Abstract: The object is simplification of a configuration in a pulse generator for UWB transmission, lower power consumption, and suppression of LO leakage by nonuse of the LO signal.

Abstract: An ultra-wideband transmitter is provided which can reduce a leak of a local signal into a transmitted signal with a pulse train output from an antenna in UWB-IR communication. The transmitter comprises a pulse generator 0140 for generating a pulse signal having a pulse train of pulses produced intermittently according to data to be transmitted, an oscillator 0120 for producing a local signal, a frequency converter 0130 to which the pulse signal output from the pulse generator and the local signal output from the oscillator are input, and for frequency-converting the pulse signal to output a RF signal, an amplifier 0110 for amplifying the RF signal output from the frequency converter, and an antenna 0000 for emitting the RF signal output from the amplifier in the air. In a period corresponding to a pause period of the pulses produced intermittently, a leak of the local signal into the RF signal output from the antenna is reduced using a control signal 0300.

Abstract: An automaton configured to perform a task comprises a communication interface to communicate positional information with one or more anchor points provided within a given environment. The positional information enables generation of mapping information of the given environment. A motor provides the automation with mobility. A memory stores the mapping information. A controller controls the motor to enable the automaton to perform the task in the given environment using a first task route that has been generated using the mapping information.

Abstract: Events determine the timing of when to change performance, for example when to scan or when to use a prior stored usually best-performance configuration or just a last configuration, for a smart antenna in a fixed or almost fixed usage like a wireless local area network and a television system. Thereby the system maintains unchanged the parameters, such as those that determine the beam form of the smart antenna until monitoring recognizes one or a combination of more than one of the following conditions or event occurrences; the device communicate with another device for the first time; reboot of the device or the device turns on; the received signal exceeds a predetermined bit error rate (BER); the received signal strength indicator (RSSI) is less than a determined RSSI; the received signal goes below a predetermined signal to noise ratio (SNR); and a user's demand.

Abstract: A high frequency power amplifier is provided that prevents loop oscillation at a low frequency caused by a closed loop formed between combined semiconductor devices. Previously, coupled-line directional couplers or capacitors for low frequency rejection have been used to prevent the closed loop from being formed. Also, a circuit including a resistance component required for attenuating self-oscillation has been provided. Therefore, to prevent both loop oscillation and self oscillation, two circuits have been required. Accordingly, a high frequency power amplifier is provided with a low frequency prevention circuit that attenuates the passing of each frequency of loop oscillation and self oscillation to each signal line divided by a power divider. Thus, the two circuits respectively required for preventing the loop oscillation and self oscillation of a travelling wave combine type amplifier can be formed by one low frequency prevention circuit.

Abstract: The invention provides a high frequency power amplifier that prevents loop oscillation at a low frequency which is caused by a closed loop formed between combined semiconductor devices in case plural power combine circuits are used for tournament connection. Heretofore, for a countermeasure for the loop oscillation, a coupled-line directional coupler is used or a capacitor for low frequency rejection to prevent a closed loop from being formed is inserted into each signal line and a bias circuit is provided separately. Also, as a semiconductor device causes self oscillation by impedance applied to the input and output, a circuit including a resistance component required for attenuating an oscillated signal is provided. Therefore, to prevent both loop oscillation and self oscillation, two circuits are required.