1results about "Network simulating negative resistances" patented technology

To provide a signal collection circuit that reduce influence of parasitic capacitance on signal collection and a wearable device.SOLUTION: A signal collection circuit 200 includes a difference amplifier 230, a first electrode 210, a second electrode 220, a first negative capacitance circuit C10, and a second negative capacitance circuit C20. The first electrode is connected to a first input end of a difference amplifier via a first lead wire L1, and the second electrode is connected to a second input end of the difference amplifier via a second lead wire L2. The first negative capacitance circuit is electrically connected to the first lead wire and a ground line, the second negative capacitance circuit is electrically connected to the second lead wire and the ground line, and both circuits have a negative capacitance effect. The signal collection circuit may further include a third negative capacitance circuit C30. The third negative capacitance circuit is electrically connected between the first lead wire and the second lead wire and being connected in parallel to inter-lead parasitic capacitance C3.SELECTED DRAWING: Figure 3