摘要:
A semiconductor device includes an MIS transistor and an electric fuse. The MIS transistor includes a gate insulating film formed on the semiconductor substrate, and a gate electrode including a first polysilicon layer, a first silicide layer, and a first metal containing layer made of a metal or a conductive metallic compound. The electric fuse includes an insulating film formed on the semiconductor substrate, a second polysilicon layer formed over the insulating film, and a second silicide layer formed on the second polysilicon layer.
摘要:
A fuse device and a program transistor are connected in series with each other. A flip-flop turns ON, in response to a start signal, the program transistor to start program of the fuse device. A 2-input NAND circuit outputs an end signal at a time point where change in a resistance value of the fuse device is increased to reach a predetermined level while monitoring change in the resistance value of the fuse device through change in a voltage at a junction point of the fuse device and the program transistor. The flip-flop turns OFF, in response to the end signal, the program transistor to automatically terminate the program of the fuse device. Thus, the resistance value of the fuse device is increased to the predetermined level in a minimum program time.
摘要:
Selection signals output from a decoder are selectively set at High according to the states (blown or not blown) or fuses in bit cells in a cell group specifying circuit. Then, one of transistor gates is turned ON so that a data bit cell group in/from which data is written and read out is selected. Accordingly, stored data can be rewritten multiple times by sequentially blowing the fuses in the cell group specifying circuit.
摘要:
A nonvolatile semiconductor memory device for storing data by accumulating charge in a floating gate includes a plurality of MOS transistors sharing the floating gate. In the device, a PMOS is used for coupling during writing and an n-type depletion MOS (DMOS) is used for coupling during erasure. Coupling of channel inversion capacitance by the PMOS is used for writing and coupling of depletion capacitance by the n-type DMOS is used for erasure, thereby increasing the erase speed without increase of area, as compared to a conventional three-transistor nonvolatile memory element.
摘要:
A circuit includes a plurality of stages each including a MOS transistor and a capacitor of which one end is connected to one of a drain and a source of the MOS transistor. The plurality of stages are connected with each other by cascade connection of the MOS transistors. A gate of the MOS transistor is connected electrically to one of the drain and the source thereof in each stage, and a substrate for at least one pair of adjacent MOS transistors are connected electrically to one of the drain and the source of one of the pair. The back bias effect is suppressed, and the layout area is reduced. Further, a plurality of booster capacitors connected in series are provided in succeeding stages, thereby suppressing degradation of breakdown voltage of each capacitor.
摘要:
A semiconductor integrated circuit device includes: first and second nonvolatile memory elements; a first amplifier for amplifying an output signal from the first nonvolatile memory element to output the amplified signal; and a second amplifier for outputting to the first amplifier a control signal generated by amplifying an output signal from the second nonvolatile memory element. The second amplifier fixes the output signal from the first amplifier at a high potential or a low potential based on data stored in the second nonvolatile memory element.
摘要:
A semiconductor memory device includes: first and second bit cells for storing complementary data; a scan circuit for outputting a selected data signal; a bit-cell selector receiving the output of the scan circuit and selecting one of the bit cells; and a data write controlling circuit for controlling data writing. Write paths for all the bit cells for storing “0” are not selected and data is written only in a bit cell for storing “1”, so that write operation performed in steps is achieved.
摘要:
A semiconductor memory device includes: an array of memory cells that is divided into a plurality of sub-arrays; main word lines; sub-word lines; sub-word select lines; and sub-word drivers. A predetermined number of main word lines are associated with a block of sub-arrays arranged on the same row, and extend over all of these sub-arrays. A set of sub-word lines are provided per sub-array and driven by the same number of sub-word drivers corresponding thereto. Each sub-word select line consists of: a parallel portion, which is placed in parallel to the main word lines; and a plurality of vertical portions crossing the main word lines at right angles. Each sub-word driver is selected by specifying, in combination, one of the main word lines and one of the sub-word select lines. In this arrangement, a difference in signal propagation delay between a main word line and an associated parallel portion of a sub-word select line can be minimized, thus remarkably increasing the operating speed of a semiconductor memory device like a DRAM.
摘要:
A video recording control device compares current and previous values indicated by an elapsed broadcast time information (TIS) of a program in an EDS (Extended Data Service) signal superimposed on a received television signal during its vertical blanking period, and controls the recording operation of a video recording apparatus employing the television signal according to the result of comparison. Therefore, the ending time of the program being recorded can be detected by utilizing the TIS of the EDS signal, and thus, even when the broadcast time of the program is extended without notifying in advance, the recording can be continued accordingly.