Abstract: A semiconductor memory, device of the invention includes memory cells each having a transistor and a capacitor, bit lines electrically connected to the memory cells, data Dines, transfer circuits each electrically connecting the bit lines and the data lines in response to column selection signals, and conductive lines each electrically connected between a transistor and a capacitor of memory cell selected ones of the and having a predetermined potential. Owing to this arrangement, the semiconductor memory device can be realized wherein volatile memory cells and non-volatile memory cells are provided within a single memory cell array. Further, the semiconductor memory device of the invention is of a semiconductor memory device having high flexibility, wherein the ratio between the volatile memory cells and the non-volatile memory cells can be easily decided according to a user's demand.

Abstract: Wavefront correction apparatus for correcting a stepped wavefront output produced by certain angles of scan and by certain positions of scan in scanning microlens arrays includes anamorphic transfer optics with diffractive corrections. The transfer optics form the outputs of all of the unit cell trains of the microlens arrays into a unique, separate, linear image at each position of scan of the scanning array. A stepped wavefront corrector is positioned in the path of each linear image, and selected thicknesses of the material in the stepped wavefront corrector are effective to vary the times of optical passage through the stepped wavefront corrector in amounts to restore the wavefront to a continuous, unstepped form at the outlet of the plate.

Abstract: The initial mode setting circuit 30 has a circuit 31 for generating a reset pulse RST after detecting that the power source voltage VCC has reached a specified value when the power source voltage VCC starts up, and fuses 32 to 37, each one end of which is commonly connected to the output end of the reset signal generating circuit 31 and the other ends of which are connected to one of either the set input end S or the reset input end R of the flip flops 11 to 13. The fuses 32 to 37 are melted and cut off electrically or with a laser.

Abstract: A reference scheme for verifying the erasing and programming in an electrically erasable and electrically programmable read-only memory fabricated on a silicon substrate which employs a plurality of memory cells, each of which contains a floating gate. The reference scheme employs trimmable single cell reference devices for both the erase verify and program verify operations. The threshold voltages of the reference cells are trimmed to a level below (in the case of the erase verify reference cell) or above (in the case of the program verify reference cell) which all memory cells in the array will be considered in a particular program state (i.e., erased or programmed). In the case of the read reference device, a double-cell read referencing device combining the erase and program verify reference cells is described. Although, the double-cell referencing device is preferred, a trimmable read reference device is also taught.

Abstract: A redundant decoder circuit includes a restoration circuit for restoring a decoder which activates a redundant memory cell. When the redundant memory cell which should store a predetermined information is disabled, the restoration circuit stops the decoder from supplying the active signal to the disabled memory cell. Therefore, the predetermined information is to be stored in another memory cell instead of the disabled memory cell, so that the redundant memory cell is used effectively.

Abstract: An anti-cycling device for high pressure sodium lamps detects an abnormal cycling condition by using a fiber-optic cable that extends between an anti-cycling controller board and the lamp itself. An outer end of the cable is arranged so that light emitted by the lamp will be transmitted to the controller board. A photocell mounted on the controller board, at the other end of the cable, transmits a variable magnitude electrical signal to the circuitry on the controller board. The signal varies in accordance with light being transmitted or not transmitted through the cable, as the case may be, corresponding to a cycling condition. In this manner, the controller board is able to detect a cycling condition, and thereby cause the power supply to the lamp to be cut off.

Abstract: An optoelectronic memory and logic device has a function of a reset-set flip-flop (RS-FF) or an exclusive-OR (EOR) gate. The RS-FF includes a first and a second optical inverter circuits. The optical inverter circuit includes a parallel connection of a light emitting device and a phototransistor, and a load resistor connected in series. The phototransistor in the first (second) optical inverter circuit receives the light from the lihgt emitting device in the second (first) optical inverter circuit. The RS-FF has high contrast ratio in case of emitting high output power, and operates stably when the load resistance and the bias voltage are fluctuated. The EOR gate comprises a parallel connection of an adder circuit and a multiplier circuit, and a load resistor connected in series. The adder circuit is a series connection of a light emitting device and a first phototransistor. The multiplier circuit is a series connection of a second phototransistor and a third phototransistor.

Abstract: The invention relates to a plasma reactor including a housing which receives a selected gas flow, a microwave generator, and waveguide means to supply the microwaves to the housing according to a non-resonant coupling wherein the housing does not dissipate in the form of electromagnetic radition the ultrahigh frequence energy which is imparted to the housing in the presence of gas. According to a general definition of the invention, the housing being of a large size, the terminal portion of the waveguide means is progressively reduced in one direction and widened in the other direction till it reaches a flat rectangular cross-section surrounding completely the housing, and it forms a non-resonant coupling with the housing.

Abstract: Annular arrangements of thermionic filaments adjacent opposite axial ends a chamber within which argon gas at low presure is confined, generate steady state plasma with uniformity by low energy emission of gas ionizing electrons from the filaments. The ionizing electrons and plasma generated are axially confined between grids at the axial ends of the chamber and radially confined by a low intensity magnetic field generated by an external magnetic coil.

Abstract: An improved electronic device allows for the feeding of an ion pump with a plurality of voltages that are changed as a function of the current drawn by the pump and therefore of the pressure value within the pump.

Abstract: A spark gap switch system is disclosed which is capable of operating at a high pulse rate comprising an insulated switch housing having a purging gas entrance port and a gas exit port, a pair of spaced apart electrodes each having one end thereof within the housing and defining a spark gap therebetween, an easily condensable and preferably low molecular weight insulating gas flowing through the switch housing from the housing, a heat exchanger/condenser for condensing the insulating gas after it exits from the housing, a pump for recirculating the condensed insulating gas as a liquid back to the housing, and a heater exchanger/evaporator to vaporize at least a portion of the condensed insulating gas back into a vapor prior to flowing the insulating gas back into the housing.

Abstract: An air ion emitter has a needle-like emitter coaxially mounted within a cylindrical barrel. The barrel is pivoted and rotatable on the base so that it can be pointed in any direction and angle, as at a collector at opposite plurality. The end of the barrel has venturi slots therein so that air flow induced by the emission of ions is radially inward and then axially out the end to scour the needle point and keep it sharp.

Abstract: A simplified row driver switching circuit for display panels and the like, including particularly electroluminescent (EL) panels, as well as plasma panels, using transformer coupling between the power supply and the row electrodes. The circuit limits energy transfer to each row electrode of the EL panel to minimize the effects of destructive arcing caused by inter-electrode shorts. The circuit is energy conservative and eliminates the need for, for example, -160V and +220V power supplies, and provides reduced stress levels for many components through transformer coupling, and all active switches are driven from ground potential. Two row driver circuits are disclosed (FIGS. 4 & 6), the latter, using a split primary coil and double sets of paired switches, allows the row electrodes to be driven to negative, as well as positive, voltages. The primary and secondary windings on the transformer (T.sub.1 of FIGS. 4 & 6) are used to store and transfer energy to the essentially capacitive row electrode load (C.sub.

Abstract: In a television receiver, a magnetic field compensator of a horizontal component of the earth's magnetic field includes a fluxgate magnetometer having a pair of sensing windings for generating first and second sensing signals representative of corresponding components of the horizontal component of the earth's magnetic field. The sensing signals generate current in a pair of substantially planar coils disposed in a non-parallel vertical configuration on the rear periphery of a cathode ray tube. The currents in the coils produce a magnetic field that compensates or neutralizes the effect of the horizontal component of the earth's magnetic field on the electron beam in the cathode ray tube. Whenever the position of the receiver is changed, rotationally or geographically, the current in the coils is automatically adjusted to provide automatic neutralization.