Abstract: A two-transistor flash EPROM cell for high-speed high-density PLD applications is provided. The two-transistor cell includes a storage transistor connected in series to an access transistor. The storage transistor prevents problems associated with both over-erase and punch-through, and allows for scaling of the gate length to realize 5V cell programming.

Abstract: A two-transistor flash EPROM cell for high-speed high-density PLD applications is provided. The two-transistor cell includes a storage transistor connected in series to an access transistor. The storage transistor prevents problems associated with both over-erase and punch-through, and allows for scaling of the gate length to realize 5V cell programming.

Abstract: More than one security bit is used in a block of a PLD chip. The internal configuration and other information is left unprotected when all the security bits are in the erased state, and is protected by programming one or all the security bits. The security bits are located physically in proximity to the areas containing configuration and any other user-defined data, both so that they are difficult to discover and so that the erasure of all security bits in a EPROM-based PLD would cause a large number of adjacent user-defined bits to be erased as well, hence making it very difficult to extract useful information from a protected device by reverse engineering. Situating security bits in a different, pseudorandom location within each block of the chip makes them difficult to find and so further inhibits reverse engineering.

Abstract: A break-away coupling for mounting an elongated member, such as a roadside sign post, includes two opposingly fixed engagement members connected to one another end-to-end. The first engagement member is attached relative to the ground either by a plate or by a plate attached to a stake-like member. The second engagement member is attached to the elongated member. The engagement members have facing flange plates, each flange plate having an opening aligned with an opening in the other plate and a shear bolt projects through the openings to fix the flanges plates together. The shear bolt is either constructed of relatively easy-to-break material or includes a weakened area. When the elongated member is struck, the shear bolt breaks and the engagement members disconnect without damage. The bolt is easily replaced to quickly reassemble the sign post.

Abstract: A CMOS, N-well, P-channel static RAM cell with merged bipolar transistors as its output drivers.

Abstract: In a data communication network (100) wherein using units (104-111) contend for access to the network communication bus (160), data links (101-103) interface using units located remotely from the bus to the bus for communication such that the distances between the using units and the bus are rendered functionally transparent from the viewpoint of the bus.

Abstract: A digital logic circuit for eliminating spurious transient pulses (21, 32) from among genuine pulses (51) in a binary dial pulse stream. The dial pulse stream is coupled to the circuit input (46). Output (47) is prevented from matching the input unless the duration of the input change exceeds a first time interval (57). Moreover, if the input change exceeds the first time interval and the input change was from a first to a second predetermined binary signal, then the new output signal is held constant for a second time interval (56) regardless of any change in the input signal.

Abstract: This invention relates to a unique, improved, inexpensive, one-piece garment or equipment hanger which can be securely attached to the diagonal rod or wire, of which the common chain link type fence is constructed; and this hanger can be formed of such size and shape that it may be inserted along with the tennis balls at the ball packaging facility.