Abstract: A switch mode power supply (voltage converter) is adapted as a current-mode control buck regulator for different loading conditions. The voltage converter operates in a continuous conduction mode (CCM) during heavy load conditions using pulse width modulation (PWM). When a zero-current detector determines no inductor current during light load conditions (discontinuous conduction mode (DCM) region), the controller initiates adaptive duty control using pulse frequency modulation (PFM). Adaptive duty estimation circuitry provides controllable energy to charge the power inductor to maintain voltage accuracy and maximize efficiency when in the PFM mode. Using clock synchronization and a single control-loop, smooth transition between PFM, PWM, and bypass modes is automatically performed. Clock synchronization from a master oscillator provides a base for frequency division in different operation modes which gives controllable evenly distributed switching harmonics.

Abstract: A remotely controlled toy vehicle includes a front assembly, a rear assembly, a drive mechanism, and a roll mechanism. The front assembly and the rear assembly each include at least one wheel and the drive mechanism includes a drive motor configured to drive at least one of the at least one wheel of the front assembly and the at least one wheel of the rear assembly. The roll mechanism includes a roll motor configured to roll one of the front assembly and the rear assembly with respect to the other of the front assembly and the rear assembly.

Abstract: A switch mode power supply (voltage converter) is adapted as a current-mode control buck regulator for different loading conditions. The voltage converter operates in a continuous conduction mode (CCM) during heavy load conditions using pulse width modulation (PWM). When a zero-current detector determines no inductor current during light load conditions (discontinuous conduction mode (DCM) region), the controller initiates adaptive duty control using pulse frequency modulation (PFM). Adaptive duty estimation circuitry provides controllable energy to charge the power inductor to maintain voltage accuracy and maximize efficiency when in the PFM mode. Using clock synchronization and a single control-loop, smooth transition between PFM, PWM, and bypass modes is automatically performed. Clock synchronization from a master oscillator provides a base for frequency division in different operation modes which gives controllable evenly distributed switching harmonics.

Abstract: A remotely controlled toy vehicle includes a front assembly, a rear assembly, a drive mechanism, and a roll mechanism. The front assembly and the rear assembly each include at least one wheel and the drive mechanism includes a drive motor configured to drive at least one of the at least one wheel of the front assembly and the at least one wheel of the rear assembly. The roll mechanism includes a roll motor configured to roll one of the front assembly and the rear assembly with respect to the other of the front assembly and the rear assembly.

Abstract: An animated children's toy including a gear system for providing intermittent and reciprocal motion. The gear system includes a drive gear and a driven gear. The gear system is adapted to have a non-rotating configuration and an engaged configuration. In the non-rotating configuration the driven gear is prevented from rotating, and a corresponding portion of the animated children's toy is not moving. In the engaged configuration the driven gear rotates and a corresponding portion of the animated children's toy moves.

Abstract: A toy animal having a rigid body with movable legs, head and tail, is operated by internal gear mechanisms powered by a single, reversible, battery-powered motor operated in different directions. A hand controller is attached to the body to actuate the single motor in a selected direction to either move a plurality of legs to cause movement of the body while wagging the animal's tail, and to then cause the toy animal to urinate, or to move the head and actuate a tongue held in the head to lick a person holding the toy animal, or ingest fluid. The toy animal may also include a speaker and related circuitry that is actuated to cause the toy animal to make sounds, such as a bark, panting, a whimper and/or a tinkling sound at appropriate times.

Abstract: A toy animal having a rigid body with movable legs, head and tail, is operated by internal gear mechanisms powered by a single, reversible, battery-powered motor operated in different directions. A hand controller is attached to the body to actuate the single motor in a selected direction to either move a plurality of legs to cause movement of the body while wagging the animal's tail, and to then cause the toy animal to urinate, or to move the head and actuate a tongue held in the head to lick a person holding the toy animal, or ingest fluid. The toy animal may also include a speaker and related circuitry that is actuated to cause the toy animal to make sounds, such as a bark, panting, a whimper and/or a tinkling sound at appropriate times.

Abstract: A sensor switch assembly intended for use inside a simulated mouth of a doll. The assembly include a fixed structure having a guide channel and a micro-switch attached near the guide channel, a movable structure having a floating pivot that may pivot within and slide along the guide channel so that the micro-switch may be triggered by any combination of sliding or pivoting of the movable structure.

Abstract: An animated children's toy including a gear system for providing intermittent and reciprocal motion. The gear system includes a drive gear and a driven gear. The gear system is adapted to have a non-rotating configuration and an engaged configuration. In the non-rotating configuration the driven gear is prevented from rotating, and a corresponding portion of the animated children's toy is not moving. In the engaged configuration the driven gear rotates and a corresponding portion of the animated children's toy moves.

Abstract: An animated children's toy including a gear system for providing intermittent and reciprocal motion. The gear system includes a drive gear and a driven gear. The gear system is adapted to have a non-rotating configuration and an engaged configuration. In the non-rotating configuration the driven gear is prevented from rotating, and a corresponding portion of the animated children's toy is not moving. In the engaged configuration the driven gear rotates and a corresponding portion of the animated children's toy moves.

Abstract: A sensor switch assembly intended for use inside a simulated mouth of a doll. The assembly includes a fixed structure having a guide channel and a micro-switch attached near the guide channel, a movable structure having a floating pivot that may pivot within and slide along the guide channel so that the micro-switch may be triggered by any combination of sliding or pivoting of the movable structure.

Abstract: An animated children's toy including a gear system for providing intermittent and reciprocal motion. The gear system includes a drive gear and a driven gear. The gear system is adapted to have a non-rotating configuration and an engaged configuration. In the non-rotating configuration the driven gear is prevented from rotating, and a corresponding portion of the animated children's toy is not moving. In the engaged configuration the driven gear rotates and a corresponding portion of the animated children's toy moves.