Patent application number | Description | Published |
20080290969 | Piezoelectric Resonator, Piezoelectric Filter, and Duplexer and Communication Device Using the Same - Three or more piezoelectric resonators having resonance frequencies different from one another are realized on the same substrate. First through third frequency adjustment layers | 11-27-2008 |
20090014295 | ELECTROMECHANICAL SWITCH, FILTER USING THE SAME, AND COMMUNICATION APPARATUS - An electromechanical switch includes a first beam, a second beam arranged in parallel with the first beam and connected to the first beam through a connecting portion, a first electrode formed so as to have a first gap with respect to the first beam, a voltage applying portion which applies a voltage between the first beam and the first electrode, and a second electrode formed so as to have a second gap with respect to the second beam. The second gap is greater than the first gap. The first beam is displaced when the voltage applying portion applies the voltage between the first beam and the first electrode, so that switching between the second beam and the second electrode is performed in a state that the first beam is not electrically connected to the first electrode. | 01-15-2009 |
20090102319 | ACOUSTIC RESONATOR AND FILTER - A first supporting section | 04-23-2009 |
20090121809 | Thin Film Elastic Wave Resonator - An upper electrode ( | 05-14-2009 |
20090133237 | PIEZOELECTRIC DEVICE AND METHOD OF MANUFACTURING PIEZOELECTRIC RESONATORS - A piezoelectric resonator comprises a piezoelectric material layer | 05-28-2009 |
20090273416 | FREQUENCY-VARIABLE ACOUSTIC THIN FILM RESONATOR, FILTER AND COMMUNICATION APPARATUS USING THE SAME - An acoustic thin film resonator including: a first piezoelectric thin film | 11-05-2009 |
20090277762 | MICROMACHINE SWITCH, FILTER CIRCUIT, DUPLEXER CIRCUIT, AND COMMUNICATION DEVICE - A micromachine switch of the present invention is a micromachine switch for switching an electrical connection between signal electrodes in accordance with control signals from outside which include: a first control signal for electrically connecting the signal electrodes between which a signal is to be passed; and a second control signal for disconnecting the electrical connection between the signal electrodes. The micromachine switch comprises: a substrate; a rotating body provided on the substrate, which is rotatable on the substrate; a movable electrode provided on the rotating body; a first signal electrode, one end of which is electrically connected to one end of the movable electrode, and another end of which is provided on the substrate; a second signal electrode which is provided near the rotating body so as to be positioned such that a rotation of the rotating body causes the second signal electrode to be electrically connected to another end of the movable electrode; and a drive section for causing, in accordance with the first control signal, the rotating body to rotate until the rotating body is in such a position as to allow said another end of the movable electrode and the second signal electrode to be electrically connected, and for causing, in accordance with the second control signal, the rotating body to rotate until the rotating body is in such a position as to disconnect an electrical connection between said another end of the movable electrode and the second signal electrode. | 11-12-2009 |
20090315643 | FILTER DEVICE - A high frequency filter includes an inductor, a serial resonance circuit including an inductor and capacitors, a serial resonance circuit including an inductor and capacitors, and a varactor diode connected between a connection point between the capacitor and the capacitor and a connection point between the capacitor and the capacitor. A controller simultaneously changes two attenuation pole frequencies of the filter device by changing a capacitance of the varactor diode. | 12-24-2009 |
20100052476 | PIEZOELECTRIC FILTER AND METHOD FOR MANUFACTURING THE SAME - A piezoelectric filter of the present invention is provided with first and second piezoelectric vibrators, each having a substrate, a lower load film formed on the substrate, a lower electrode formed on the lower load film, a piezoelectric element formed on the lower electrode, an upper electrode formed on the piezoelectric element and an upper load film formed on the upper electrode, and the piezoelectric filter is configured by electrically connecting the first and second piezoelectric vibrators to each other, and the piezoelectric element of the first piezoelectric vibrator and the piezoelectric element of the second piezoelectric vibrator correspond to respectively different areas of the same piezoelectric element; thus, the resonance frequencies of the first and second piezoelectric vibrators are adjusted by the respective lower load films and upper load films of the first piezoelectric vibrator and the second piezoelectric vibrator so that the resonance frequencies of the first and second piezoelectric vibrators are made different from each other. | 03-04-2010 |
20100291946 | HIGH-FREQUENCY FILTER - A digital television broadcast receiving section ( | 11-18-2010 |
20110109195 | VIBRATION POWER GENERATOR, VIBRATION POWER GENERATING DEVICE AND COMMUNICATION DEVICE HAVING VIBRATION POWER GENERATING DEVICE MOUNTED THEREON - Generating efficiency of a vibration power generating device, which generates power by vibration in the biaxial direction, is improved. The vibration power generating device is provided with: a first substrate ( | 05-12-2011 |
20110227545 | VIBRATION POWER GENERATOR, VIBRATION POWER GENERATING DEVICE AND COMMUNICATION DEVICE HAVING VIBRATION POWER GENERATING DEVICE MOUNTED THEREON - Electricity generated by a vibration power generator | 09-22-2011 |
20110260699 | ELECTRET ELECTRODE, ACTUATOR USING THE SAME, VIBRATION POWER GENERATOR, VIBRATION POWER GENERATING DEVICE, AND COMMUNICATION DEVICE USING THE VIBRATION POWER GENERATING DEVICE - An object of the present invention is to provide an electret electrode having an improved surface charge density. | 10-27-2011 |
20110316384 | VIBRATION POWER GENERATOR, VIBRATION POWER GENERATION DEVICE, AND ELECTRONIC DEVICE AND COMMUNICATION DEVICE HAVING VIBERATION POWER GENERATION DEVICE INSTALLED - The present invention provides a vibration power generator that does not require a complicated structure and process and improves mechanical reliability, and copes with frequency reduction, a vibration power generating device, and an electronic device and a communication device that have the vibration power generating device mounted thereon. | 12-29-2011 |
20120075030 | MEMS ELEMENT, AND MANUFACTURING METHOD OF MEMS ELEMENT - In a MEMS device having a substrate | 03-29-2012 |
20120091547 | RESONATOR AND PRODUCTION METHOD THEREOF - A resonator using the MEMS technology is provided which improves the accuracy of a shape of electrodes so as avoid a short circuit that would otherwise be caused between input and output electrodes to thereby increase the reliability thereof. A resonator includes a substrate | 04-19-2012 |
20120182077 | OSCILLATOR - A MEMS oscillator including: an oscillator unit being capable of outputting an output from an amplifier as an original oscillator signal that includes a feedback type oscillator circuit including a MEMS resonator and an amplifier, and an automatic gain controller receiving the output from the amplifier and controlling a gain of the amplifier based on a level of the output to maintain a level of the output from the amplifier constant; and a corrector unit that receives the original oscillator signal, that generates from the original oscillator signal a signal of a predetermined set frequency, and that outputs the generated signal of the predetermined set frequency as an output signal. The corrector unit receives, separately from the original oscillator signal, an information signal that includes a signal having a correspondence relationship between a gain at a resonance frequency of the MEMS resonator from the oscillator unit, corrects a frequency of the original oscillator signal based on the information signal to generate the signal of the predetermined set frequency, and outputs the generated signal of the predetermined set frequency as the output signal. | 07-19-2012 |
20120306313 | VIBRATION POWER GENERATOR, VIBRATION POWER GENERATING DEVICE, AND ELECTRONIC DEVICE AND COMMUNICATION DEVICE HAVING VIBRATION POWER GENERATING DEVICE MOUNTED THEREON - An object of the present invention is to provide a vibration power generator in which the wiring from the movably held substrate can be omitted or simplified. A vibration power generator includes a first substrate, a first electrode which is disposed on a lower surface of the first substrate and includes a film retaining electric charges, a second substrate which is disposed away from the first substrate and opposed to the lower surface of the first substrate, a second electrode disposed on an upper surface of the second substrate so as to be opposed to the first electrode, third electrode which is disposed on the upper surface of the first substrate and includes a film retaining the electric charges, a third substrate which is disposed away from the first substrate and opposed to the upper surface of the first substrate, and a fourth electrode which is disposed on a lower surface of the third substrate so as to be opposed to the third electrodes, wherein the film retaining the electric charges of the first electrodes retains electric charges has a polarity different from a polarity of the film retaining the electric charges of the third electrode, the vibration power generator further includes a restoring force generation member for giving a restoring force, in which the first substrate is held at a predetermined position when an external force is not exerted to the first substrate, and the first substrate is restored to the predetermined position when the external force is exerted to the first substrate and thus the first substrate moves with respect to the second substrate. | 12-06-2012 |
20130099626 | VIBRATION POWER GENERATOR, VIBRATION POWER GENERATION APPARATUS, AND ELECTRIC DEVICE AND COMMUNICATION DEVICE WITH VIBRATION POWER GENERATION APPARATUS MOUNTED THEREON - A power generator comprises a first substrate | 04-25-2013 |
20130147567 | OSCILLATOR - A MEMS oscillator having a feedback-type oscillation circuit including a MEMS resonator and an amplifier, a voltage control unit operable to control a bias voltage applied to an oscillating member of the MEMS resonator, and an auto gain control unit which receives an output from the amplifier and, based on a level of the output, to output an amplitude control signal for controlling a gain of the amplifier to the amplifier such that the level of the output from the amplifier comes to be a predetermined level, wherein the voltage control unit controls the bias voltage applied to the oscillating member based on an operating temperature of the MEMS resonator such that a peak gain of the MEMS resonator comes to have a predetermined value regardless of the operating temperature, and the voltage control unit derives the operating temperature of the MEMS resonator by monitoring the amplitude control signal. | 06-13-2013 |
20130221799 | VIBRATION GENERATOR, VIBRATION GENERATION DEVICE, AND ELECTRONIC EQUIPMENT AND COMMUNICATION DEVICE PROVIDED WITH VIBRATION GENERATION DEVICE - A vibration power generator including a first substrate; first electrodes disposed over one surface of the first substrate; a second substrate spaced from the first substrate and opposed to the one surface of the first substrate; and second electrodes disposed over one surface of the second substrate so as to be opposed to the first electrodes, wherein one of the first and second electrodes includes a film holding a charge; one of the first and second substrates is a vibratory substrate; and an overlapped area between the first and second electrodes becomes minimum and then maximum, or becomes maximum and minimum, and an electrostatic capacity Cp formed between the first and second electrodes when the overlapped area becomes maximum changes, and the change of Cp comprises an increase of Cp, while the vibratory substrate is displaced from the vibration center to the vibration end. | 08-29-2013 |
20140055002 | VIBRATION POWER GENERATOR, ROTATING BODY AND COMMUNICATION DEVICE - A vibration power generator | 02-27-2014 |
20140056043 | POWER GENERATOR, AND ELECTRIC EQUIPMENT USING IT - A power generator includes a power generating device that generates a power by receiving vibration, and a power converter that converts the output of the power generating device. The power generating device outputs powers through a first system and a second system. The power converter is driven by receiving the output of the second system from the power generating device, and converts the output of the first system from the power generating device into another power. | 02-27-2014 |
20140070664 | VIBRATION POWER GENERATOR - There is provided a vibration power generator for converting vibration energy into electric power. The vibration power generator includes a fixed substrate, and a vibrator capable of vibrating with respect to the fixed substrate. Fixed electrode pieces are disposed on the fixed substrate, and electret electrode pieces opposed to the fixed electrode pieces are disposed on the vibrator. The vibration power generator is adapted to generate electricity, through changes in capacitances between the fixed electrode pieces and the electret electrode pieces, due to the vibration of the vibrator. The electret electrode pieces have opposite end portions in the vibration direction which have a higher average electric-charge density per unit area than that of middle portions, in the vibration direction, of the electret electrode pieces. | 03-13-2014 |
20140077657 | VIBRATION POWER GENERATOR AND VIBRATION POWER GENERATION DEVICE, AND COMMUNICATION DEVICE AND ELECTRONIC EQUIPMENT WITH VIBRATION POWER GENERATION DEVICE - A vibration power generator is provided that increases output power by improving the electrostatic capacitance when the area of the overlap between electret electrodes and counter electrodes is maximum while having the function of limiting the spread of the electric field from the electret electrodes. The vibration power generator is provided with: a first substrate and a second substrate configured so as to be relatively movable while keeping a condition of being separated so as to be opposed to each other; a first electrode formed on the first substrate; a second electrode formed on the second substrate so as to be opposed to the first electrode; and a third electrode formed in a region different from the first electrode on the first substrate, either one of the first electrode and the second electrode includes a film holding a charge, and when an overlap between the first electrode and the second electrode is minimum, the third electrode is grounded, and when the overlap between the first electrode and the second electrode is maximum, the third electrode is open. | 03-20-2014 |
20140111061 | VIBRATION POWER GENERATOR - A vibration power generator comprises: a fixed substrate; a vibrating body having a surface opposed to the fixed substrate, the vibrating body being vibratable to the fixed substrate; electret electrodes aligned in a vibration direction on one of the surface of the fixed substrate and the surface of the vibrating body; and first fixed electrodes and second fixed electrodes alternately aligned in the vibration direction on the other thereof, wherein when the vibrating body is at a resting position, each of the electret electrodes overlaps with both electrodes of a corresponding fixed electrode pair, the corresponding fixed electrode pair being one of the first fixed electrodes and one of the second fixed electrodes that are opposed to the electret electrode, and when the vibrating body is not at a resting position, each of the electret electrodes always overlaps with at least one electrode of the corresponding fixed electrode pair. | 04-24-2014 |
20140339954 | VIBRATION POWER GENERATOR - A vibration power generator includes: a fixed substrate; a first fixed electrode piece disposed on the fixed substrate, the first fixed electrode piece having a first width of 2w; a second fixed electrode piece disposed on the fixed substrate, the second fixed electrode piece having a second width of 2w; a cover substrate disposed with a space g from the fixed substrate, the cover substrate being opposed to the fixed substrate; a vibrating body disposed between the fixed substrate and the cover substrate; and an electret electrode piece disposed on a side opposed to the first fixed electrode piece and the second fixed electrode piece of the vibrating body, the electret electrode piece having a width that is greater than 2w and less than or equal to 2w+s. | 11-20-2014 |
20140343797 | TIRE SENSING SYSTEM - Provided is a tire sensing system that reduces the power consumption, size, weight, and cost, while suppressing an increase in fuel consumption of moving means. The tire sensing system is adapted to monitor state of a tire or a road surface from vibration information to perform safety control of the moving means having the tire. The tire sensing system includes a sensor disposed in a position of an inner surface of the tire where the sensor can sense the vibration, a receiver for receiving the information sent from the sensor, and a control means for controlling the moving means on the basis of the information from the receiver. The state is estimated from first vibration applied to the sensor upon contact with the road surface via the tire, second vibration applied to the sensor upon departure from the road surface, and a contact time from the contact to the departure. | 11-20-2014 |