Touchpad Cable Function
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08
This article describes a touchpad cable function which uses only one cable for either remote or cable modes. The cable carries both power and signal for either a touchpad or receiver. Existing touchpads do not allow for the infrared (IR) receiver to receive its power through the cable when it is in the touchpad-to- system communication path. Thus, different cables are needed for the touchpad and receiver units. The arrangement disclosed herein allows connection of either the touchpad or receiver unit to a personal computer (PC) system. This permits users to position their system or receiver units arbitrarily relative to the touchpad. The drawing illustrates the present touchpad cable function in both the IR and cable modes.