Tatsuo Nakagawa
Tatsuo Nakagawa, Hachioji JP
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20100103986 | Receiver - With the objective of enhancing receiving performance of a receiver with respect to pulse signals spread by spread codes, the receiver comprises an RF front-end section which performs amplification, an AD converter section which AD-converts signals outputted from the RF front-end section, a baseband section which inversely spreads the output of the AD converter section and performs signal detection and demodulation thereon, a reception environment measuring section which measures reception environment using the input signals of the baseband section, and a parameter setting section which sets parameters for respective parts on the basis of signals outputted from the reception environment measuring section. The parameter setting section sets the parameters for the respective parts to the optimum according to the environmental condition measured by the reception environment measuring section. | 04-29-2010 |
20110092223 | Reciever, frequency deviation measuring unit and positioning and ranging system - In a system for measuring a time difference of arrival of signals for positioning, an accurate time difference is measured by a receiver which is reduced in power consumption, size, and cost. The system comprises a node (under measurement) for transmitting a positioning signal, a reference station for transmitting a reference signal, and a plurality of access points for receiving the positioning signal and reference signal, and a server connected to the plurality of access points through a network. Each of the plurality of access points measures a time difference between the reception of the positioning signal and the reception of the reference signal, and a frequency deviation from the reference station, using a clock signal and a signal for shifting the clock signal, and the server calculates the position of the node based on the measured time difference and frequency deviation. | 04-21-2011 |
Tatsuo Nakagawa, Kokubunji JP
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20100111146 | COMMUNICATION DEVICE AND COMMUNICATION SYSTEM - A communication device with digital and analog circuits mixedly mounted thereon, for which the influence of noise generated in its interface part on the analog circuit part can be reduced, which does not interfere with the downsizing of the communication device. The communication device has a communication part, such as semiconductor communication device, and a control part, such as a semiconductor control device operable to control the communication part. The communication part and control part are operated in asynchronization with each other. The communication part includes an analog circuit. The interface circuit of the communication part, which is interfaced with the control part, receives a clock signal supplied from the communication part and conducts a synchronous interface. The control part stops supplying the clock signal during the time when the communication part operates the analog circuit. | 05-06-2010 |
20100112959 | ELECTRONIC CIRCUIT AND RADIO COMMUNICATIONS SYSTEM - The electronic circuit includes: a micro controller unit; a timer operable to measure a standby time of the micro controller unit; a buffer circuit connected with an output-signal terminal of the timer; a logic circuit controlled by an output signal of the timer and an output signal of the micro controller unit; and a power-on switch controlled by the logic circuit. The buffer circuit has no protection diode connected with an input terminal thereof on a power-source side, and connected to a common power source shared with the micro controller unit. The switch is one for controlling the power source of the micro controller unit and buffer circuit. The micro controller unit is made to transition to an active state to either a standby state or a power-source cutoff state during the standby time. | 05-06-2010 |
20130040590 | ELECTRONIC CIRCUIT AND RADIO COMMUNICATIONS SYSTEM - The electronic circuit includes: a micro controller unit; a timer operable to measure a standby time of the micro controller unit; a buffer circuit connected with an output-signal terminal of the timer; a logic circuit controlled by an output signal of the timer and an output signal of the micro controller unit; and a power-on switch controlled by the logic circuit. The buffer circuit has no protection diode connected with an input terminal thereof on a power-source side, and connected to a common power source shared with the micro controller unit. The switch is one for controlling the power source of the micro controller unit and buffer circuit. The micro controller unit is made to transition to an active state to either a standby state or a power-source cutoff state during the standby time. | 02-14-2013 |
Tatsuo Nakagawa, Kodaira JP
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20120243264 | Power Supply Device - A power supplying device performs both of a suppression of EMI noise and a reduction in an output voltage. In the power supply device, a switching control device that controls a switching element according to a pulse control signal includes a PPM circuit that modulates a pulse position; a PWM circuit that modulates a pulse width; and a pulse generator circuit that generates a pulse modulated by the PPM circuit and the PWM circuit. When a pulse interval of the pulse modulated in the pulse position by the PPM circuit is sparser than the pulse interval of the pulse before the modulation, the PWM circuit lengthens the pulse width. On the contrary, when the pulse interval of the pulse modulated in the pulse position by the PPM circuit is denser than the pulse interval of the pulse before the modulation, the PWM circuit shortens the pulse width. | 09-27-2012 |
20130113644 | Measurement Device - Disclosed is a measurement device that can accurately measure size, position, the presence of an object, and the like by means of a simple and low-cost method. Specifically, disclosed is a measurement device that is provided with: a transmitter that transmits radio waves; a vibrating surface that vibrates mechanically; a receiver that receives radio waves; and a controller that transmits radio waves from the transmitter, and on the basis of the signal of the radio waves reflected by the vibrating surface and received by the receiver, outputs information about a measured object on the pathway between the transmitter and the receiver with the vibrating surface therebetween. | 05-09-2013 |
Tatsuo Nakagawa, Tokyo JP
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20130278059 | SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE, POWER SUPPLY DEVICE, AND METHOD OF CONTROLLING POWER SUPPLY DEVICE - A conventional power supply device has a problem in miniaturization. A power supply device generates a prediction value of an error signal from first and second error signals, and controls an output voltage so that the prediction value lies between first and second threshold values. The first error signal is obtained by converting an error voltage based on the difference between the output voltage and a reference voltage at a first timing. The second error signal is obtained by converting an error voltage based on the difference between the output voltage and the reference voltage at a second timing. | 10-24-2013 |
20140154790 | BIOMOLECULE INFORMATION ANALYSIS DEVICE - Provided is a device that, on the basis of a measurement result of a current that has a low value and a wide distribution, identifies the composition of biological molecules passing through a nanoparticle path. This biomolecule information analysis device obtains a current value by applying an electrical field to biomolecules passing through a gap between a first electrode and a second electrode, and identifies the structure of the biomolecules by integrating the current value and making a comparison with a reference value (see FIG. | 06-05-2014 |