Examples of an electronic device are described. In some examples, the electronic device includes a first shared line of a plurality of first contacts to respectively connect to a plurality of integrated circuits, a plurality of second lines of respective second contacts to respectively connect to the plurality of integrated circuits, and a third shared line of a plurality of third contacts to respectively connect to the plurality of integrated circuits. In some examples, the electronic device includes circuitry to determine whether one of the third contacts is connected to an integrated circuit based on a state of the first shared line and a state of one of the second lines that is associated with the one of the third contacts.

Disclosed herein is an RF ablation system including a plurality of electrodes, a ground pad, and a signal generator. The electrodes are positioned at respective tissue sites within a patient's body, and the ground pad is positioned on the patient's body. The signal generator is coupled to the ground pad and the electrodes via corresponding channels including a selected channel and unselected channels. The signal generator commutates switching circuits for the corresponding channels to close the selected channel and to open the unselected channels, and measures a first impedance over the selected channel. The signal generator commutates the switching circuits to close the selected channel and the unselected channels, and then measures a second impedance. The signal generator computes a difference between the first and second impedances, and determines the ground pad has at least a poor electrical connection to the patient's body when the difference exceeds a threshold.

Disclosed herein is an RF ablation system including a plurality of electrodes, a ground pad, and a signal generator. The electrodes are positioned at respective tissue sites within a patient's body, and the ground pad is positioned on the patient's body. The signal generator is coupled to the ground pad and the electrodes via corresponding channels including a selected channel and unselected channels. The signal generator commutates switching circuits for the corresponding channels to close the selected channel and to open the unselected channels, and measures a first impedance over the selected channel. The signal generator commutates the switching circuits to close the selected channel and the unselected channels, and then measures a second impedance. The signal generator computes a difference between the first and second impedances, and determines the ground pad has at least a poor electrical connection to the patient's body when the difference exceeds a threshold.

An interlock diagnosing system and method for a high voltage device include: a detection circuit extending between a transmitter providing a voltage and a receiver receiving the voltage provided by the transmitter; a plurality of resistors, each being connected in parallel to the detection circuit via a respective one of a plurality of connectors engaged between the plurality of resistors and the detection circuit; and a detector detecting engaged states of the plurality of connectors based on the voltage provided by the transmitter or the voltage received by the receiver.

An interlock diagnosing system and method for a high voltage device include: a detection circuit extending between a transmitter providing a voltage and a receiver receiving the voltage provided by the transmitter; a plurality of resistors, each being connected in parallel to the detection circuit via a respective one of a plurality of connectors engaged between the plurality of resistors and the detection circuit; and a detector detecting engaged states of the plurality of connectors based on the voltage provided by the transmitter or the voltage received by the receiver.

A probe fitting structure includes a connector to be inspected and a probe capable of being fitted to the connector. The connector includes a plurality of connection electrodes. The probe includes a flange having a through hole and used for attaching the probe to a device, a coaxial cable extending through the through hole and including a leading end portion to which a probe pin is attached, a plunger including a leading end through which the probe pin is exposed, and a spring housing the coaxial cable between the flange and the plunger and including a first end portion fixed to the flange and a second end portion fixed to the plunger. The plunger includes a plunger-side fitting portion in a leading end portion of the plunger. The connector includes a connector-side fitting portion (opening portion) capable of being fitted to the plunger-side fitting portion.

A probe includes a tubular body having conductivity and a tubular shape, and a first central conductor having conductivity and a stick shape. The tubular body has a cross section perpendicular to an axial direction, the cross section having a shape that is rectangular or hexagonal, and the first central conductor includes a first insertion portion having a cross section perpendicular to an axial direction of the first central conductor, the cross section having a shape that is same as the shape of the cross section of the tubular body, the first insertion portion being inserted into one end portion side of the tubular body, and a first projecting portion projecting from one end portion of the tubular body.

A probe includes a tubular body having conductivity and a tubular shape, and a first central conductor having conductivity and a stick shape. The tubular body has a cross section perpendicular to an axial direction, the cross section having a shape that is rectangular or hexagonal, and the first central conductor includes a first insertion portion having a cross section perpendicular to an axial direction of the first central conductor, the cross section having a shape that is same as the shape of the cross section of the tubular body, the first insertion portion being inserted into one end portion side of the tubular body, and a first projecting portion projecting from one end portion of the tubular body.

A connection detector includes: a power supply line for use in supply of a power supply potential; a CC terminal; a ground terminal; an electric-current output circuit arranged between the power supply line and the CC terminal and including a first switch for use in disabling an electric-current output; a pulldown resistor circuit arranged between the CC terminal and the ground terminal and including a second switch for use in disabling a pulldown resistance; a bias circuit configured to generate a first reference potential and a second reference potential that is different from the first reference potential; and a role detector including a first comparator configured to compare the first reference potential with a voltage of the CC terminal and a second comparator configured to compare the second reference potential with a voltage of the CC terminal.

A connection detector includes: a power supply line for use in supply of a power supply potential; a CC terminal; a ground terminal; an electric-current output circuit arranged between the power supply line and the CC terminal and including a first switch for use in disabling an electric-current output; a pulldown resistor circuit arranged between the CC terminal and the ground terminal and including a second switch for use in disabling a pulldown resistance; a bias circuit configured to generate a first reference potential and a second reference potential that is different from the first reference potential; and a role detector including a first comparator configured to compare the first reference potential with a voltage of the CC terminal and a second comparator configured to compare the second reference potential with a voltage of the CC terminal.