6results about "Network simulating negative resistances" patented technology

A tank circuit (200) includes a tunable resonator subcircuit (210) having a first control input and having an effective parallel resistance that varies with tuning of the tunable resonator subcircuit (210). The tank circuit (200) further comprises a variable negative-resistance subcircuit (250) having a second control input and coupled in parallel to the tunable resonator subcircuit (210), where the variable negative-resistance subcircuit (250) is configured to provide a variable negative resistance, responsive to the control input, so as to increase the effective parallel resistance of the tank circuit (200).

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

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

An embodiment of the present application discloses a signal acquisition circuit. The signal acquisition circuit includes a differential amplifier, a first electrode, a second electrode, a first negative capacitance circuit, and a second negative capacitance circuit. The first electrode is connected to a first input terminal of the differential amplifier via a first lead wire, and the second electrode is connected to a second input terminal of the differential amplifier via a second lead wire. The first negative capacitance circuit is electrically connected to the first lead wire and a ground wire, and the second negative capacitance circuit is electrically connected to the second lead wire and a ground wire, and both the first negative capacitance circuit and the second negative capacitance circuit have a negative capacitance effect.

Embodiments of the present disclosure provide a signal acquisition circuit. The signal acquisition circuit includes a differential amplifier, a first electrode, a second electrode, a first negative capacitance circuit, and a second negative capacitance circuit. The first electrode is connected to a first input terminal of the differential amplifier through a first lead, and the second electrode is connected to a second input terminal of the differential amplifier through a second lead. The first negative capacitance circuit is electrically connected to the first lead and ground, and the second negative capacitance circuit is electrically connected to the second lead and the ground. Both the first negative capacitance circuit and the second negative capacitance circuit exhibit a negative capacitance effect.