Abstract: A high frequency injection system overlays a textured signal onto a digital control signal for controlling a motion base. The system includes a digital motion controller and HFIS generator linked to a mixer. A mixed signal from the mixer is amplified and provided to a valve for controlling an actuator for moving a motion base.

Abstract: A talking and animated doll, toy animal or the like in which speech sounds have simulated muscle movement of eyes, jaws, etc. synchronized thereto. Sound and multiplexed motion control signals are recorded on separate recording medium channels. Sound signals are conventionally detected, amplified and applied to a speaker within the doll. The motion representing signals are digitized and applied to a microprocessor to de-multiplex and provide a plurality of motion signals corresponding to a separate desired motion. These motion signals are each applied to a corresponding servomechanism through a digital-to-analog converter. The servomechanisms each comprise a motor and a driven lead screw having a spiral groove, a carriage having a groove follow, and a thrust rod attached to the carriage to provide an output motion. A linear potentiometer responsive to the position of the carriage provides a servo feedback signal.