An input circuitry for receiving electrode signals comprises: a plurality of channels for providing a multiplexed electrode signal input, each channel comprising a multiplexing switch for selecting one channel at a time, and an input transistor configured to be connected to an electrode, wherein the input transistor is configured to receive an electrode signal at a gate; and a reference input transistor, which is configured to be connected to a reference voltage at a gate; wherein an electrode signal received at a selected channel together with the reference voltage form input signals to an instrumentation amplifier; wherein the input circuitry is configured such that the input transistor of the selected channel forms part of a first flipped voltage follower and the reference input transistor forms part of a second flipped voltage follower.

An input circuitry for receiving electrode signals comprises: a plurality of channels for providing a multiplexed electrode signal input, each channel comprising a multiplexing switch for selecting one channel at a time, and an input transistor configured to be connected to an electrode, wherein the input transistor is configured to receive an electrode signal at a gate; and a reference input transistor, which is configured to be connected to a reference voltage at a gate; wherein an electrode signal received at a selected channel together with the reference voltage form input signals to an instrumentation amplifier; wherein the input circuitry is configured such that the input transistor of the selected channel forms part of a first flipped voltage follower and the reference input transistor forms part of a second flipped voltage follower.

Methods and systems for combining ablation therapy with navigation of the ablation device. An ablation system may be configured for use with one of two methods to prevent loss of navigation signals during ablation energy delivery. In the first method, ablation energy signals are filtered from the navigation signal. In the second method, the delivery of ablation energy is sequenced with the delivery of navigation energy such that ablation energy and navigation energy are not delivered at the same time and navigation signals received by the system are time-division multiplexed to reconstruct the navigation signals and determine a location of the device within the patient.

Methods and systems for combining ablation therapy with navigation of the ablation device. An ablation system may be configured for use with one of two methods to prevent loss of navigation signals during ablation energy delivery. In the first method, ablation energy signals are filtered from the navigation signal. In the second method, the delivery of ablation energy is sequenced with the delivery of navigation energy such that ablation energy and navigation energy are not delivered at the same time and navigation signals received by the system are time-division multiplexed to reconstruct the navigation signals and determine a location of the device within the patient.

Provided is a biological information acquisition system capable of acquiring an electric parameter and biological information that are more accurate. A biological information acquisition system 200 includes a flexible electrode sheet 100 having multiple electrodes 30 arranged in an array, an electrode selector that acquires an electric parameter from the multiple electrodes 30 in a state in which the electrode sheet 100 is arranged along a biological body 300 such that the multiple electrodes 30 do not contact the biological body 300 to select the electrodes 30 to be used for acquisition of biological information based on the acquired electric parameter, and a biological information acquirer that acquires the biological information from the electrodes 30 selected by the electrode selector in a state in which the electrode sheet 100 is arranged along the biological body 300 such that the multiple electrodes 30 do not contact the biological body 300.

According to an embodiment, a biopotential measurement system includes an analog front-end and digital circuits. The analog front-end circuit includes a sensing electrode, a forward amplifier, and a feedback amplifier with an integration capacitor. A feature is the attenuation circuit between the forward and feedback amplifiers, which provides an attenuation factor determining the integration capacitor's value for achieving the desired high-pass corner frequency. With configurable attenuation factors, the system can process different biopotential signals. Multiple analog front-end circuits can be used to process different signals simultaneously. The digital circuit includes a processor for signal processing, dynamic adjustment of attenuation factors, and anomaly detection. Additional components like switched capacitors, pseudo-resistors, and multiplexers can enhance the system's functionality. The design allows flexible, multi-parameter physiological monitoring with adjustable frequency responses and gain settings.

According to an embodiment, a biopotential measurement system includes an analog front-end and digital circuits. The analog front-end circuit includes a sensing electrode, a forward amplifier, and a feedback amplifier with an integration capacitor. A feature is the attenuation circuit between the forward and feedback amplifiers, which provides an attenuation factor determining the integration capacitor's value for achieving the desired high-pass corner frequency. With configurable attenuation factors, the system can process different biopotential signals. Multiple analog front-end circuits can be used to process different signals simultaneously. The digital circuit includes a processor for signal processing, dynamic adjustment of attenuation factors, and anomaly detection. Additional components like switched capacitors, pseudo-resistors, and multiplexers can enhance the system's functionality. The design allows flexible, multi-parameter physiological monitoring with adjustable frequency responses and gain settings.

Disclosed herein is a multi-electrode catheter system including an amplifier stage and an amplifier interface. The amplifier stage includes at least a first quantity of amplifier channels. The amplifier interface includes a first interface having at least the first quantity of interface channels. The amplifier channels are respectively electrically coupled to the interface channels. The amplifier interface includes a second interface having a second quantity of catheter channels, the second quantity being greater than the first quantity. The catheter channels are configured to be respectively electrically coupled to corresponding electrode leads of a multi-electrode catheter. The amplifier interface includes a switching matrix electrically coupled between the first interface and the second interface. The switching matrix is configured to selectively electrically couple a selected subset of catheter channels to respective interface channels of the first quantity of interface channels.

Disclosed herein is a multi-electrode catheter system including an amplifier stage and an amplifier interface. The amplifier stage includes at least a first quantity of amplifier channels. The amplifier interface includes a first interface having at least the first quantity of interface channels. The amplifier channels are respectively electrically coupled to the interface channels. The amplifier interface includes a second interface having a second quantity of catheter channels, the second quantity being greater than the first quantity. The catheter channels are configured to be respectively electrically coupled to corresponding electrode leads of a multi-electrode catheter. The amplifier interface includes a switching matrix electrically coupled between the first interface and the second interface. The switching matrix is configured to selectively electrically couple a selected subset of catheter channels to respective interface channels of the first quantity of interface channels.

A connector may include a first housing configured to detachably secure a first input cable of a first sensor configured to generate a first signal, and a second housing configured to detachably secure a second input cable of a second sensor configured to generate a second signal. The second housing may be configured to transmit the second signal from the second input cable to the first housing. The first housing may be configured to transmit at least one of the first signal and the second signal to an output cable. A coupling of the first housing may be configured to mate with a coupling of the second housing such that the first housing and the second housing are configured to be detachably secured to each other. The coupling may be mechanical, electro-mechanical, or magnetic. Either sensor may be an electrocardiogram sensor or a pulse oximetry sensor.