Abstract:
An implantable medical device can include an integrated circuit comprising an electrostatic discharge (ESD) protection circuit. The ESD protection circuit can include an active circuit, a first passive circuit, and a second passive circuit. For example, at least one of the first or second passive circuits can include an array of capacitors in a series configuration, a parallel configuration, or a combination of series and parallel configurations. The first and second passive circuits can be configured to establish a specified time constant, and, in response to an applied ESD, the first and second passive circuits can provide a control signal to active circuit to switch the active circuit from a substantially non-conductive mode to a substantially conductive mode.
Abstract:
An implantable medical device can include an integrated circuit comprising an electrostatic discharge (ESD) protection circuit. The ESD protection circuit can include an active circuit, a first passive circuit, and a second passive circuit. For example, at least one of the first or second passive circuits can include an array of capacitors in a series configuration, a parallel configuration, or a combination of series and parallel configurations. The first and second passive circuits can be configured to establish a specified time constant, and, in response to an applied ESD, the first and second passive circuits can provide a control signal to active circuit to switch the active circuit from a substantially non-conductive mode to a substantially conductive mode.
Abstract:
An apparatus comprises a cardiac signal sensing circuit configured to sense an electrical cardiac signal from at least one of an atrium or ventricle of a heart of a subject, a therapy circuit configured to provide electrical pacing therapy and electrical autonomic neural modulation therapy to the subject, and a control circuit. The control circuit is configured to initiate delivery of the autonomic modulation neural therapy, and the control circuit includes a signal detection circuit configured to detect delivery of the autonomic neural modulation therapy in the sensed cardiac signal. The control circuit is configured to change, in response to detecting the delivery, a sensitivity of the cardiac signal sensing circuit during delivery of the autonomic neural modulation therapy.
Abstract:
A medical device includes: a case at least a portion of which functions as a first electrode; a second electrode disposed in a header coupled to the case; a core assembly, the core assembly including operational circuitry enclosed within a core assembly housing, wherein the case includes the core assembly housing; and a battery assembly, the battery assembly including a battery enclosed within a battery housing, where the case further comprises the battery housing; where the operational circuitry is configured to drive a regulated voltage onto the case.
Abstract:
During auto-threshold, autocapture, or other evoked response sensing, post-pace artifact is reduced by using a smaller coupling capacitor value than what is used when not in such an evoked response sensing configuration. This can be accomplished by borrowing another capacitor for use as the coupling capacitor. The borrowed capacitor can be a backup pacing capacitor from the same or a different pacing channel. The borrowed capacitor can also be a coupling capacitor from a different pacing channel.
Abstract:
An integrated circuit for an implantable medical device can include a substrate, a first capacitor, and an electrostatic discharge (ESD) protection circuit. The first capacitor can include an electrically conductive lower polysilicon terminal and an electrically conductive upper polysilicon terminal that can be separated from the lower polysilicon terminal by a first capacitor dielectric material. The ESD protection circuit can include an ESD shunt transistor and a second capacitor. The ESD shunt transistor can be configured to be normally off, but can be configured to turn on and conduct between first and second power supply rails in response to an ESD event exceeding a specified ESD event threshold value. The second capacitor can includes a first substrate terminal and an electrically conductive second polysilicon terminal that can be separated from the first substrate terminal by a second capacitor dielectric material.
Abstract:
A medical device includes: a case at least a portion of which functions as a first electrode; a second electrode disposed in a header coupled to the case; a core assembly, the core assembly including operational circuitry enclosed within a core assembly housing, wherein the case includes the core assembly housing; and a battery assembly, the battery assembly including a battery enclosed within a battery housing, where the case further comprises the battery housing; where the operational circuitry is configured to drive a regulated voltage onto the case.
Abstract:
An ambulatory or implantable device, such as a pacer, defibrillator, or other cardiac rhythm management device, can tolerate magnetic resonance imaging (MRI) or other noise without turning on an integrated circuit diode by selectively providing a bias voltage that can overcome an expected induced voltage resulting from the MRI or other noise.
Abstract:
During auto-threshold, autocapture, or other evoked response sensing, post-pace artifact is reduced by using a smaller coupling capacitor value than what is used when not in such an evoked response sensing configuration. This can be accomplished by borrowing another capacitor for use as the coupling capacitor. The borrowed capacitor can be a backup pacing capacitor from the same or a different pacing channel. The borrowed capacitor can also be a coupling capacitor from a different pacing channel.
Abstract:
An integrated circuit for an implantable medical device can include a substrate, a first capacitor, and an electrostatic discharge (ESD) protection circuit. The first capacitor can include an electrically conductive lower polysilicon terminal and an electrically conductive upper polysilicon terminal that can be separated from the lower polysilicon terminal by a first capacitor dielectric material. The ESD protection circuit can include an ESD shunt transistor and a second capacitor. The ESD shunt transistor can be configured to be normally off, but can be configured to turn on and conduct between first and second power supply rails in response to an ESD event exceeding a specified ESD event threshold value. The second capacitor can includes a first substrate terminal and an electrically conductive second polysilicon terminal that can be separated from the first substrate terminal by a second capacitor dielectric material.