Digitally adjustable phrenic nerve stimulator system

A system for electrical ventilation stimulation of a patient, comprising:

• an implantable nerve stimulator including:
• a battery,
• a wireless power receiver electrically coupled to the battery,
• a central processing unit,
• a plurality of hardware peripherals including a first timer, a second timer, a third timer, a digital-to-analog converter, and a direct memory access controller;
• a near field communication memory tag including an adjustable setting, and
• a stimulation circuit electrically coupled to the battery, wherein an output of the stimulation circuit is controlled based on the adjustable setting by the central processing unit and the plurality of hardware peripherals;
• wherein the output of the stimulation circuit is biphasic charge-balanced pulses to stimulate a phrenic nerve, wherein the biphasic charge-balanced pulses comprise a negative stimulation pulse and a positive recharge pulse separated by an inter-pulse resting period (IPR), and wherein a pulse magnitude of the positive recharge pulse is smaller than that of the negative stimulation pulse by a stimulation-to-recharge scaling (SRS) ratio, and a pulse length of the positive recharge pulse is longer than that of the negative stimulation pulse by the SRS ratio;
• and
• an external digital programming device having near field communication transmission and a digital interface;
• wherein the external digital programming device is configured to change the adjustable setting of the implantable nerve stimulator.