摘要:
The described embodiments of the present invention provide a memory cell and method for fabricating that memory cell and memory array including the cell. The memory cell is a trench capacitor type having a transistor (1-1-2) formed on the surface of a major face of a substrate (16) and having a capacitor (2-1-2) formed in the substrate around the periphery of a trench. The capacitor and transistor are connected by a buried, heavily doped region (26) having the opposite conductivity type from the substrate. A doped storage area (24) having the same doping type as the buried doped region surrounds the trench. A field plate (30) is formed in the trench separated from the storage region by a dielectric layer (32). The field plate extends onto the isolation areas between memory cells thus providing isolation between cells using a minimum of surface area. A self-aligned process is used to form the source (14) and drain (12) for the pass gate transistor and automatic connection between the source of the transistor and the buried doping layer is made by the buried N+ layer. A sidewall silicon nitride passivation filament (38) is formed to protect the sidewalls of the interlevel insulator region between the first (30) and second (3-3, 3-4) polycrystalline silicon layers.
摘要:
The described embodiments of the present invention provide a memory cell and method for fabricating that memory cell and memory array including the cell. The memory cell is a trench capacitor type having a transistor (1-1-2) formed on the surface of a major face of a substrate (16) and having a capacitor (2-1-2) formed in the substrate around the periphery of a trench. The capacitor and transistor are connected by a buried, heavily doped region (26) having the opposite conductivity type from the substrate. A doped storage area (24) having the same doping type as the buried doped region surrounds the trench. A field plate (30) is formed in the trench separated from the storage region by a dielectric layer (32). The field plate extends onto the isolation areas between memory cells thus providing isolation between cells using a minimum of surface area. A self-aligned process is used to form the source (14) and drain (12) for the pass gate transistor and automatic connection between the source of the transistor and the buried doping layer is made by the buried N+ layer. A sidewall silicon nitride passivation filament (38) is formed to protect the sidewalls of the interlevel insulator region between the first (30) and second (3-3, 3-4) polycrystalline silicon layers.
摘要:
A vehicle control unit comprises an interface software memory for storing an interface software program for connecting an application software program with an operating system in an internal ROM, a central processing unit for performing computation of the application software program and the interface software program, an erasable memory for storing data such as the result of computation, an I/O unit for extending the control unit, and extending means for communicating memory data through a bus or a LAN. A single-chip micro-computer is used in vehicle control.
摘要:
A multiplication, division and square root extraction apparatus which calculates the solutions to addition, division and square root extraction functions by approximation using iteration has a multiplier, an adder-subtracter and a shifter of prescribed bit width connected to a bus. Iteration is conducted by inputting the output of the multiplier to the adder-subtracter or the shifter and returning the result to the input of the multiplier via the bus. A shifter and an arithmetic and logic unit connected to a second bus connected to the aforesaid bus via a switch have a greater bit width than the prescribed bit width and are used for large scale calculations, thus preventing a reduction in processing speed.
摘要:
The present invention relates to a controller for an electric vehicle in which right and left drive wheels are respectively driven by drive motors which are individually provided. The controller for an electric vehicle comprises motors for driving right and left wheels, means for detecting rotating speeds or rotation torques of the wheels, and a facility for taking a rotation deviation between output signals from the detection means close to zero. As a result, the vehicle is always operated in safety.
摘要:
In an apparatus of detecting an environmental physical quantity such as magnetism and temperature by utilizing a sensitive element having an internal, electrical physical quantity which changes as the environmental physical quantity changes, an external operator element is provided which acts, when the environmental physical quantity acting on the sensitive element changes, a physical quantity corresponding to the change on the sensitive element, an electrical quantity supplied to generate in the external operator a physical quantity corresponding to the change is detected, and the environmental physical quantity is detected from the electrical quantity to provide a detection signal devoid of hysteresis and "depression".
摘要:
There is provided position error computing means for sampling an error value between a position detecting signal derived from means for detecting the position of a moving body and a position command signal supplied from outside and for computing a position error value on the basis of two or more past values of said error values. There is also provided a position control apparatus in which the magnitude of a gain of a position control loop is changed according to the above described position error value. Further, there is also provided a signal reproducing apparatus or a magnetic signal reproducing apparatus using the above described position control.
摘要:
A pulse width control apparatus and method for controlling motor speed wherein the number of pulses relating to more speed feedback data is counted so as to control the speed of the motor in accordance with a speed command data and a pulse width modulation signal based on the counted number of pulses. A free-running hardware timer and a soft-timer on a program controlled by an instruction execution time of a microcomputer are arranged so that ON-time data and OFF-time data of the pulse width modulation signal are selectively set in one and the other of the hardware and soft-timers in dependence on values of the ON and OFF times, respectively. The ON and OFF states of the pulse width modulation signal are changed when the contents of the hardware and soft-timers reach predetermined values so as to control the pulse width thereof.
摘要:
A method for detecting the position and the velocity by using an encoder mounted directly on a moving body wherein original signals of the encoder are pulse-width modulated by using a sampling carrier wave and the position is detected by measuring the width of the pulses thus obtained. An apparatus for implementing the method comprises a carrier wave generation circuit, a pulse width modulation circuit which pulse-width modulates the original signals coming from the encoder by using the carrier wave, a pulse width timer which measures the width of the pulses thus modulated, and a microcomputer connected to the pulse width timer.
摘要:
A rotary cylinder apparatus comprises a rotary drum mounted thereon with a magnetic head, a brushless motor for driving the rotary drum, a stationary drum housing the brushless motor and which is disposed opposing the rotary drum, and a revolution-rate detector for detecting the number of revolutions of the rotary drum. The brushless motor comprises a permanent magnet rotor connected to the rotary drum, a driving coil mounted on the stationary drum, and a position detector for detecting the position of the permanent magnet rotor in order to control current to be supplied to the driving coil. The detecting coil of the revolution-rate detector and the brushless motor are housed in the stationary drum and wiring of the driving coil and revolution-rate detecting coil is performed on a common wiring board. Thus, the driving section of the rotary cylinder apparatus is small-sized and made light in weight, and the number of processes of assembling the rotary cylinder apparatus can be decreased.