Grounding circuit for alternate audio plug designs

An integrated circuit comprising:

• a coder-decoder circuit;
• a control circuit coupled to the coder-decoder circuit;
• a first floating-gate enhancement-mode transistor having a first source/drain region coupled to a first pad and a second source drain/region coupled to a ground pad;
• a second floating-gate enhancement-mode transistor having a first source/drain region coupled to a second pad and a second source drain/region coupled to a ground pad;
• and
• a charge pump having an input coupled to the control circuit and an output coupled to a gate terminal of the first floating-gate enhancement-mode transistor and a gate terminal of the second floating-gate enhancement-mode transistor.

A method of selectively grounding a contact in an audio jack comprising:

• receiving a first voltage at a first power supply terminal;
• providing a second voltage to a gate of a first floating-gate enhancement-mode transistor and a gate of a second floating-gate enhancement-mode transistor such that the first floating-gate enhancement-mode transistor and the second floating-gate enhancement-mode transistor are off;
• receiving a ground level voltage at the first power supply terminal;
• and
• providing a ground level voltage to a gate of a first floating-gate enhancement-mode transistor and a gate of a second floating-gate enhancement-mode transistor such that the first floating-gate enhancement-mode transistor and the second floating-gate enhancement-mode transistor are on and a first contact and a second contact in an audio jack are grounded.