Seiji Okamoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: An apparatus for treatment of fluorine waste water has an introduction tank, a main treatment tank, a calcium hydroxide tank, a polychlorinated aluminum tank, a macromolecular flocculant tank, a settling tank, and a concentration tank. Fluorine waste water is introduced from the introduction tank into a lower part of the main treatment tank through a lower inlet pipe. Also, return sludge from the concentration tank and silicon sludge from a silicon waste water treatment system are introduced into an upper part of the main treatment tank. Thus, silicon recovered from silicon waste water is recycled for treatment of fluorine waste water. Also, unreacted chemicals, which have been loaded in the calcium hydroxide tank, polychlorinated aluminum tank, macromolecular flocculant tank, are recycled. The main treatment tank has no stirrer and thus conserves electrical energy, but can still neutralize the waste water.
January 28, 2000
Date of Patent:
July 2, 2002
Sharp Kabushiki Kaisha
Kazuyuki Yamasaki, Kazumi Chujo, Seiji Okamoto, Yukihiro Tao
Abstract: Ultrapure water having a reduced amount of TOC and a low electrical conductivity is produced in correspondence with a variation in water quality of raw water. A first water tank has an anaerobic organic matter treatment chamber and an aerobic organic matter treatment chamber which are communicated with each other at their bottom portions. Activated carbon bags are arranged in upper portions of both the chambers, and Bincho charcoal is stowed in the lower portion of the chambers. With this arrangement, carbon compounds and organic nitrogen compounds in the water to be treated are biologically treated by microbes, thereby reducing the TOC. Furthermore, nitrate nitrogen generated through the organic nitrogen compound treatment process is denitrified by the anaerobic microbe, thereby reducing the electrical conductivity of the water to be treated.
Abstract: Harmonic signals of frequencies have a relation fn=f1*n* .sqroot.1+C*n.sup.2 /.sqroot.1+C where C is a constant and n is a harmonic number relative to the fundamental frequency f1, are generated and synthesized to produce a modified sound that can be heard comfortably by human ears.
Abstract: An operational amplifier capable of supplying a large power approximate to a power supply voltage to a load resistance and of rendering the current consumption relative to the power supply voltage small when a signal is not issued. The operational amplifier comprises a first differential amplifying stage, a first amplifying stage, a first level shifting stage, a second differential amplifying stage, a second amplifying stage, a second level shifting stage, and outputting stage, a first phase compensation circuit and a second compensation circuit. The first differential amplifying stage differentially amplifies input signals while n-channel transistors serves as a differential amplifying elements. The second differential amplifying stage differentially amplifies input signals while p-channel transistors serves as a differential amplifying elements. The first amplifying stage amplifies an output of the first differential amplifying stage in opposite phase.
Abstract: A PLL is provided which is capable of following an input frequency over an extensive range without incurring an increase in the size of circuit arrangement. The PLL 100 includes a band-selectable voltage-controlled oscillator, and a band selection controller. The band selection controller monitors a comparison output from a phase detector and an output from a low-pass filter to deliver a band selection signal, which switches an oscillation band of the voltage-controlled oscillator. Instead of using the band-selectable voltage controlled oscillator, a programmable frequency divider may be used, and its frequency division factor may be changed responsive to the band switching signal.
Abstract: There is provided an ultrapure water production system which allows recycled waste water to be microbially treated and thereby reclaimed without causing any clogging of treatment system due to abnormal propagation of microorganisms, and which allows ultrapure water with 1 ppb or lower TOC to be obtained. This ultrapure water production system includes a lower part having an anaerobic organism treatment part (12), and an upper part which is placed above the lower part via a separating wall W.sub.B having an opening (16) and which has a biological treatment equipment including an aerobic organism treatment part (1). Since lower anaerobic microorganisms and upper aerobic microorganisms consume nutrition sources for microorganisms, treated water which is difficult for microorganisms to propagate can be obtained. Further, not only TOC but also organic nitrogen compounds are treated by the microorganisms, by which treated water with low electrical conductivity can be obtained.
Abstract: The present invention aims to provide a linear type digital-to-analog converter which has a great freedom of design and then is not affected by a parasitic capacity. The linear type digital-to-analog converter comprises a lower digital-to-analog converting portion having a plurality of lower serial circuits connected in a ladder manner between a lower output line, and an earthed line and a reference voltage line, the lower serial circuit comprising a lower capacitor and a lower transfer type switch, and a weighted second capacitor connected between the lower output line and the earthed line, an upper digital-to-analog converting portion having a plurality of upper serial circuits connected in a ladder manner between an upper output line, and the earthed line and the reference voltage line, the upper serial circuit comprising an upper capacitor and an upper transfer type switch, and the lower output line and the upper output line are connected through a coupling capacitor.
Abstract: Only in a transient band of a filter, substantially all frequency bands of the musical tone waveform are subjected to filter processing. Due to this, the drawback that the amount of change of the frequency characteristic of the musical tone gradually changes as a whole from a fundamental wave toward a harmonics and only one part of the frequency characteristic of the musical tone changes is eliminated.Also, the density of frequency components of the frequency band of the musical tone waveform does not change, the related frequency band is shifted in frequency, subjected to filter processing, and further shifted to a frequency in accordance with the musical tone pitch. Due to this, a specific range of the filter characteristic is selected, and the musical tone is subjected to the filter control only within this range.
Abstract: Ratios of frequencies of frequency components of formant waveform signals are changed, and consonance of frequency components of a musical tone is controlled. Moreover, amplitudes, frequencies or numbers of formants are controlled depending upon the musical factors, making rich the contents for changing the musical tones.
Abstract: An electronic musical instrument produces musical tones based on waveform data, while providing smooth changes between different timbres and at the same time avoiding reduction in the efficiency of waveform compression. The timbre change is carried out in an interpolation interval, the magnitude of which varies in accordance with the magnitude of the timbre change. The data necessary to establish the interpolation interval may be stored and read out of a memory or may be determined by interpolation according to a linear function.
Abstract: In an electronic instrument, sound waveform is compressed for efficient storage, while quick response from the depressing of keys till the sounding is assured. The electronic instrument is provided with the waveform ROM for storing the waveform of the start of sounding without compressing. The subsequent waveform is compressed and stored in the waveform ROM. The sound source system having a waveform reproducing portion is also provided for developing the compressed stored waveform. The electronic instrument is further provided with a waveform RAM for temporarily storing the waveform developed by the waveform reproducing portion. When the keys of the electronic instrument are depressed, sounds are generated at first based on the uncompressed waveform data, and the compressed waveform data is concurrently developed in the waveform RAM. After all the uncompressed waveform data is read from the waveform ROM, sounds are subsequently generated based on the waveform data developed by the waveform RAM.
Abstract: In a codec having a coding section A/D converting an analog signal into a digital signal, and a decoding section D/A converting a received digital signal into an analog signal, a decoding timing generating circuit (50) is provided to generate a D/A conversion timing signal (S50) on the basis of a clock signal (S30b) generated by a coding PLL circuit (30) and a reading completion signal (S61a) supplied from decoding controller (61). In synchronism with this signal (S50), a D/A converter 62 converts the digital signal Di read by the decoding controller 61, into an analog signal, and sends it to the decoding filter 63. The decoding filter (63) operates synchronism with the clock signal (S30b) generated by the coding PLL circuit (30) to filter the output of the D/A converter (62), and outputs it as the analog signal (Ao).
Abstract: An electronic sound processing system comprises a sound waveform looping apparatus which cuts out a portion of an input sound waveform and conducts a looping process for a predetermined cycle of the portion of the waveform. The sound waveform looping process comprises a discrete Fourier transformer for applying a discrete Fourier transform to the input sound waveform, a frequency band remover for removing a predetermined frequency band of the discrete Fourier transformed sound waveform, an inverse discrete Fourier transformer for applying an inverse discrete Fourier transform to the sound waveform from which the predetermined frequency band has been removed, and a looping processor for looping a predetermined cycle of the inverse discrete Fourier transformed sound waveform. By executing the sound waveform looping process, the electronic sound processing system can obtain smooth looped waveforms with easy processes and simple equipment.
Abstract: An analog front-end circuit has a low-group low-pass filter and a low-group high-pass filter connected in series, a high-group low-pass filter and a high-group high-pass filter connected in series, and switching means enabling the low-group high-pass filter and high-group low-pass filter to be connected in series, thus providing three bandpass filters with different passbands.
Abstract: An operational amplifier circuit is composed of a differential amplifier circuit for delivering a signal which is obtained by amplifying a difference between voltage levels of two signals; a level shift circuit for shifting and delivering the voltage level of the signal delivered from the differential amplifier circuit; a first amplifier circuit for amplifying and delivering the signal from the level shift circuit; and a second amplifier circuit for amplifying and delivering the voltage level of the signal delivered from the differential amplifier circuit, and a CMOS output circuit whose conductive state is controlled in accordance with voltage levels of the signals delivered from the first and second amplifier circuits.
Abstract: A liquid crystal display device comprises a pair of opposed substrates, a transparent electrode on at least one of the substrates, a liquid crystal composition, a characteristic orienting film comprising an organic high copolymer resin film formed at least over the surface of the electrode, and which shows an excellent orientation, and conductive particles mixed within the orienting film to reduce the resistance of the orienting film.