Abstract: An electric lock device including a movable member, a cam plate (5) rotated in an unlocking direction and a locking direction by the driving of a drive source, and a lock member (8) including a cam contact surface (10) in contact with a sliding surface (6) of the cam plate (5). The lock member (8) follows the sliding surface (6) to be displaced between a locking position for inhibiting the movement of the movable member and an unlocking position for allowing the movement of the movable member. The cam profile of the sliding surface (6) is set so that the rotary torque of the cam plate (5) necessary for moving the lock member (8) from the locking position to the unlocking position can be maintained at approximately a constant value.

Abstract: A method of forming a dielectric resonator from an inner-conductor-formed hole that has a substantially rectangular or substantially elliptical cross section in a direction perpendicular to the depth direction thereof, by placing a rotary cutting disk in contact with the edge of the opening of the inner-conductor-formed hole, and removing portions of an outer conductor and the inner conductor in the contact portion with the rotary cutting disk, thereby separating the inner conductor and the outer conductor.

Abstract: An OFDM demodulator includes an FFT circuit, a phase correction circuit, and a timing synchronization circuit. The timing synchronization circuit includes a symbol-boundary calculation circuit to estimate a symbol-boundary position Nx by filtering the correlation peak of a guard interval, symbol-boundary correction circuit to calculate a clock-phase error based on the symbol-boundary position Nx, and a start-flag generation circuit to generate a start flag for the FFT calculation. The symbol-boundary correction circuit subtracts only a value whose precision is smaller than the cycle of a reference clock from the symbol-boundary position Nx, and generates a phase correction signal for each sub-carrier based on the value. The phase correction circuit performs a complex multiplication of the FFF-calculated signal by the phase correction signal to correct the clock-phase error.

Abstract: A Doppler frequency calculating apparatus that calculates a Doppler frequency, which is the magnitude of a time-dependent fluctuation of a characteristic of the transmission path through which an orthogonal frequency-division multiplexing (OFDM) signal is transmitted, includes a received signal point memory operable to store a received signal point of a sub-carrier having a reference carrier signal of the OFDM signal, a modulated component eliminating section operable to eliminate a modulated component from the received signal point stored in the received signal point memory, and a Doppler frequency calculating section operable to calculate a Doppler frequency by performing frequency analysis on the received signal point of each sub-carrier from which the modulated component has been eliminated by the modulated component eliminating section.

Abstract: A transmission apparatus which prevents adversely affects from an adjacent channel even without provision of a guard band. An information sequence 1 input to a mapping unit 21-1 of the transmission apparatus is mapped onto predetermined signal points by QAM modulation, etc. and output to a frequency converter 22-1. The frequency converter 22-1 converts the frequency according to a center frequency of an input signal and outputs the result to a multiplexer 23. The other data series are processed in the same way as the data series 1 are output to the multiplexer 23. The multiplexer 23 multiplexes a plurality of input signals, while an IFFT processor 24 performs an inverse Fourier transform on the multiplexed signals all at once. The inverse Fourier transformed signal is quadrature-modulated by a quadrature modulator 26, converted to the RF band signal by the frequency converter 28, and transmitted from an antenna 30.

Abstract: Influence from an adjacent signal is prevented even if a guard band is not provided. A phase comparison unit 21 compares a reference window signal input to a PLL circuit 4 and a window signal supplied from a frequency division circuit 22 and outputs the comparison result to an LPF 23. The LPF 23 extracts a low frequency component from the input signal and outputs the same to a voltage controlled oscillator 24. The signal output from the voltage controlled oscillator 24 is supplied as a clock to units of an OFDM modulation circuit 2 and, at the same time, supplied to the frequency division circuit 22. The frequency division circuit 22 divides the frequency of the supplied signal to thereby generate a new window signal and supplies the same to an IFFT unit 13. Further, the generated window signal is supplied to a PLL circuit 5. The PLL circuit 5 generates a clock for controlling a frequency modulation circuit 3 based on the supplied window signal.

Abstract: The present invention provides a reception terminal apparatus that can receive signals in a stable state with a simple configuration and hence is highly suitable for mobile reception. The reception terminal apparatus includes an input section that selectively inputs a reception signal from reception signals of a plurality of types in different states of reception, a demodulation section that demodulates the reception signal input by the input section, an error detection section that detects errors in the stream data obtained by the demodulation section by demodulating the reception signal, and a control section that determines if the number of errors as detected by the error detection section exceeds a threshold value or not and controls the input section according to the outcome of determination, the reception signal to be input to the demodulation section by the input section being switched when the number of errors exceeds the threshold value.

Abstract: The time required for switch the channel can be remarkably curtailed. When broadcasting signals through a plurality of information channels with an OFDM system, the plurality of information channels are multiplexed in the sense of frequency and collectively subjected to IFFT modulation for connected transmission instead of subjecting the plurality of information channels independently to OFDM modulation for transmission. With this arrangement, the efficiency of exploitation of frequencies is improved. According to the invention, the OFDM frames are synchronized for each information channel for the purpose of connected transmission. Then, the OFDM receiver can switch the information channel for signal reception, maintaining the frame synchronizing signals.

Abstract: An optical module includes a package; an optical device housed in the package, and having a temperature-dependent characteristic; a thermo-module connected to the optical device to control its temperature and configured to heat or cool the optical device when supplied with a first electric current in one direction or a second electric current in a direction opposite to the first electric current, respectively; and a heating element disposed close to the optical device and configured to heat the optical device when supplied with an electric current.

Abstract: In a dielectric filter, from the top surface to the bottom surface of a substantially rectangular dielectric block, inner-conductor holes are formed. On the inner surfaces of the inner-conductor holes, inner conductors are formed except where non-conductor portions are formed in proximity to one of the top and bottom surfaces, in which the apertures of the inner-conductor holes are formed. On the outer surface of the dielectric block, an outer conductor is formed substantially over the entire outer surface, and input and output electrodes isolated from the outer conductor are coupled with the non-conductor portions in the respective inner-conductor holes at the ends of the dielectric block in the direction of array of the inner-conductor holes.

Abstract: A transmission apparatus which prevents adversely affects from an adjacent channel even without provision of a guard band. An information sequence 1 input to a mapping unit 21-1 of the transmission apparatus is mapped onto predetermined signal points by QAM modulation, etc. and output to a frequency converter 22-1. The frequency converter 22-1 converts the frequency according to a center frequency of an input signal and outputs the result to a multiplexer 23. The other data series are processed in the same way as the data series 1 are output to the multiplexer 23. The multiplexer 23 multiplexes a plurality of input signals, while an IFFT processor 24 performs an inverse Fourier transform on the multiplexed signals all at once. The inverse Fourier transformed signal is quadrature-modulated by a quadrature modulator 26, converted to the RF band signal by the frequency converter 28, and transmitted from an antenna 30.

Abstract: A transmission apparatus which prevents adversely affects from an adjacent channel even without provision of a guard band. An information sequence 1 input to a mapping unit 21-1 of the transmission apparatus is mapped onto predetermined signal points by QAM modulation, etc. and output to a frequency converter 22-1. The frequency converter 22-1 converts the frequency according to a center frequency of an input signal and outputs the result to a multiplexer 23. The other data series are processed in the same way as the data series 1 are output to the multiplexer 23. The multiplexer 23 multiplexes a plurality of input signals, while an IFFT processor 24 performs an inverse Fourier transform on the multiplexed signals all at once. The inverse Fourier transformed signal is quadrature-modulated by a quadrature modulator 26, converted to the RF band signal by the frequency converter 28, and transmitted from an antenna 30.

Abstract: An electric steering lock apparatus includes a cam plate rotated in an unlocking direction and a locking direction by driving a motor unit, and a lock shaft shifting between a lock position at which the rotation of the steering shaft is prevented and an unlock position at which the rotation of the steering shaft is permitted, following to the sliding surface of the cam plate, wherein, at the position of the cam plate at which the lock shaft is located at the unlock position, the center of rotation of the cam plate is set at an eccentric position with respect to the position of the center of gravity of the cam plate so that the rotation torque resulting from the own weight of the cam plate acts in the unlocking direction.

Abstract: A frequency interleaving circuit frequency-interleaves main signals generated according to sound data by parameters set according to frequencies of transmission channels. A sub-signal generating circuit generates sub-signals for transmission control including pilot signals. Mapping circuits modulate the sub-signals by using pseudo-random sequences generated based on initial values of random codes set according to frequencies of transmission channels. The frequency-interleaved main signals and the sub-signals modulated by the mapping circuits are OFDM-modulated. Then, they are converted to the frequencies of the transmission channels. An increase of a dynamic range of transmission signals can be suppressed by controlling the initial values of random codes set.

Abstract: Particularly in the recovery and reuse of unreacted serine after the synthesis of phosphatidylserine by the transfer reaction of a phosphatidyl group with phospholipase D, a simple process for recovering serine in which a material inhibitory to the synthesis of phosphatidylserine can be efficiently removed is provided. The present invention provides the following processes for recovering serine. A process for recovering unreacted serine from a reaction system after the synthesis of phosphatidylserine by the transfer reaction of a phosphatidyl group with phospholipase D, comprising adding a polar organic solvent or a mixture of a polar organic solvent and water to the unreacted serine containing water-soluble fraction in which the phosphatidylserine has been removed from a reaction mixture in the reaction system and washing the fraction with the added solvent or the mixture of the solvent and water to obtain the serine.

Abstract: A reception apparatus for OFDM signals having a short initial rise time since start of reception until outputting the sound and/or a picture. An OFDM reception apparatus 1 of the ISDB-T standard presets the TMCC information at the outset in a memory 19 in association with each broadcasting station. This TMCC information contains the information on the RF frequency and the guard interval length, time interleaving pattern information, the information on the carrier modulation scheme and the information on the code rate of the convolutional code. When a user selects a broadcasting station, a control circuit 18 reads out the TMCC information associated with the broadcasting station from the memory 19. The control circuit 18 affords the read-out TMCC information to each circuit to set e.g., the guard interval or the carrier modulation scheme.

Abstract: The time required for switch the channel can be remarkably curtailed. When broadcasting signals through a plurality of information channels with an OFDM system, the plurality of information channels are multiplexed in the sense of frequency and collectively subjected to IFFT modulation for connected transmission instead of subjecting the plurality of information channels independently to OFDM modulation for transmission. With this arrangement, the efficiency of exploitation of frequencies is improved. According to the invention, the OFDM frames are synchronized for each information channel for the purpose of connected transmission. Then, the OFDM receiver can switch the information channel for signal reception, maintaining the frame synchronizing signals.

Abstract: An OFDM demodulator includes an FFT circuit, a phase correction circuit, and a timing synchronization circuit. The timing synchronization circuit includes a symbol-boundary calculation circuit to estimate a symbol-boundary position Nx by filtering the correlation peak of a guard interval, symbol-boundary correction circuit to calculate a clock-phase error based on the symbol-boundary position Nx, and a start-flag generation circuit to generate a start flag for the FFT calculation. The symbol-boundary correction circuit subtracts only a value whose precision is smaller than the cycle of a reference clock from the symbol-boundary position Nx, and generates a phase correction signal for each sub-carrier based on the value. The phase correction circuit performs a complex multiplication of the FFF-calculated signal by the phase correction signal to correct the clock-phase error.

Abstract: An OFDM demodulation (1) is provided which includes a guard correlation/peak time detection circuit (12) to generate a peak timing Np of a guard interval correlation value, and a timing synchronization circuit (13) to estimate a symbol-boundary time Nx from the peak timing Np. The timing synchronization circuit (13) calculates the symbol-boundary time Nx by filtering the peak time Np by a DLL (delay locked loop) filter (43). Further, the DLL filter (43) includes a limiter (52) to limit the range of phase-error component and an asymmetric gain circuit (53) to change the magnitude of the gain correspondingly to the polarity of the phase error to prevent the timing from being pulled out due to a fading or multipath.

Abstract: A semiconductor device package is comprised of a metal base for receiving a semiconductor device, a metal frame joined at its lower face to the metal base, a seal ring joined at its lower face to an upper face of the metal frame, and a metal lid joined to an upper face of the seal ring. The upper face of the seal ring is formed, at its at least two sides facing each other, into a concavely warped shape as viewed in vertical cross section, and the maximum warpage of the upper face of the seal ring is not more than 0.2% of the length of the side of the upper face.