Abstract: A method of manufacturing a pressed powder magnetic core disclosed herein may include: mixing soft magnetic metal particles, low-melting-point glass particles and lubricant and heating a mixture of the soft magnetic metal particles, the low-melting-point glass particles and the lubricant at a temperature that is higher than a melting point of the lubricant and is lower than a softening point of the low-melting-point glass particles so as to obtain powder of coated metal particles in which surfaces of the soft magnetic metal particles are coated by the lubricant and the low-melting-point glass particles are distributed in coating layers of the lubricant; filling a mold with the powder; press-molding the powder in the mold; and annealing the press-molded powder. In the pressed powder magnetic core, an amount of the low-melting-point glass particles may be 0.1 wt % to 5.0 wt % relative to an amount of the soft magnetic metal particles.

Abstract: A dust core includes: a plurality of soft magnetic particles each composed of an iron-based alloy containing aluminum, each of a surface of the plurality of soft magnetic particles being coated with an aluminum nitride film; and an aluminum oxide film with which at least the aluminum nitride films located at a surface of the dust core are entirely coated.

Abstract: The N1(s) turns of a first output winding is divided by a split ratio ? into N1a(s) turns of a lower-layer first output winding and N1b(s) of an upper-layer first output winding. The lower-layer first output winding is continuously wound around all slots as the undermost layer. A second output winding is continuously wound around all slots over the lower-layer first output winding. An upper-layer first output winding is continuously wound around all slots over the second output winding. The split ratio ? is adjusted only in the slots where the detection accuracy decreases. This equalize the contribution of the first output windings and the second output winding to the flux linkage, thereby achieving high angle detection accuracy.

Abstract: The N1(s) turns of an output winding is divided by a split ratio ? into N1a(s) turns of an output winding (1a) and N1b(s) turns of an output winding (1b). The output winding (1a) is continuously wound around all slots as the undermost layer. Output winding 2, which is different in phase by 90 degrees from the output winding (1a), is continuously wound around all the slots over the output winding (1a). An output winding (1b) is continuously wound around all the slots over output winding 2. This equalizes the contribution of the output winding and output winding 2 to the flux linkage, thereby achieving high angle detection accuracy.

Abstract: The N1(s) turns of an output winding is divided by a split ratio ? into N1a(s) turns of an output winding (1a) and N1b(s) turns of an output winding (1b). The output winding (1a) is continuously wound around all slots as the undermost layer. Output winding 2, which is different in phase by 90 degrees from the output winding (1a), is continuously wound around all the slots over the output winding (1a). An output winding (1b) is continuously wound around all the slots over output winding 2. This equalizes the contribution of the output winding and output winding 2 to the flux linkage, thereby achieving high angle detection accuracy.

Abstract: The N1(s) turns of a first output winding is divided by a split ratio ? into N1a(s) turns of a lower-layer first output winding and N1b(s) of an upper-layer first output winding. The lower-layer first output winding is continuously wound around all slots as the undermost layer. A second output winding is continuously wound around all slots over the lower-layer first output winding. An upper-layer first output winding is continuously wound around all slots over the second output winding. The split ratio ? is adjusted only in the slots where the detection accuracy decreases. This equalize the contribution of the first output windings and the second output winding to the flux linkage, thereby achieving high angle detection accuracy.

Abstract: There is disclosed an image forming apparatus for generating a printing signal having a pulse width according to image density data corresponding to an image to be formed and forming dot images on a paper, each dot image having a size corresponding to the pulse width. An integrating circuit integrates the image density data for a predetermined integration period and outputting integrated image density data, and a comparator compares the integrated image density data with a predetermined threshold data and generating a printing signal having a pulse width corresponding to the comparison result thereof.

Abstract: An apparatus such as a digital printer for forming a image with use of electrophotographic process with a reversal development system, the density is controlled automatically by varying the sensitizing electric potential V.sub.O of the photoconductor and the bias electric voltage V.sub.B of the development unit according to the detected density of the standard toner pattern, while gradation correction fog elimination and/or color balance can be performed at the same time automatically or manually by adjusting V.sub.O and V.sub.B.

Abstract: A lower fatty acid ester such as ethyl acetate or ethyl acrylate is prepared by a process in which a lower fatty acid such as acetic acid or acrylic acid is reacted with a lower olefin such as ethylene by using as solid catalyst a heteropoly-acid or its salt. The esterification is carried out in gaseous phase.

Abstract: An image forming apparatus such as a digital color copy machine is disclosed. The image forming apparatus provides an image reader, an amplifier for amplifying image signals read by the image reader, a laser driver for driving a laser diode to form an image on a recording medium and a switching circuit for switching the amplification gain according to the kind of image to be formed.

Abstract: There is disclosed an image forming apparatus having a function for correcting the gradation characteristic of an image formed so as to be linear to the gradation degree.The image forming apparatus has a correction circuit for correcting inputted graduatin data to gradation data having a number of gradation degrees larger than that of the inputted gradation data to represent gradation data of a document image more precisely, for example in a range of low gradation.There is also disclosed a test mode for detecting an actual .gamma.-characteristic of the image forming apparatus by measuring toner densities of test images formed on a recording medium beforehand.

Abstract: There is disclosed an image forming apparatus comprising a semiconductor laser diode for emitting a laser light onto a photoconductor so as to form an electrostatic latent image thereon. The electrostatic latent image is developed using toner so as to form a visible toner image on the photoconductor, and there is set a predetermined bias voltage to be supplied to the laser diode. The set bias voltage is applied to the laser diode, and also a driving voltage is applied thereto responsive to image data. When no image data are inputted, the predetermined bias voltage is applied to the laser diode, and a density of a toner image formed on the photoconductor is detected. A controller sets a bias voltage to be applied to the laser diode responsive to the detected density of the toner image.

Abstract: A data processor for generating character images in a bit map memory according to character code data obtained from an external host computer. The data processor transforms the orthogonal positional data of the character code data into linear addresses for use in a linear address space where the linear address space has an origin corresponding to the origin of said orthogonal coordinate.

Abstract: Clocking circuitry for a character generator wherein a control microprocessor controls character generated by hardwired logic through an interface microprocessor, the clocking circuitry including an oscillator which supplies an output to a divider which supplies a reduced frequency signal to the control microprocessor. The output of the oscillator is also supplied to the output of a timing controller. The timing controller further receives a print signal from the interface microprocessor and supplies a plurality of timing signals to the hard wired logic character generator.

Abstract: A character image generating circuit includes a text buffer for storing character code data corresponding to one page, a first memory for storing character image data corresponding to a section of one page, and a second memory for storing compressed character image data corresponding to one page. A depiction control unit coupled with a font memory is provided for converting the character code data, a section at a time from the text buffer, to character image data which is temporarily stored in the first memory. The depiction control unit also compresses the character image data obtained from the first memory to produce compressed character image data which is stored in the second memory. The second memory further receives compressed character image data of other sections. A reconstruction circuit is provided for reconstructing the compressed character image data of one page from the second memory back to the original character image data.

Abstract: A signal processing device comprises buffer memory means for outputting a coded signal in parallel by a signal of predetermined bits, shifting means for shifting the coded signal so that the head bit of the coded signal become the head of the outputted signal, decoding memory means for decoding the coded signal to a run length signal having information of the run length of the coded signal, and outputting a shifting signal designating a bit number of the coded signal corresponding to the number to be shifted, into said shifting means. Accordingly, said signal processing device enables to decode a coded signal at a higher speed than a conventional image signal processing device and to output an image signal into an electrophotographic printer or a CRT display, synchronizing with a processing speed of the electrophotographic printer or a sub scanning speed of the CRT display.

Abstract: A character generator, comprising: a font memory for storing dot patterns of fonts; a first-in first-out memory for loading dot pattern data in unit of one byte successively, which generates a load request signal when the memory has empty spaces; an input control unit for accessing a dot pattern of a font to be printed and for transmitting a dot array data of one byte to the first-in first-out memory when the load request signal is received; and an output control unit for sending an output request signal to the first-in first-out memory to receive dot array data from the first-in first-out memory, and for transmitting the dot array data to a dot-image printer synchronously with a load request signal from the dot-image printer.

Abstract: A character signal generator which is capable of processing a large amount of data at a high speed without increase of the load of software and also capable of effectively using the storing region of text buffer by employing the circuit structure that the character codes to be output are continuously written on the text buffer and the row end code is written at the end of each row, thereby when this code is detected, the counting operation of address counter is suspended.

Abstract: Disclosed herein is a character generating device of a raster scan system which comprises a region data storage means for storing display region data predetermined with respect to each of the character codes and a region counter which is set by the display region data. The region data storage means and the region counter are correlated with each other, whereby the dot output is counted by the region counter for generating a signal to output the next character when the count value reaches a set region datum value.