2 , the switch circuit 14 switches whether the current from the current source 13 flows to the ground terminal T2 or to the current variable load 12 .
[0140] When the switch circuit 14 is connected to the current source 13 and the ground terminal T2, the current I 2 The current flows from the current source 13 to the ground terminal T2 without flowing through the current varying load 12 . This state corresponds to the "second state" described above.
[0141] On the other hand, when the switch circuit 14 is connec...
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