Abstract: A circuit for modulating an N-phase first waveform having a frequency F.sub.O with an N-phase second waveform having a frequency F.sub.M. The circuit includes N number of limited swing driver circuits. Each limited swing driver circuit has generator means for generating one phase of a third waveform in response to one phase of the first waveform so that the third waveform has a frequency F.sub.O and a voltage swing that is less than a voltage swing of the first waveform. The circuit also includes N number of multiplier circuits. Each multiplier circuit is coupled to one of the limited swing driver circuits and has multiply means for multiplying one phase of the third waveform with one phase of the second waveform and for generating first and second currents having a difference which is proportional to a product of the one phase of the third waveform and the one phase of the second waveform.

Abstract: A data alignment logic cell properly aligns the individual data units (e.g., bytes) in a block of data that is transferred in a multiple bit bus such that the data units in the block are transferred to desired lanes of the bus. The data alignment logic cell includes a gathering unit, which aligns the data units into a fixed, justified arrangement in the bus, and a scattering unit, which receives the data units from the gathering unit and realigns them to the desired lanes. Both the gathering and scattering units contain registers for temporarily storing certain of the data units and multiplexers for transferring the data units between the lanes of the bus, the state of the multiplexers being determined by signals from control units.

Abstract: This invention is to provide a kind of sporting toy car for children, which mainly raises children's interest in toys of this type and provides a wholesome physical exercise for children playing with it to promote their growth.