摘要:
A frequency synthesized receiver utilizes, as a local oscillator, a phase-locked circuit formed of a reference signal oscillator, a voltage controlled oscillator, a programmable divider, a phase comparator, and a low-pass filter. For tuning to a desired frequency, the dividing ratio of the programmable divider is controlled by an up/down counter connected in parallel with a shift register. The latter is supplied with a clock pulse signal and a binary coded selecting signal furnished from a micro computer. The selecting signal corresponds to a desired broadcast frequency. The up/down counter is caused by the micro computer to count up or down from the count value stored in the shift register, thereby causing the received frequency to rapidly sweep, at predetermined steps of, for example, 100 KHz.
摘要:
A tuning apparatus of phase-locked loop type having a voltage controlled oscillator which is working as a local oscillator of a tuning circuit, a programmable divider supplied with the output signal from the voltage controlled oscillator, a reference frequency signal generating circuit, a phase comparator supplied with the output signal from the voltage controlled oscillator and the output signal from the reference frequency signal generating circuit, and supplying the output signal to the voltage controlled oscillator, the programmable divider, the reference frequency signal generating circuit and the phase comparator being formed in a single integrated circuit, and a control circuit formed separately from the integrated circuit for supplying a control data to the programmable divider in the single integrated circuit is disclosed, in which the integrated circuit further comprises a memory for memorizing the control data which is serially supplied from the control circuit and supplying the control data to the programmable divider in parallel.
摘要:
An apparatus for plasma treatment of long continuous materials, typically sheet materials, which comprises a plasma treatment chamber, an electric power introducing member positioned in the central portion of the chamber, a plurality of antenna electrodes radially extending from the vicinity of the electric power introducing member, a plurality of grounded electrodes facing a treating surface of the antenna electrodes, the electric power introducing member being connected with the respective ends of the antenna electrodes closest thereto, and a guide means, i.e., guide rolls, for passing treating materials through gaps between the antenna and grounded electrodes. The antenna electrodes preferably have curved surfaces bulging out with respect to the direction of travel of the treating materials.
摘要:
A method of producing non-oriented magnetic steel heavy plate that has good magnetic properties in a low magnetic field that comprises hot-rolling high-purity steel, adjusting the crystal grain size and dehydrogenation treatment, whereby the a uniform ferrite grain diameter is imparted to the steel.
摘要:
Frequencies of plural peak signals which appear in a band ½ of a sampling frequency are detected from a spectrum obtained from a measuring target signal sampled with the sampling frequency in order to detect the repetition frequency of the measuring target signal having plural harmonic components with a similar power. Each of the plural peak signals is successively assumed to be a fundamental wave beat component originating from the fundamental wave of the measuring target signal and theoretical frequencies of harmonic beat components originating from harmonic components of the measuring target signal are successively calculated. The theoretical frequencies are compared with the frequencies of the plural peak signals to determine one of the plural peak signals as a fundamental wave beat component originating from the fundamental wave of the measuring target signal.
摘要:
An electrophotographic recording apparatus includes an exposing device for exposing a photosensitive member according to image data, a developing device for developing an electrostatic latent image created on the exposed photosensitive member, and a fixing device for fixing the developed image, and the exposing device includes an image data processing circuit for converting discontinuous black-level pixels included in the pixels of the image data which is constructed by a plurality of pixels selectively including black-level pixels and white-level pixels to a white level to create processed image data, and a line scanner for line-scanning the photosensitive member by a plurality of times according to the image data and the processed imaged data each time an image of one line is created so as to create an electrostatic latent image corresponding to a combination of the image data and the processed image data on the photosensitive member.
摘要:
A circuit switching system for switching a circuit from a telephone to a facsimile. Circuit switching is performed by a signal, designating circuit switching delivered to the circuit. The circuit is monitored. When a signal designating circuit switching is detected from the circuit, the circuit is switched automatically from the telephone to the facsimile and a starting signal is applied to the facsimile.
摘要:
In a method of detecting a repetition frequency of a measured signal, in order to detect the waveform repetition frequency of the measured signal with high accuracy even in the presence of a frequency fluctuation in the measured signal, the repetition frequency of the measured signal acquired by the conventional method is used as a provisional repetition frequency, and the frequency change amount of the specified signal obtained in the case where the measured signal is sampled sequentially with a sampling frequency greatly changed from the provisional sampling frequency to generate a frequency fold at the time of sampling is detected. Based on the detected frequency change amount of the specified signal and the change amount of the sample number indicating how many times the frequency fold has occurred in the process, the error contained in the sampling number with a frequency fluctuation contained in the measured signal is calculated. Then, based on the error contained in this sample number, the provisional repetition frequency of the measured signal is corrected, thereby calculating the regular repetition frequency of the measured signal.
摘要:
In a method of detecting a repetition frequency of a measured signal, in order to detect the waveform repetition frequency of the measured signal with high accuracy even in the presence of a frequency fluctuation in the measured signal, the repetition frequency of the measured signal acquired by the conventional method is used as a provisional repetition frequency, and the frequency change amount of the specified signal obtained in the case where the measured signal is sampled sequentially with a sampling frequency greatly changed from the provisional sampling frequency to generate a frequency fold at the time of sampling is detected. Based on the detected frequency change amount of the specified signal and the change amount of the sample number indicating how many times the frequency fold has occurred in the process, the error contained in the sampling number with a frequency fluctuation contained in the measured signal is calculated. Then, based on the error contained in this sample number, the provisional repetition frequency of the measured signal is corrected, thereby calculating the regular repetition frequency of the measured signal.
摘要:
A two-beam interferometer splits an incident light in two optical paths, combines and outputs split lights together again. The two-beam interferometer generates at least one or more combined light made from two beams each having a polarization different from each other. A polarization state detector detects a variation in the polarization of the combined light generated by the two-beam interferometer. An electric circuit calculates an wavelength of the incident light based on the variation in the polarization detected by the polarization state detector. The two optical paths of the two-beam interferometer has a difference in length between a point of splitting the incident light and a point of combining the split lights, for the detection of polarization variation in the combined light by the polarization state detector. The optical path length difference between the two paths is fixed.