Semiconductor sensing device
AssigneeFuji Electric Co., Ltd.
InventorsKazuhiro MATSUNAMI, Mutsuo NISHIKAWA
Life of this patent
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Abstract
A semiconductor sensing device generates an output based on a sensor. A connection point of an output circuit constituted by first and second switching output elements connected so as to be complementary is connected to an output terminal. Between the first switching output element and the connection point of the output circuit, a first switching element is connected. Between the second switching output element and the connection point of the output circuit, a second switching element is connected. When voltage of the output terminal is a voltage lower than a lower limit clamp voltage, the first switching element turns OFF. When the voltage of the output terminal is a voltage higher than an upper limit clamp voltage, the second switching element turns OFF.
Claims10
A semiconductor sensing device configured to output an electronic signal of a voltage corresponding to a magnitude of a detected physical quantity or force, the semiconductor sensing device comprising:
- a first switching output element having one terminal connected to a low-potential and another terminal having a higher potential than the one terminal;
- a second switching output element connected on a high-potential side of the first switching output element, the first and second switching output elements being complementary, so as to perform switching operations based on receiving opposing input potential voltages;
- a first switching element connected to the high potential side of the first switching output element, between the first switching output element and the second switching output element;
- a second switching element connected between the first switching element and the second switching output element;
- an output terminal connected to a connection point of the first switching element and the second switching element, the output terminal outputting to an external device the electronic signal having a potential of the connection point;
- and
- an output adjustment circuit electrically connected to control inputs of the first and second switching elements,
- wherein the output adjustment circuit is configured to turn off the first switching element when a voltage of the output terminal is less than a first voltage,
- the output adjustment circuit is configured to turn off the second switching element when the voltage of the output terminal is a second voltage or higher, the second voltage being higher than the first voltage,
- the output adjustment circuit is configured to turn off the second switching element when the voltage of the output terminal is a third voltage lower than the first voltage, and
- the output adjustment circuit is configured to turn off the first switching element when the voltage of the output terminal is a fourth voltage higher than the second voltage.
Dependencies are inferred from the claim text.