摘要:
A small-sized, high-efficiency semiconductor amplifier exhibits a satisfactory efficiency characteristic over a wide band and a low output level for secondary and tertiary higher harmonics. The semiconductor amplifier is equipped with an output circuit which is composed of a parallel resonance circuit for the secondary higher harmonic of the fundamental-operation frequency, a first connection line, a second connection line, and an open-end line having a length corresponding to approximately 1/4 of the wavelength of the tertiary higher harmonic, the drain terminal of FETs leading to the output circuit being connected to one end of the parallel resonance circuit through the first connection line, an open point being formed at one end of the parallel resonance circuit, the other end of the parallel resonance circuit for the secondary higher harmonic being connected to the open-end line having a length corresponding to approximately 1/4 of the wavelength of the tertiary higher harmonic through the second connection line, the length and width of the first connection line being adjusted to determine the secondary-higher-harmonic load-reflection coefficient of the FETs as seen from the drain thereof to such a value as will maximize the efficiency of the amplifier, the length and width of the second connection line being appropriately adjusted so as to adjust the impedance matching conditions with respect to the fundamental wave.
摘要:
A high frequency amplifier circuit comprises an amplitude characteristic correction circuit and a phase characteristic correction circuit for compensating the non-linearity of the input-output characteristics of the amplifier. The amplitude characteristic correction circuit varies the drain voltage or the collector voltage of the amplifier in accordance with the envelope level of an input signal in such a manner that the relationship between the amplitude of the output of the amplifier and the amplitude of the input signal has linearity. On the other hand, the phase characteristic correction circuit provides a quantity of phase shift to the input signal in accordance with the envelope level of the input signal, and the phase-shifted input signal is applied to the amplifier in such a manner that the phase of the output of the amplifier and that of the input signal coincide with each other.
摘要:
The present invention provides a bridged stream corona generator including a first electrode comprising an electrical conductor having projections on its surface; a second electrode again comprising an electrical conductor, which is located in opposition to the first electrode; insulator means applied on at least the side of the second electrode in opposition to the first electrode; a high voltage power source connected to the first and second electrodes; and means for feeding a viscous oil onto the side of the insulator means which directs to the first electrode. With this arrangement, it is possible to smooth out irregularities caused by deposits on the side of the insulator means which faces the first electrode, thereby contributing to maintaining bridged stream corona discharge in a stable manner. The present corona generator lends itself well to purifying exhaust fumes from automobiles by corona discharge.
摘要:
A steering behavior dependent control system for controlling vehicular driving characteristics performs one or more control operations, such as anti-rolling suspension control, power assist control in a power steering system, rear wheel steering angle control in a four wheel steering system and so forth. The control system includes a steering angle sensor for monitoring steering angular displacement and produces a steering angle indicative signal. The control system is also provided a steering neutral position detector which detects steering at approximately a neutral position to produce an assumed steering neutral position indicative signal. A center value of a steering neutral range is projected on the basis of the steering angle indicative signal and the assumed steering neutral position indicative signal. Steering angle dependent control is thus performed by comparing the steering angle indicative signal value with the aforementioned center value to derive a magnitude of steering angular displacement. The control system further monitors an operating condition of the steering neutral position detector to detect a faulty condition thereof. When failure of the steering neutral position detector is detected, predetermined fail-safe operation takes place. In the fail-safe operation, the assumed center value of the steering neutral range is derived without utilizing the assumed steering neutral position indicative signal.
摘要:
A torque and index detection apparatus includes a torque sensing section that senses torque exerted on a connecting shaft connecting a first and second shafts by a pair of magnetic sensing elements whose magnetic sensing directions are opposite, and a reference rotational position sensing section that senses a reference rotational position of the second shaft by the magnetic sensing elements. The reference rotational position sensing section includes a pair of magnets provided in the circumferential direction of the second shaft with like magnetic poles facing each other, a first magnetic part that is located between the magnets and the magnetic sensing elements, rotates integrally with the second shaft, and forms a magnetic path for magnetic flux of the magnets in the reference rotational position, and a second magnetic part that is provided between the magnetic sensing elements, and passes the magnetic flux from the first magnetic part uniformly to the magnetic sensing elements.
摘要:
It is possible to definitely identify a relative position of a moving subject in an infrared image captured by an infrared camera in a relation with the background of the moving subject. The present invention provides an imaging device including an infrared camera for imaging an area under surveillance by infrared radiation measurement, a moving-subject detector for detecting a moving subject in the surveillance area on the basis of an infrared image signal acquired by the infrared camera, an image signal processor for coloring a moving part of the infrared image signal, detected by the moving-subject detector, with a predetermined color, and an image display for displaying an image resulted from the coloring of the moving part of the infrared image signal by the image signal processor.
摘要:
A magnetostrictive torque sensor having: a rotating shaft to rotate around a center axis, the rotating shaft having magnetostrictive characteristics; and a cylindrical magnetic core disposed at a predetermined distance on an outer periphery of the rotating shaft, the cylindrical magnetic core having a detection coil disposed on an inner periphery thereof to detect a torque applied to the rotating shaft. The detection coil is formed with a coil assembly to form a bridged circuit, and the coil assembly is formed with a flexible substrate coil disposed on a whole inner periphery of the magnetic core.
摘要:
A specific object such as a human body can be visualized in a wide range in a relation to its background night and day to definitely identify a location of the object in relation to the background as well in the infrared image captured by the infrared camera. The present invention provides an imaging device including a color camera unit for making color imaging with the imaging direction being sequentially adjusted for each of unit images forming together a panoramic image, an infrared camera for imaging by infrared radiation measurement with the imaging direction being sequentially adjusted for each of unit images forming together a panoramic infrared image, a server for storing/managing a panoramic color image produced by overlaying a plurality of unit images captured in colors by the color camera unit one on the other and a panoramic infrared image produced by overlaying a plurality of unit images captured by infrared radiation measurement by the infrared camera one on the other, an image synthesizer for overlaying, on an image of an object imaged by controlling the direction of imaging by the infrared camera to a desired one in a range of the imaging, a color image corresponding to a location, where the object has been imaged by the infrared camera, in a panoramic color image stored/managed in the server, and an image display for displaying an image produced by the overlaying by the image synthesizer.
摘要:
An inter-stage matching circuit 26 comprises a one-stage high pass filter type matching unit 28 and a one-stage low pass filter type matching unit 29 serially connected with each other.
摘要:
A feedforward amplifier combines an input signal combined by a first error rejection loop with an error component and a first pilot signal detected by a second error detection loop, thereby canceling out the error component and the first pilot signal residual in the input signal.