摘要:
A semiconductor memory in which a layout margin at the contact hole between wiring layers of a SRAM does not need and the wiring capacity at bit lines is reduced and the high speed processing is made to be possible is provided. The SRAM is constituted of a pair of driving transistors Qd1 and Qd2, a pair of transferring transistors Qt1 and Qt2, high resistance loads R1 and R2, a pair of bit lines BL1 and BL2, and a VCC line and a GND line. Gate electrodes of each transistor and word lines are formed at a first layer, the high resistance loads are formed at a second layer, the VCC line and the GND line are formed at a third layer, and the bit lines are formed at a fourth layer. A shared contact hole using for connecting the high resistance loads to the source/drain area of transistors does not penetrate the other conductive layers. Therefore, the layout margin between the shared contact hole and the other conductive layers becomes unnecessary and the reduction of the cell size becomes possible.
摘要:
A multi-input semiconductor logic device capable of high-speed operation includes a first to fifth source/drain regions formed in an active area, and first to fourth gate electrodes formed over the active area through a gate insulating layer. The first to fifth source/drain regions are arranged along an axis of the active area. The second and fourth source/drain regions are located to be adjacent to the first source/drain region at each side of the first source/drain region. The third and fifth source/drain regions are located to be adjacent to the second and fourth source/drain regions, respectively. The first gate electrode is located between the first and second source/drain regions. The second gate electrode is located between the first and fourth source/drain regions. The third gate electrode is located between the second and third source/drain regions. The fourth gate electrode is located between the fourth and fifth source/drain regions. The first and fourth gate electrodes are electrically connected to be applied with a first digital input signal. The second and third gate electrodes are electrically connected to be applied with a second digital input signal. The third and fifth source/drain regions are electrically connected.
摘要:
A built-in supply voltage dropping circuit according to the present invention includes a current mirror amplifier, a drive transistor with a gate connected to an output of the current mirror amplifier and a drain connected to the output terminal, and a current limiting device connected in series to the current mirror amplifier and adapted for controlling the current flow through the current mirror amplifier by control signals. This construction enables reduction of current consumption without lowering response speed.
摘要:
An SRAM cell 1 includes inverters 10, 20, N-type FETs 32, 34, 36, 38, word lines 42, 44, bit lines 46, 48, and voltage applying circuits 50, 60. The voltage applying circuits 50, 60 apply a voltage Vdd to the word lines 42, 44 at the time of a read operation of the SRAM cell 1. The voltage applying circuits 50, 60 apply a voltage (Vdd+α) to the word lines 42, 44 at the time of a write operation of the SRAM cell 1. Here, α>0. Namely, the SRAM cell 1 is configured in such a manner that a voltage applied to word lines 42, 44 at the time of the write operation is higher than at the time of the read operation.
摘要翻译:SRAM单元1包括反相器10,20,N型FET32,34,36,38,字线42,44,位线46,48和电压施加电路50,60。 电压施加电路50,60在SRAM单元1的读取操作时对字线42,44施加电压V dd。 电压施加电路50,60在SRAM单元1的写入操作时对字线42,44施加电压(V SUB +Δ+α)。 这里,alpha> 0。 也就是说,SRAM单元1被配置成使得在写入操作时施加到字线42,44的电压高于读取操作时的电压。
摘要:
A recording and/or playback apparatus that uses a tape cassette having protrusions is equipped with a mounting section, a lid, a holder, and a detection mechanism. The mounting section is to be mounted with a tape cassette. The lid, which is to open or close the mounting section, is provided so as to be movable between a closed position for closing the mounting section and an open position for opening the mounting section. The lid is provided in front of the holder. The holder holds a tape cassette that has been inserted in the apparatus, and causes the tape cassette held by the holder to be mounted in the mounting section when the lid is moved to the closed position. The detection mechanism indicates whether a tape cassette is mounted in the mounting section. When the lid is located at the closed position, the protrusion of the tape cassette that is mounted in the mounting section manipulates the detection mechanism so that the detection mechanism projects from the front surface of the lid.
摘要:
The semiconductor memory device according to this invention includes a memory cell array which comprises plural memory cells arranged in row and column direction in the form of an array, plural bit line pairs for connecting these memory cells in the unit of a column and word lines for connecting these memory cells in the unit of a row, sense amplifiers which are respectively connected to each of the bit line pairs at one end thereof and which amplify the potential difference between the bit lines of each pair in response to activation signals, and transfer gate means which divide said plural bit lines respectively into at least two portions corresponding to control signals, the sense amplifiers for the bit line pairs which belong to the nth columns (n is an odd numbered integer) thereof being arranged on one end of the bit line pairs and on the other end thereof for the those which belong to the (n+1)th columns. This construction of the device can prevent crosstalk which would otherwise caused between adjacent bit line pairs immediately after the sense amplifiers are activated.
摘要:
This invention relates to infrared slight energy radiation powder and synthetic fiber containing the radiation powder mixed therein and fiber articles made of the synthetic fiber.The radiation powder comprising chiefly alumina, titanium and platinum or palladium, or, alumina, silica and palladium provides sufficient quantities of infrared slight energy radiation having a wide wavelength range. The clothes and bedding made of the synthetic fiber containing infrared slight energy radiation powder are warm and heat-retaining. And the wrapping articles for fresh meat and fish made in relation with the present invention are antibacterial and effective for keeping freshness of the wrapped food.
摘要:
Two switches are provided to a semiconductor circuit which includes cascade connected first circuit section and second circuit section, each having an inverter formed by complementary transistors connected between a power terminal and a grounding terminal. The first switch is inserted between the first circuit section and the second circuit section and forms a current path of the electrical charge during the state transition of the circuit. The second switch is inserted between the input end and the power terminal of the second circuit section and controlled by the output signal for the second circuit section.
摘要:
Disclosed herewith is a semiconductor device having an SRAM cell array capable of easily evaluating the performance of transistors and the systematic fluctuation of wiring capacity/resistance. In order to form an inversion circuit required to form a ring oscillator, a test cell is disposed at each of the four corners of the SRAM cell array and the ring oscillator is operated while charging/discharging the subject bit line. Concretely, the ring oscillator is formed on a memory cell array and the ring oscillator includes test cells disposed at least at the four corners of the memory cell array respectively. At this time, a wiring that is equivalent to a bit line is used to connect the test cells to each another.
摘要:
The SRAM cell 1 includes inverters 10, 20, N-type FETs (Field Effect Transistors) 32, 34, 36, 38, word lines 42, 44, and bit lines 46, 48. A gate width W2 and gate length L2 of the FETs 32, 34, 36, 38 are equal to a gate width W3 and gate length L3 of the FETs 12, 22, respectively. In particular, in this embodiment, a gate width W4 and gate length L4 of the FETs 14, 24 are also equal to W2 (=W3) and L2 (=L3), respectively. Namely, the SRAM cell 1 is designed in such a manner that W2=W3=W4, and L2=L3=L4.
摘要翻译:SRAM单元1包括反相器10,20,N型FET(场效应晶体管)32,34,36,38,字线42,44和位线46,48。 FET32,34,36,38的栅极宽度W 2和栅极长度L 2分别等于FET 12,22的栅极宽度W 3和栅极长度L 3。 特别地,在本实施例中,FET 14,24的栅极宽度W 4和栅极长度L 4也分别等于W 2(= W 3)和L 2(= L 3)。 即,SRAM单元1以W 2 = W 3 = W 4,L 2 = L 3 = L 4的方式设计。