Patent application number | Description | Published |
20100158157 | ASK DEMODULATOR, COMMUNICATION MODULE, COMMUNICATION DEVICE, AND ASK DEMODULATION METHOD - According to one embodiment, an ASK demodulator includes a rectifier, a first low-pass filter, a second low-pass filter, a comparator, and a threshold controller. The rectifier rectifies an ASK signal. The first low-pass filter outputs a signal corresponding to an envelope curve output from the rectifier. The second low-pass filter outputs an integrated signal of the signal output from the first low-pass filter. The comparator detects an output logic in accordance with comparison between the signal output from the first low-pass filter and a threshold obtained by adding a predetermined hysteresis width to the integrated signal output from the second low-pass filter. The threshold controller controls the threshold by setting the predetermined hysteresis width based on a direct current offset voltage caused by element dispersions of the comparator. | 06-24-2010 |
20100164564 | STARTING APPARATUS AND STARTING METHOD - A starting apparatus includes: a storage unit storing an identifier; a rectifying unit rectifying a reception signal; a generating unit comparing the reception signal rectified in the rectifying unit to a reference signal and generating a digital signal from the reception signal; a judging unit judging whether or not the digital signal contains information of the identifier; a reference changing unit changing the reference signal when the judging unit judges that the reception signal does not contain information of the identifier; and a start instructing unit instructing start of an electric appliance when the judging unit judges that the reception signal contains information of the identifier. | 07-01-2010 |
20100166197 | SOUND CORRECTOR, SOUND MEASUREMENT DEVICE, SOUND REPRODUCER, SOUND CORRECTION METHOD, AND SOUND MEASUREMENT METHOD - According to one embodiment, a sound corrector includes a signal outputter, a response signal, a frequency specifier, a coefficient specifier, a filter, and an outputter. The signal outputter outputs a measurement signal to measure acoustical properties of an object to be measured. The response signal receiver receives a response signal from the object in response to the measurement signal. The frequency specifier specifies a resonant frequency at a resonance peak from the response signal. The coefficient specifier specifies a correction coefficient of a correction filter for reducing the resonant frequency based on the specified resonant frequency. The filter performs filtering on a signal to be output to the object using the correction filter with the correction coefficient. The outputter outputs the signal having undergone the filtering to the object. | 07-01-2010 |
20100166218 | Sound Processor, Sound Reproducer, and Sound Processing Method - According to one embodiment, a sound processor includes a creating module, a filter, and a combining module. The creating module creates a plurality of first acoustic models based on a frequency characteristic that represents an acoustic property of an object to be measured. The first acoustic models are modeled with respect to resonance properties that vary depending on frequency bands. The filter extracts frequency components in the frequency bands from the respective first acoustic models. The combining module combines the frequency components extracted from the first acoustic models to create a second acoustic model. | 07-01-2010 |
20100266075 | INFRARED SIGNAL DECODE CIRCUIT AND INFRARED SIGNAL DECODE METHOD - According to one embodiment, an infrared signal decode circuit includes: a comparator; a correlation signal generator generating a sum of a first detection signal and a second detection signal as a correlation signal, the first detection signal being obtained by performing an absolute value calculation on a first correlation signal, the second detection signal being obtained by performing an absolute value calculation on a second correlation signal, the first correlation signal corresponding to a correlation between a binary signal and a first reference signal with a frequency substantially identical to a base frequency of a subcarrier of an infrared signal, the second correlation signal corresponding to a correlation between the binary signal and a second reference signal with a phase that differ from a phase of the first reference signal by 90 degrees; and a decoder binarizing the correlation signal generated by the correlation signal generator. | 10-21-2010 |
Patent application number | Description | Published |
20080291073 | PARALLEL-TYPE A/D CONVERTER - According to one embodiment, a parallel-type A/D converter includes a reference voltage generating circuit which generates a plurality of reference voltages, a plurality of preamplifier circuits which amplify a potential difference between each of the reference voltages and an analog input voltage, a plurality of comparator circuits which compare sizes of the reference voltages and the analog input voltage for which a potential difference is amplified by each of the preamplifier circuits, an encoder circuit which converts a comparison result by the plurality of comparator circuits into a binary code, and a control circuit which controls gains of the plurality of preamplifier circuits and direct current offset voltages of the plurality of comparator circuits. | 11-27-2008 |
20090296949 | ACOUSTIC CHARACTERISTIC CORRECTION APPARATUS, ACOUSTIC CHARACTERISTIC MEASUREMENT APPARATUS, AND ACOUSTIC CHARACTERISTIC MEASUREMENT METHOD - According to one embodiment, an acoustic characteristic measurement apparatus comprises a generation module configured to generate a measuring pulse for measuring an acoustic characteristic of a subject, an acquisition module configured acquire an acoustic characteristic of the subject based on a response signal from the subject, and a transducer module configured to transduce the measurement pulse into an acoustic signal to be transmitted to the subject and transduce an acoustic response signal from the subject into an electrical response signal to be supplied to the acquisition module. | 12-03-2009 |
20090302935 | DEMODULATOR - According to one embodiment, a threshold adjusting apparatus for a clocked comparator, the clocked comparator comparing an input signal with a threshold in accordance with a clock, the threshold adjusting apparatus comprises an output detection module configured to detect an output from the clocked comparator with the threshold while changing the threshold and a setting module configured to set the threshold when the output detection module detects a change in the output from the clocked comparator as an adjusted threshold. | 12-10-2009 |
20100142719 | ACOUSTIC APPARATUS AND METHOD OF CONTROLLING AN ACOUSTIC APPARATUS - According to one embodiment, an acoustic apparatus comprises an electro-acoustic transducer with a first function of converting an electric signal to an acoustic signal and a second function of converting an acoustic signal to an electric signal, the electro-acoustic transducer configured to convert a measuring electric signal to a measuring acoustic signal using the first function, and to convert an acoustic response signal responding to the measuring acoustic signal from an object to an electric response signal using the second function, a switch configured to switch the first function to the second function, or vice versa, and a switch controller configured to control a function switching of the switch in accordance with a sound source signal. | 06-10-2010 |
20100150362 | ACOUSTIC APPARATUS - According to one embodiment, an acoustic apparatus comprises a measuring signal generator, a transducer configured to convert a measuring signal to a measuring sound and to convert a characteristic vibration of the transducer due to the measuring sound, to a characteristic vibration signal, an analysis module configured to analyze the characteristic vibration signal in order to output a physical quality of a characteristic vibration of the transducer, a controller configured to set a first state in which the transducer converts an electric signal to an acoustic signal or a second state in which the transducer converts an acoustic signal to an electric signal. The measuring signal generator is connected to the transducer in the first state and the analysis module is connected to the transducer in the second state. | 06-17-2010 |
20140320068 | BATTERY CHARGER, BATTERY CHARGING METHOD AND ELECTRONIC APPARTUS - According to one embodiment, a first switch outputs charging voltage and charging current for battery charge. A second switch is smaller than the first switch, and outputs voltage and current generated based on the control voltage from the regulator. A voltage detector detects output voltage of the first switch if the output voltage is or more than a predetermined value. A current detector detects output current of the second switch if the output current is or less than a predetermined value. A logic circuit determines whether charging is continued or stopped based on a logical operation performed on outputs from the voltage detector and the current detector. | 10-30-2014 |