Integrated Circuit Implementation and Fault Control System, Device, and Method

A supply circuit in an implantable satellite integrated circuit, the circuit comprising:

• (a) a resistor divider network coupled to a first interface signal via a switch;
• (b) a transistor coupled to a first supply, and controllable by a node of the resistor divider network;
• and
• (c) a buffer configured to receive an output from the transistor, and to open the switch when the first interface signal is greater than a first predetermined level.

An apparatus comprising:

• (a) an in-body computing system;
• (b) a plurality of electrodes in electrical contact with a patient's body, the plurality of electrodes being selectively configurable for electrical connection with the in-body computing system;
• and
• (c) an external impedance stabilizer, the external impedance stabilizer having a configuration mode in which all of the plurality of electrodes are decoupled from the in-body computing system and an operating mode in which selected electrodes of the plurality of electrodes are coupled to the in-body computing system.

A lead for use with a pacing voltage source, the pacing voltage source comprising first and second terminals, the lead comprising:

• a satellite, the satellite comprising control electronics and an electrode, the control electronics having first and second terminals,
• the lead comprising a conductor along its length, the conductor comprising a first end and a second end, the first end of the conductor disposed for electrical contact with the pacing voltage source, the second end of the conductor connecting with the first terminal of the control electronics, the second terminal of the control electronics in electrical contact with the electrode;
• the control electronics responsive to a pulse from the pacing voltage source for maintaining a first impedance between the first and second terminals of the control electronics for an interval between one and fifty microseconds;
• the control electronics comprising a power extraction component disposed, while the first impedance is maintained, to accumulate a power supply within the control electronics;
• the control electronics further responsive to the passage of the interval for maintaining a second impedance between the first and second terminals of the control electronics, the second impedance being at least as small as one-tenth of the first impedance.