Patent ID: 6441804
Filing Date: 2002-08-27
Classification: G06F,H04L

Abstract:
A cursor control device comprising:an encoder for generating position information regarding the cursor pointing device; a button circuit for receiving user activated button signals; a controller coupled to the encoder and the button circuit for receiving the position information and button signals, respectively, and responsive thereto for generating a control signal; and a high frequency modulator coupled to the controller for receiving the control signal and generating an output signal to be transmitted to a receiver, said high frequency modulator including: a variable frequency modulator circuit having a switching transistor that is selectively turned on or off to select between one of only two predetermined frequency deviations of the control signal; and a high frequency circuit for increasing the frequency deviation of the control signal; wherein the variable frequency modulator circuit further includes a first capacitor and a second capacitor that are in parallel when the switching transistor is turned on.