61results about How to "Suppresses frequency fluctuations" patented technology

A non-contact power transmission system comprises: a primary coil including a power supply coil and a magnetic resonance coil; and a secondary coil including a load coil, thereby transmitting an electric power from the power supply coil at a self-resonating frequency of the magnetic resonance coil, which is determined by a parasitic capacitance between wound wires of the coil and a self inductance of the coil, and taking out the electric power supplied, from the load coil of the secondary coil through magnetic coupling, with non-contact, wherein the electric power is transmitted, with non-contact, with applying magnetic coupling in coupling between the power supply coil and the magnetic resonance coil and coupling between the magnetic resonance coil and the load coil.

The present invention provides an acoustic wave device, which can inhibit the increment of electric resistance and the deterioration of frequency characteristics, and inhibit the deterioration of power resistance test characteristics even if the acoustic device is placed under a high temperature. The acoustic device includes a piezoelectric substrate (2) and an IDT electrode (3) formed thereon. The IDT electrode (3) is formed by laminated metallic membrances by a plurality of metallic membrances, wherein the laminating metallic membrances have a first metallic membrance (3b) formed by AI or AI-based alloy, a second metallic membrance (3e) formed by metal or alloy other than that used in the first metallic membrance, and a Cu membrance (3c) and a Ti membrance (3d) disposed between the first and second metal metallic membrances, wherein the Cu membrance (3c) within the Cu membrance (3c) and the Ti membrance (3d) is configured on the first metallic membrance (3b) side.

A SAW device has an IDT which is provided on the principal surface of a quartz crystal sustrate having Euler angles (−1.5°≦φ≦1.5°, 117°≦θ≦142°, ψ) and excites a SAW in a stopband upper end mode. Inter-electrode-finger grooves 8 are recessed between the electrode fingers of the IDT. When the Euler angle ψ is 42.79°≦|ψ|≦49.57°, the thickness H of the electrode fingers of the IDT is set to be within 0.055 μm≦H≦0.335 μm, preferably, 0.080 μm≦H≦0.335 μm. When the Euler angle ψ is |ψ|≠90°×n (where n=0, 1, 2, 3), and the thickness H of the electrode fingers is set to 0.05 μm≦H≦0.20 μm.

A SAW device has an IDT which is provided on the principal surface of a quartz crystal substrate having Euler angles (−1.5°≦φ≦1.5°, 117°≦θ≦142°, 42.79≦|ψ|≦49.57°) and excites a SAW in a stopband upper end mode, and a pair of reflectors which are arranged on both sides of the IDT. Inter-electrode-finger grooves are recessed between the electrode fingers of the IDT, and inter-conductor-strip grooves are recessed between the conductor strips of the reflectors. A first direction (X′ axis) perpendicular to the electrode fingers and the conductor strips intersects the electrical axis (X axis) of the quartz crystal substrate at an angle ψ. At least a part of the IDT and the reflectors are arranged in a second direction intersecting the first direction at an angle α of 1.0°≦α≦2.75°. An excellent frequency-temperature characteristic and a high Q value in an operation temperature range are realized simultaneously.

The invention provides an equal-phase multi-phase clock signal generating circuit. The purpose is to minimize the increase in the number of components, to suppress the increase in the area of ​​the semiconductor substrate-like circuit and the increase in power consumption, and to make the duty ratio of the output equal-phase multi-phase clock signal constant independently of the duty ratio of the input clock signal . In the equal-phase multi-phase clock signal generation circuit of the present invention, the input clock signal is converted into a complementary clock signal which has been divided by 2, and then input to a complementary voltage-controlled delay element column. Since the frequency of the input clock signal is divided by 2, the frequency-divided complementary clock signal becomes a clock signal having a constant duty ratio independent of the duty ratio of the input clock. By inputting the frequency-divided complementary clock signal to the voltage-controlled delay element column, and phase-comparing the complementary output signal from the voltage-controlled delay element column with the frequency-divided complementary clock signal, it is possible to output a signal synchronized with the above-mentioned input clock. Equiphase multiphase clock signal.

A SAW device includes an IDT which is provided on the principal surface of a quartz crystal substrate having Euler angles (−1.5°≦φ≦1.5°, 117°≦θ≦142°, |ψ|90°×n (where n=0, 1, 2, 3)) and excites a Rayleigh wave (wavelength: λ) in a stopband upper end mode. Inter-electrode-finger grooves are recessed between electrode fingers of the IDT. An IDT line occupancy η and an inter-electrode-finger groove depth G satisfy a predetermined relationship in terms of the wavelength λ, such that the SAW device has a frequency-temperature characteristic of a cubic curve having an inflection point between a maximum value and a minimum value in an operation temperature range. The inflection point is adjustable to a desired temperature or a desired temperature range depending on the IDT line occupancy η within an operation temperature range.

A storage battery system control method includes at least the following steps. Respective current SOC (state of charge) values of the large capacity storage battery system and the high power storage battery system are acquired. Electrical power, which is required to operate the frequency control service for the purpose of suppressing frequency fluctuations, to the large capacity storage battery system and the high power storage battery system, in accordance with the respective SOC values. The respectively allocated electrical power is charged or discharged by driving the large capacity storage battery system, or alternatively, the high power storage battery system, or alternatively, the large capacity storage battery system and the high power storage battery system.