Adaptive drive system

1. An touch panel apparatus comprising:

a down pump configured to generate a regulated voltage signal based, at least in part, on an input voltage and a reference voltage;

a level shifter configured to generate an activation signal having a voltage level corresponding to the reference voltage based, at least in part, on the input voltage and the regulated voltage signal; and

a switching device configured to generate a drive signal corresponding to the input voltage in response to the activation signal.

2. The touch panel apparatus of claim 1 , wherein the regulated voltage signal has a voltage level corresponding to a difference between the input voltage and the reference voltage.

3. The touch panel apparatus of claim 1 , wherein the down pump and the level shifter are formed in a triple-well to electrically isolate the down pump and the level shifter from other circuitry in the touch panel apparatus, wherein the down pump is configured to generate the regulated voltage signal having a negative voltage level.

4. The touch panel apparatus of claim 1 , wherein the level shifter further comprising flip circuitry including multiple inverters arranged in a closed loop configuration, wherein the flip circuitry is configured to generate the activation signal in response to a control signal.

5. The touch panel apparatus of claim 4 , further comprising a decoupling capacitor coupled between the input voltage and the regulated voltage signal, and configured to reduce fluctuation in the input voltage introduced by the flip circuitry during the generation of the activation signal.

6. The touch panel apparatus of claim 4 , wherein the level shifter further comprising a buffer coupled to the flip circuitry and configured to provide the activation signal to the switching device in response to the control signal.

7. The touch panel apparatus of claim 1 , wherein the switching device includes a p-type field effect transistor (PFET) device configured to generate the drive signal at a drain region from the input voltage at a source region and the activation signal at a gate region.

8. A method of driving a touch panel comprising:

generating, with a drive system, a regulated voltage signal based, at least in part, on an input voltage and a reference voltage;

generating, with the drive system, an activation signal having a voltage level corresponding to the reference voltage based, at least in part, on the input voltage and the regulated voltage signal; and

generating, with the drive system, a drive signal corresponding to the input voltage in response to the activation signal.

9. The method of driving a touch panel of claim 8 , wherein the regulated voltage signal has a voltage level corresponding to a difference between the input voltage and the reference voltage.

10. The method of driving a touch panel of claim 8 , further comprising providing the drive signal to a touch screen display.

11. The method of driving a touch panel of claim 10 , further comprising receiving touch signaling from the touch screen display in response to providing the drive signal to the touch screen display.

12. The method of driving a touch panel of claim 11 , further comprising forwarding the touch signaling to a touch detection device configured to identify whether an object is proximate to the touch screen display based on the touch signaling.

13. The method of driving a touch panel of claim 8 , wherein the drive system is formed in an oxide-trench isolated-well to electrically isolate the drive system from other circuitry in a common die, wherein the drive system is configured to generate the regulated voltage signal having a negative voltage level.

14. The method of driving a touch panel of claim 8 , wherein the drive system includes a p-type field effect transistor (PFET) device configured to generate the drive signal at a drain region from the input voltage at a source region and the activation signal at a gate region.

15. An touch panel apparatus comprising:

a charge pump device configured to boost a voltage level of an input signal; a drive system configured to generate an activation signal based on the boosted input signal,

wherein the drive system includes a switching device configured to generate a drive signal corresponding to the boosted input signal in response to the activation signal; and

a touch screen display configured to sense an object is proximate to a panel of the touch screen display in response to the drive signal.

16. The touch panel apparatus of claim 15 , further comprising a down pump configured to generate a regulated voltage signal based, at least in part, on the boosted input signal and a reference voltage, wherein the drive system is configured to generate the activation signal based, at least in part, on the boosted input signal and the regulated voltage signal.

17. The touch panel apparatus of claim 16 , wherein the activation signal has a voltage level corresponding to the reference voltage.

18. The touch panel apparatus of claim 16 , wherein the drive system further comprising:

a first level shifter configured to generate a first activation signal based, at least in part, on the boosted input signal and the regulated voltage signal; and

a first switching device configured to generate a first drive signal corresponding to the boosted input signal in response to the first activation signal.

19. The touch panel apparatus of claim 18 , wherein the drive system further comprising:

a second level shifter configured to generate a second activation signal based, at least in part, on the boosted input signal and the regulated voltage signal; and

a second switching device configured to generate a second drive signal corresponding to the boosted input signal in response to the second activation signal.

20. The touch panel apparatus of claim 16 , wherein the drive system is configured to include the down pump.