Abstract: A memory device comprises a memory cell and a sense amplifier which has a sensing interval. An output circuit is coupled to the sense amplifier and responsive to a clock signal to accept the signal from the sense amplifier. A first source of timing signals generates a first timing signal in response to an enable signal which is asynchronous relative to the clock signal. A second source of timing signals generates a second timing signal based on the clock signal. A switch selects one of the first and second timing signals at the timing signals for use to define pre-charge and sensing intervals for the sense amplifier. The first source of timing signals is selected during an interval of time corresponding to a clock latency, so that the timing signals define a sensing interval where transitions in the clock signal are outside of the sensing interval.

Abstract: A convex mirror assembly includes convex mirror and a back board, wherein each of the convex mirror and the rear box has a bent portion and a positioning ring encloses the bent portions. The positioning ring is composed of a plurality of sections and each section has a substantially C-shaped cross section which has an enclosing portion, a covering portion and a support potion extending transversely from a first end and a second end of the enclosing portion. Two respective distal ends of the bent peripheries are in contact with the support portion. The covering portion has an overlapping portion on a first end thereof and an engaging portion on a second end thereof, so that the overlapping portion of a first section is sized to overlap on the engaging portion of a second section next to the first section.

Abstract: A page mode program sequence is described that includes first and second bias applying cycles. In the first cycle, a program bias is applied to a first part of a page of memory cells, while a program verify bias is applied to, and data is sensed from, a second part of the page. In this manner, a first part of the page is programmed, while a second part of the page is verified. This operation is followed by a second bias applying cycle, in which a program bias is applied to the second part of the page, while a program verify bias is applied to, and data is sensed from, the first part of the page.

Abstract: A solar powered warning light device includes a housing having a front orifice, a solar panel disposed on top of the housing to receive solar energy, a circuit board disposed in the housing and having a converting device coupled to the solar panel, to receive and to convert the solar energy into electric energy and stored in one or more capacitors. The circuit board includes one or more light devices coupled to and energized by the capacitor, and engaged in the orifice of the housing, to emit light out of the housing. A switch may switch on and off the light device, and a photoactive member is coupled to the electric switch, to operate the electric switch by the light of the environment.