Variable output ramping for an implantable medical device

1. An implantable medical device for providing an electrical neurostimulation therapy to a patient, the implantable medical device comprising:

a ramping signal controller configured to generate via a ramping signal generator a first electrical signal comprising a first ramping portion which is based on a first parameter including at least one of an amplitude, a rate of change of the amplitude, a time period of the rate of change of the amplitude, a pulse width, a rate of change of the pulse width, a time period of a rate of change of the pulse width, a frequency, a rate of change of the frequency, a time period of a rate of change of the frequency, and a duration of a time period of the first ramping portion, the first parameter having a first value;

the first electrical signal being applied to a target location of the patient's body;

the ramping signal controller being configured to determine via an efficacy feedback unit a second value for the first parameter for a second electrical signal based on a neural conditioning value, the second value being different than the first value and the second value having a randomized portion;

the ramping signal controller being further configured to generate via the ramping signal generator the second electrical signal comprising a second ramping portion based on the second value, wherein the second value is chosen by the ramping signal controller to reduce neural conditioning; and

wherein the second electrical signal is applied to the target location of the patient's body.

2. The implantable medical device of claim 1 , wherein the first electrical signal comprising the first ramping portion includes at least one of a ramping-up portion having the first parameter and a ramping-down having the first parameter.

3. The implantable medical device of claim 2 , wherein the ramping portion comprises at least one of the ramping-up portion having the second value and the ramping-down portion having the second value.

4. The implantable medical device of claim 1 , wherein the second electrical signal is based on the second value that differs randomly from the first value.

5. The implantable medical device of claim 1 , wherein the second electrical signal is utilized to provide a multi-phasic signal for the ramping portion.

6. The implantable medical device of claim 1 , wherein the second electrical signal is based on at least one of an external command, an internal programmed command, and a feedback indication.

7. The implantable medical device of claim 1 , wherein the second electrical signal is based on data relating to an efficacy associated with the stimulation.

8. A method for providing an electrical neurostimulation therapy to a patient using an implantable medical device (IMD), comprising:

generating a first electrical signal comprising a first ramping portion which is based on a first parameter including at least one of an amplitude, a time period of a rate of change of the amplitude, a pulse width, a rate of change of the pulse width, a time period of the rate of change of the pulse width, a frequency, a rate of change of the frequency, a time period of a rate of change of the frequency, and a duration of a time period of the first ramping portion, the first parameter having a first value;

applying the first electrical signal to a target location of the patient's body;

determining a second value for the first parameter for a second electrical signal based on a neural conditioning value, the second value being different than the first value and the second value having a randomized portion;

generating the second electrical signal comprising a second ramping portion based on the second value, wherein the second value differs randomly from the first value and is chosen by the IMD to reduce neural conditioning; and

applying the second electrical signal to the target location of the patient's body.