Pen for use with a touch screen

A pen for interacting with a touch screen, the pen comprises:

• an alternating current (AC) coupling circuit comprising:
• a first AC coupling circuit operable to receive a sense signal from the touch screen, wherein the first AC coupling circuit is physically located at a first location of the pen;
• and
• a second AC coupling circuit operable to transmit a transmit signal to the touch screen, wherein the second AC coupling circuit is physically located at a second location of the pen, wherein the touch screen is capable of discerning between the first and second locations, and wherein the touch screen is capable of interpreting the transmit signal as an input to the touch screen;
• and
• a sense-regulation circuit operable to:
• receive the sense signal from the AC coupling circuit;
• receive a representation of transmit data;
• and
• convert the representation of the transmit data into the transmit signal.