Patent application number | Description | Published |
20090015306 | SIGNAL GENERATING APPARTUS, FILTER APPARATUS, SIGNAL GENERATING METHOD AND FILTERING METHOD - There is provided a signal generating apparatus including: a multiphase oscillating portion for generating a number of base signals having the same frequency and a predetermined phase difference of which the signal level transitions between a first level and a second level, and where periods during which the signal level of any given base signal is at the first level and the signal level of the next base signal having the predetermined phase delay relative to the given base signal is at the first level overlap; and a transition time point changing portion for generating a pulse signal by changing the time point when each base signal transitions from the first level to the second level to a time point before the next base signal transitions from the second level to the first level. | 01-15-2009 |
20090021297 | SIGNAL PROCESSING APPARATUS, FILTER APPARATUS, SIGNAL PROCESSING METHOD AND FILTERING METHOD - There is provided a signal processing apparatus including a variable capacitor and a switching portion for switching the circuit mode between a sampling mode, in which the variable capacitor samples an input signal, a holding mode, in which a charge gained by sampling the input signal is held in the variable capacitor, and an output mode for outputting the charge stored in the variable capacitor, wherein the variable capacitor is provided with an input terminal through which the input signal is inputted in the sampling mode, a control terminal to which a first control signal which decreases the capacitance of the variable capacitor to a value below the capacitance in the sampling mode is inputted in the output mode, and a second control signal having a predetermined reference voltage is inputted in the holding mode, where an insulating layer is provided between the control terminal and the input terminal. | 01-22-2009 |
20090134916 | Charge Domain Filter Circuit - A charge domain filter circuit includes a first signal output portion, a second signal output portion, and an adder portion. The first signal output portion outputs a first signal that is sampled at a specified time interval. The second signal output portion outputs a second signal that is sampled at the same time interval as the first signal and at a different time. The adder portion adds the first signal and the second signal together and outputs the result. The second signal output portion is capable of selecting the time to sample the second signal from among a plurality of times. | 05-28-2009 |
20090134938 | Charge Domain Filter Circuit - A charge domain filter circuit includes a first signal output portion, at least one second signal output, portion, a third signal output portion, and an adder portion. The first signal output portion outputs a first signal that is sampled at a specified time interval. Each second signal, output portion outputs a second signal that is sampled after a specified delay after the first signal is sampled. Where a plurality of the second signal output portions is included, the second signals are sampled in succession. The third signal output portion outputs a third signal that is sampled after a specified delay after the last second signal is sampled. The adder portion adds the first, second, and third signals together and outputs the result. The capacitance ratio of the sampling capacitors in the first signal output portion and the second signal output portion is one of continuously or discretely varied. | 05-28-2009 |
20090135039 | Switched Capacitor Circuit, Switched Capacitor Filter, and Sigma-Delta A/D Converter - A switched capacitor circuit includes a capacitor that performs sampling, a first switch that is provided between the capacitor and an input terminal, and a second switch that is provided between the capacitor and an output terminal. The first switch and the second switch receive an input of a clock signal and turn on and off. The capacitor is a variable capacitance element in which the value of the capacitance changes in synchronization with the clock signal. | 05-28-2009 |
20090219086 | AMPLIFIER, AMPLIFYING METHOD, AND FILTER - An amplifier is provided which includes: a first variable capacitance device of which capacitance is variable, a second variable capacitance device of which capacitance is variable, electrically connected to the first variable capacitance device, and of an inverse conductivity type from the first variable capacitance device, and a first input unit for selectively inputting a bias voltage and a voltage signal to the first variable capacitance device and the second variable capacitance device, wherein, in the event that the bias voltage and the voltage signal are input to the first variable capacitance device and the second variable capacitance device, the capacitance of the first variable capacitance device and the second variable capacitance device is taken as a first value, and wherein the voltage signal is amplified with the capacitance of the first variable capacitance device and the second variable capacitance device as a second value smaller than the first value. | 09-03-2009 |
20100156560 | FILTER CIRCUIT AND COMMUNICATION DEVICE - There is provided a filter circuit that includes a flying capacitor and a capacitor that is provided in parallel with the flying capacitor, between an input terminal and an output terminal of the flying capacitor. As the capacitor that has a predetermined capacity is provided between the input terminal and the output terminal of the flying capacitor, it is possible to provide steep attenuation characteristics in the filter circuit provided with the flying capacitor. | 06-24-2010 |
20100156561 | FILTER CIRCUIT AND COMMUNICATION DEVICE - There is provided a filter circuit that includes: a flying capacitor which maintains polarity when switching from an input terminal to an output terminal, and the polarity of which is reversed when switching from the output terminal to the input terminal; a first capacitor that is provided in parallel to the flying capacitor, at the input terminal of the flying capacitor; and a second capacitor that is provided in parallel to the flying capacitor, at the output terminal of the flying capacitor. The flying capacitor includes a variable capacity element such that capacity becomes smaller when switching from the input terminal to the output terminal and capacity becomes larger when switching from the output terminal to the input terminal. | 06-24-2010 |
20100156564 | FILTER CIRCUIT AND COMMUNICATION DEVICE - There is provided a filter circuit that includes: a flying capacitor which maintains polarity when switching from an input terminal to an output terminal, and the polarity of which is reversed when switching from the output terminal to the input terminal; a first capacitor that is provided in parallel with the flying capacitor, at the input terminal of the flying capacitor; and a second capacitor that is provided in parallel with the flying capacitor, at the output terminal of the flying capacitor. The flying capacitor is switched from the input terminal to the output terminal with a delay of a predetermined time after the switching from the output terminal to the input terminal, and the flying capacitor is switched from the output terminal to the input terminal with a delay of a predetermined time after the switching from the input terminal to the output terminal. | 06-24-2010 |
20100264751 | FILTER CIRCUIT AND COMMUNICATION APPARATUS - A filter circuit according to the present invention includes a voltage-current conversion unit that converts a voltage signal input to an input end to a current signal, a capacitor group that is made up of a plurality of capacitors, where the current signal output from the voltage-current conversion unit is sequentially input to each capacitor at every cycle, a first switch that connects a set of capacitors to which the current signal is input with each other and adds charges accumulated in the set of capacitors together, and a second switch that connects at least one capacitor of the set of capacitors to an output end after charges are added by the first switch. | 10-21-2010 |
20100289567 | FILTER CIRCUIT AND COMMUNICATION DEVICE - A filter circuit includes a voltage-current conversion portion that converts a voltage signal input to an input terminal to a current signal, a first capacitor unit formed by a plurality of capacitors, and in which a current signal output from the voltage-current conversion portion is sequentially input to the capacitors, the unit adding and outputting electric charges of a group of capacitors to which the current signal is input, a second capacitor unit formed by a plurality of capacitors, and in which a current signal output from the first capacitor unit is sequentially input to the capacitors, the unit adding and outputting electric charges of a group of capacitors to which the current signal is input, and a plurality of connection nodes that respectively connect a given capacitor in the first capacitor unit and a capacitor in the second capacitor unit. | 11-18-2010 |
20130034001 | TERMINAL APPARATUS, COMMUNICATION CONTROL APPARATUS, WIRELESS COMMUNICATION SYSTEM, AND COMMUNICATION CONTROL METHOD - Provided is a terminal apparatus including a first communication unit that performs communication according to a first wireless communication scheme using frequency division duplex; a second communication unit that performs communication according to a second wireless communication scheme different from the first wireless communication scheme; a detecting unit that detects deterioration of reception quality of the first communication unit due to generation of the communication by the first communication unit and the communication by the second communication unit at the same timing; and a reporting unit that reports the deterioration of the reception quality to a communication control apparatus scheduling the communication by the first communication unit, when the deterioration of the reception quality is detected by the detecting unit. | 02-07-2013 |
20130130628 | WIRELESS COMMUNICATION DEVICE, BASE STATION, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION SYSTEM - Provided is a wireless communication device including a receiving unit for receiving information based on measurement of radio conditions transmitted from a base station in association with identification information; and a control unit for controlling communication by using the information received by the receiving unit when the wireless communication device corresponds to the identification information received by the receiving unit. | 05-23-2013 |
20130155864 | WIRELESS TERMINAL, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION SYSTEM - There is provided a wireless terminal including a storage section that stores information on a plurality of wireless terminals forming a group in which the wireless terminal operates as a representative wireless terminal, a communication control section that controls random access to a base station before another wireless terminal in the group, and a transmitting section that transmits the information on the plurality of wireless terminals stored in the storage section to the base station. | 06-20-2013 |
20130155994 | BASE STATION, WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION SYSTEM - There is provided a base station including a receiving section that receives information on a plurality of wireless terminals from a representative wireless terminal representing the plurality of wireless terminals, a control information setting section that sets control information for controlling random access by the plurality of wireless terminals based on the information on the plurality of wireless terminals received by the receiving section, and a transmitting section that transmits the control information set by the control information setting section to the plurality of wireless terminals. | 06-20-2013 |
20140016525 | RADIO COMMUNICATION APPARATUS, RADIO COMMUNICATION METHOD, AND PROGRAM - There is provided a radio communication apparatus including a duplexer including a first terminal for inputting and outputting a signal in a first frequency band, a second terminal for inputting and outputting a signal in a second frequency band, and a third terminal connected to an antenna, a reception system circuit which processes a reception signal, a transmission system circuit which generates a transmission signal, and a switch which, in a first mode, connects one of the first terminal and the second terminal to the reception system circuit and connects the other one of the first terminal and the second terminal to the transmission system circuit and which, in a second mode, connects the one of the first terminal and the second terminal to the reception system circuit and the transmission system circuit alternately. | 01-16-2014 |
20140112279 | COMMUNICATION TERMINAL DEVICE AND METHOD, BASE STATION DEVICE, AND COMMUNICATION SYSTEM - The present technique relates to a communication terminal device and method, a base station device, and a communication system that enable efficient communications. A first communication unit that performs a first communication with a first other device transmits information indicating the margin in which the first communication is not disturbed by a second communication with a second other device, to the first other device. The communication terminal device and the communication system of the present technique can be used to perform efficient communications between a personal computer and a communication system utilizing the personal computer, for example. | 04-24-2014 |
20140133424 | COMMUNICATION APPARATUS, COMMUNICATION METHOD, COMMUNICATION SYSTEM, AND BASE STATION - There is provided a communication apparatus including a signature selection unit that selects one signature from a plurality of signatures, and a preamble generation unit that generates a signature in random access using the preamble selected by the signature selection unit. The signature selection unit selects the signature corresponding to a value of transmission data. | 05-15-2014 |
20140140292 | COMMUNICATION APPARATUS, COMMUNICATION METHOD, COMMUNICATION SYSTEM, AND BASE STATION - There is provided a communication apparatus including a resource selection unit that selects a communication resource to transmit a preamble in random access. The resource selection unit selects the communication resource corresponding to a value of transmission data. | 05-22-2014 |
20140314037 | COMMUNICATION TERMINAL, COMMUNICATION METHOD, BASE STATION AND COMMUNICATION SYSTEM - Provided is a communication terminal including a timing detection unit that detects arrival of timing according to a configured cycle, a condition determination unit that determines whether or not a shared condition shared with a base station is satisfied, and a communication controller that controls reception of paging when the timing detection unit detects the arrival of timing and the condition determination unit determines that the shared condition is satisfied. | 10-23-2014 |