Semiconductor device, biological signal sensor and biological signal sensor system
AssigneeRenesas Electronics Corporation
InventorYasuhiro SHIRAI
Life of this patent
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Abstract
A semiconductor device includes a first terminal receiving a first signal, a second terminal receiving a second signal, a noise extraction analysis unit extracting a signal of a specific frequency component from the first and the second signal, a feedback unit generating a feedback signal based on a magnitude of the signal of the specific frequency component to cancel the signal of the specific frequency component superimposed on the first and the second signal, and third terminal outputting to the feedback signal to outside.
Claims13
A semiconductor device, comprising:
- a first terminal receiving a first signal;
- a second terminal receiving a second signal;
- a noise extraction analysis unit coupled to the first and the second terminal to extract a signal of a specific frequency component from the first and the second signal;
- a feedback unit configured to generate a feedback signal based on a magnitude of the signal of the specific frequency component to cancel the signal of the specific frequency component superimposed on the first and the second signal, and
- a third terminal outputting the feedback signal to outside.
The semiconductor device, comprising:
- a first terminal receiving a first biological signal;
- a second terminal receiving a second biological signal;
- a third terminal outputting a feedback signal;
- a noise extraction analysis unit coupled to the first and the second terminal to extract a signal of a specific frequency component from an intermediate potential signal of the first and the second biological signal;
- and
- a variable gain inverting amplifier receiving the intermediate potential signal,
- wherein an amplification factor is set based on a magnitude of the signal of the specific frequency component.
A biological signal sensor comprising:
- a first terminal receiving a first biological signal detected by a first signal detection electrode attached to a human body;
- a second terminal receiving a second biological signal detected by a second signal detection electrode attached to the human body;
- a differential amplifier differentially amplifying the first biological signal and the second biological signal;
- a noise extraction analysis unit configured to extract a signal having a specific frequency component from an intermediate potential signal of the first and the second biological signal;
- a feedback unit configured to generate a feedback signal based on a magnitude of the signal of the specific frequency component to cancel the signal of the specific frequency component superimposed on the first and the second biological signal;
- and
- a third terminal coupled to a feedback electrode attached to the human body to output the feedback signal to the feedback electrode.
Dependencies are inferred from the claim text.