摘要:
A parabolic-reflector antenna having a primary horn including first, second, and third hollow portions. The first hollow portion has an elliptical aperture on one end thereof and a circular cross section on an opposite end thereof, and is progressively tapered away from the elliptical aperture. The second hollow portion has a circular cross section and a constant diameter, and is joined to the opposite end of the first hollow portion. The third hollow portion has a circular cross section on one end thereof and a circular cross section on an opposite end thereof. The third hollow portion is joined to the opposite end of the second hollow portion, and is progressively tapered away from the second hollow portion. The parabolic-reflector antenna also includes a parabolic reflector having an elliptical aperture whose major axis is perpendicular to the major axis of the elliptical aperture of the primary horn.
摘要:
A laser sputtering apparatus has a vacuum chamber, a target holder installed in the vacuum chamber, arranged to oppose the target in the vacuum chamber, a substrate mounted on the substrate support, and a laser beam source which emits laser beams onto the target through a window provided in the vacuum chamber wall, providing a laser sputtering apparatus that supplies dielectric thin films with a high permittivity and a high withstanding voltage.
摘要:
A synthetic resin pallet is provided with at least one slip preventing member on the upper and or lower surfaces of the deck board. The slip preventing member is made of relatively soft and flexible material, preferably a polyolefin resin.
摘要:
A satellite receiver includes a control unit adapted to output to an antenna control signals for time-sequentially switching between a plurality of different satellite broadcast signals, a channel selecting unit adapted to select a transponder including a specific program from each of a plurality of broadcast signals input from the antenna, and a demultiplexer adapted to extract specific program data from each of the plurality of transponders selected by the channel selecting unit.
摘要:
A receiver and a transmitter-receiver, such as a mobile telephone unit and a transceiver, capable of controlling a supplied power to a receiving unit including a variable gain amplifier with high precision. The receiver employs a configuration including, for example, a receiving unit, a gain control signal-generating unit that designates a gain value of variable gain amplifiers in the receiving unit, a control unit, and a memory. The memory stores supplied power values to the receiving unit that are associated with gain values, and the control unit controls an electric power to be supplied to the receiving unit by referencing the supplied power values stored in the memory based on a gain value designated by a gain control signal.
摘要:
A divider circuit including a plurality of latch circuits which are connected in series such that each of the latch circuits is responsive to a control signal to latch data which is output from a preceding latch circuit in the series, and a logic circuit which receives the data output from the plurality of latch circuits and which outputs a logic operation result to a first latch circuit in the series of the plurality of latch circuits.
摘要:
A filter circuit having an input resistance portion including a first transconductor having a positive input port impressed with a first voltage, a negative input port impressed with a second voltage, a positive output port and a negative output port; a second transconductor having a positive input port impressed with the second voltage, a negative input port impressed with a third voltage, a positive output port and a negative output port; and a third transconductor having a positive input port coupled to the positive output ports of the first and second transconductors and the negative output port of the third transconductor, a negative input port coupled to the negative output ports of the first and second transconductors and the positive output port of the third transconductor, a positive output port and a negative output port.
摘要:
The present invention provides a simple smaller-sized elastic integrated circuit having a lower power, to which data synchronized with a first clock is input and which outputs data synchronized with a second clock. The elastic integrated circuit includes a read address counter which operates with an internal clock to output a read address count value; a delay circuit to which the read address count value is input and which delays and outputs the read address count value by a predetermined time period; a write address counter which operates using the read address count value output from the delay circuit with a clock externally input so as to output a write address count value; and a memory circuit which writes data input thereto by the write address count value and reads data written therein by the read address count value.
摘要:
The microwave plasma torch of the invention includes: a vacuum container having an evacuating apparatus; a coaxial waveguide including an inner conductor and an outer conductor, a first end portion of the coaxial waveguide being connected with a microwave supplying apparatus for supplying a microwave and a second end portion of the coaxial waveguide being connected with the vacuum container, thereby introducing the microwave supplied from the microwave supplying apparatus into the vacuum container along a waveguide axis of the coaxial waveguide; and a gas supplying apparatus for injecting a gas into the vacuum container along a plurality of injection axes. In the microwave plasma torch, at least two of the plurality of injection axes do not cross the waveguide axis in the second end portion, and do not exist in a plane vertical to the waveguide axis, and a ratio of a diameter of the inner conductor to a diameter of the outer conductor in a vicinity of the second end portion decreases from the first to the second end portion along the waveguide axis.
摘要:
In an excitation atomic beam source for use in doping impurities to a semiconductor, a magnetic field is generated in a space between a nozzle (12) and a skimmer (13). A microwave discharge is generated in the space to form a plasma in the space by applying microwaves to a gas to be ionized emitted from the nozzle (12). In this manner, high-velocity particles and excited atoms in the plasma are passed through the skimmer (13) to thereby generate a supersonic excitation atomic beam.