Abstract: A pulse width modulator has a first clock source providing a clock signal to a set input of an output controller configured to set a pulse width output signal and having a reset input to reset the pulse width output signal. A duty cycle control unit is coupled with the reset input of the output controller, wherein the duty cycle control unit has a numerical controlled oscillator (NCO) being coupled with a register and configured to provide for a direct digital synthesis to produce a specified frequency according to a value set in the register. Furthermore, logic is provided for receiving a signal from a second clock source and the pulse width output signal to trigger the numerical controlled oscillator.

Abstract: Apparatus for dispensing lids and other articles such as plates, condiments, etc. comprising a threaded shaft powered by an electric motor which is used to raise a stack of items from the bottom of a storage hopper. A vacuum system, in a first embodiment comprised of a fan and a sliding tube, lifts the top most item from the stack, making it available to a user. A sensor at the top of the dispenser is used to detect the absence of an item in the dispensing position and again raises the stack of items, placing the top most item in position to be raised up by the vacuum system and again made ready for pick up by the user.