BIOMEDICAL SIGNAL SENSING CIRCUIT
First Claim
1. A biomedical signal sensing circuit, comprising:
- a first modulation unit, receiving a first biomedical signal, and performing a first modulation operation to the first biomedical signal according to a first signal to generate a first modulation signal;
a second modulation unit, receiving a second biomedical signal, and performing a second modulation operation to the second biomedical signal according to a second signal to generate a second modulation signal, wherein the second signal is orthogonal to the first signal;
an amplifying unit, coupled to the first modulation unit and the second modulation unit, amplifying the first modulation signal and the second modulation signal, and adding the amplified first modulation signal and second modulation signal to generate a third modulation signal;
a first demodulation unit, coupled to the amplifying unit, and performing a first demodulation operation to the third modulation signal according to the first signal to generate a first sensing signal; and
a second demodulation unit, coupled to the amplifying unit, and performing a second demodulation operation to the third modulation signal according to the second signal to generate a second sensing signal.
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Abstract
A biomedical signal sensing circuit including a first and a second modulation unit, an amplifying unit, a first and a second demodulation unit is provided. The first modulation unit performs a first modulation operation to a first biomedical signal according to a first signal to generate a first modulation signal. The second modulation unit performs a second modulation operation to a second biomedical signal according to a second signal to generate a second modulation signal. The amplifying unit amplifies the first and second modulation signals, and adds the amplified first and second modulation signals to generate a third modulation signal. The first demodulation unit performs a first demodulation operation to the third modulation signal according to the first signal to generate a first sensing signal. The second demodulation unit performs a second demodulation operation to the third modulation signal according to the second signal to generate a second sensing signal.
2 Citations
11 Claims
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1. A biomedical signal sensing circuit, comprising:
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a first modulation unit, receiving a first biomedical signal, and performing a first modulation operation to the first biomedical signal according to a first signal to generate a first modulation signal; a second modulation unit, receiving a second biomedical signal, and performing a second modulation operation to the second biomedical signal according to a second signal to generate a second modulation signal, wherein the second signal is orthogonal to the first signal; an amplifying unit, coupled to the first modulation unit and the second modulation unit, amplifying the first modulation signal and the second modulation signal, and adding the amplified first modulation signal and second modulation signal to generate a third modulation signal; a first demodulation unit, coupled to the amplifying unit, and performing a first demodulation operation to the third modulation signal according to the first signal to generate a first sensing signal; and a second demodulation unit, coupled to the amplifying unit, and performing a second demodulation operation to the third modulation signal according to the second signal to generate a second sensing signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification