摘要:
A pneumatic tire includes a carcass ply with carcass cords. The carcass cords comprise high tenacity vinylon fiber, polyethylene naphthalate fiber or polyalylate fiber. Viscoelasticity characteristics per one cord at 120° C. of the carcass cord satisfy the following equations (1) to (3): B>0 (1) B≦0.0000437×A+0.042857 (2) B≦−0.00003636×A+0.163636 (3) (wherein “A” represents a product of complex modulus E*(N/cm2) and cross-sectional area “S” (cm2) of cord), and “B” represents a loss tangent tanδ).
摘要:
A wiring board for mounting semiconductor device, includes at least a dielectric film 1; wirings formed in the dielectric film 1; a plurality of electrode pads provided at front and back surfaces of the dielectric film with their surfaces exposed and at least portions of lateral sides of them buried into the dielectric film; vias connecting the wirings and the electrode pads. At least one via connecting each other the wirings formed in the dielectric film includes second material different from first material forming the vias connecting the wirings and the electrode pads. The wiring board for mounting semiconductor device, is effective for an increase in terminals and finer pitch of terminal intervals due to an improvement in integration, performance or multi-function of semiconductor devices, can mount semiconductor devices especially on both sides of the board at a high density and high accuracy, and furthermore, is excellent in reliability as well.
摘要:
A capacitive load driving circuit includes an error amplification circuit that amplifies a difference between an external input signal provided to one input terminal and a negative feedback signal provided from the negative feedback circuit to another input terminal; a modulation circuit; a power switching circuit; a gate driving circuit; a low-pass filter connected to an output side of the power switching circuit and that removes switching carrier components included in an output signal of the power switching circuit; an output transformer that boosts an output signal of the low-pass filter and has a primary winding connected to an output terminal of the filter; a capacitive load that is connected in parallel with a secondary winding of the output transformer; and the negative feedback circuit performs a negative feedback from the output terminal of the low-pass filter to an input side of the error amplification circuit.
摘要:
An ultrasonic transducer includes: a fixed electrode having corrugations on the surface; a vibrating film having an electrode layer and disposed on the surface of the fixed electrode; and a holding member which holds the fixed electrode and the vibrating film. The ultrasonic transducer is driven by applying an AC signal between the electrode layer of the vibrating film and the fixed electrode, and generates a sound pressure of at least 120 dB within a frequency range from 20 kHz to 120 kHz.
摘要:
An ultrasonic transducer includes: a pair of fixed electrodes including a conductive member; a vibrating film having a conductive layer; and a member which holds the pair of fixed electrodes and the vibrating film. The vibrating film is formed of nonconductive bodies and has an electrode layer formed of a conductive material. The electrode layer is applied with a DC bias voltage of a single polarity by a DC bias supply, and is also applied with an AC signal output from a signal source superimposed on the DC bias voltage. The pair of fixed electrodes have a plurality of holes of the same number at positions facing each other via the vibrating film, and an AC signal is applied between the conductive members of the pair of fixed electrodes by the signal source.
摘要:
An electrostatic transducer includes: a class-D power amplifier that amplifies an input signal; and a low pass filter that has a plurality of pairs of inductors and capacitors, is connected to an output side of the class-D power amplifier, and serves to eliminate switching carrier components included in an output of the class-D power amplifier. An electrostatic load capacitor of the electrostatic transducer serving as a driving load is disposed at a capacitor, which is closest to the output side of the class-D power amplifier, of circuit elements forming the low pass filter, an electrostatic coupling capacitor and an output transformer are interposed between the electrostatic load capacitor of the electrostatic transducer and an inductor closest to the output side of the class-D power amplifier of the low pass filter, and a damping resistor is connected in series to a primary coil of the output transformer.
摘要:
A projector including an ultrasonic speaker that includes an ultrasonic transducer capable of oscillating an acoustic signal in a wide frequency band and reproduces signal sound in the audio frequency band, and a projector main body that includes a projecting optical system that projects a video image on a projecting surface. The ultrasonic speaker and the projector main body are integrated with each other.
摘要:
A low-power diversity receiver includes at least two receive paths, each of which is designated as a primary or secondary receive path. A primary receive path is compliant with system requirements (e.g., IS-98D requirements). A secondary receive path is not fully compliant with the system requirements and is designed for lower power, less area, and lower cost than the primary receive path. For a multi-antenna receiver, the two receive paths may be used to simultaneously process two received signals from two antennas. For a single-antenna receiver, either the primary or secondary receive path is selected, e.g., depending on whether or not large amplitude “jammers” are detected, to process a single input signal from one antenna. The receiver may include additional receive paths for additional frequency bands and/or GPS.
摘要:
A method for processing a stereo image is provided which includes the steps of setting a specified area of a base window with reference to a point for obtaining a corresponding point in the base image; setting a reference window having the same size as that of the base window in the reference image; evaluating the difference between the base window and the reference window while scanning the reference window along an epipolar line; determining the position of the reference window having the minimum difference as a stereo corresponding point; measuring parallax from the difference between the position of the base window and the position of the reference window; calculating the reliability of the corresponding point (parallax) by first reliability based on the sharpness of the peak of the evaluation-value distribution of the difference of patterns between the base window and the reference window and second reliability based on the shape of the peaks; and outputting the value of the reliability of the parallax together with information on the parallax.