Anritsu Corporation

Panasonic Intellectual Property Management Co., Ltd.

Kazuhiro Yamane

Kazuhiro Fujinuma

Takashi Sato

Hiroyuki Tominaga

Ittetsu Kaji

Toshiaki Ikematsu

Kiyoshi Komikawa

Naomi Ushioda

Kousuke Mitsunaga

A clock recovery circuit includes a reference clock generation unit that generates a reference clock subjected to SSC modulation, a clock recovery unit that recovers an SSC modulated clock of a data signal subjected to the SSC modulation in synchronization with the reference clock, and a modulation signal generation unit that generates a modulation signal based on cycle information indicating a cycle of a FM demodulated signal obtained by performing FM demodulation on the SSC modulated clock recovered by the clock recovery unit and slope information indicating a slope of the FM demodulated signal, in which the reference clock generation unit generates the reference clock by performing the SSC modulation on a clock of a VCO with the modulation signal, and feeds back the reference clock subjected to the SSC modulation to the clock recovery unit.

Clock recovery circuit, error rate measurement apparatus, and error rate measurement method

A vehicle can execute an automatic driving mode and a manual driving mode as a driving mode. An assistance device supports mode switching from the automatic driving mode to the manual driving mode. The assistance device includes an acquisition interface and a notification interface. The acquisition interface acquires data indicating a situation around the vehicle. The notification interface that communicates a candidate position derived based on the data acquired by the acquisition interface, the candidate position being a candidate of a position where the mode switching should be executed.

Assistance device for supporting switching between automatic driving mode and manual driving mode

Provided is a technique that can generate a spread spectrum clock signal in all of an upper-spread mode, a down-spread mode, and a center-spread mode. A spread spectrum clock generator () spreads a spectrum of a signal with a predetermined carrier frequency to generate a spread spectrum clock signal under the control of a control unit (). The control unit includes carrier frequency correction control means (). The carrier frequency correction control means shifts the predetermined carrier frequency to generate, from one spread mode, a spread spectrum clock signal of another pseudo spread mode.

Spread spectrum clock generator, pattern generator, spread spectrum clock generation method, and pattern generation method

A three-valued signal generation device includes a first differential amplifier that outputs a differential signal, a second differential amplifier that outputs a differential signal and an inverted differential signal in accordance with a level based on a reference voltage of an inverted pseudo LFPS signal, which is obtained by inverting a logic level of the pseudo LFPS signal, a first signal synthesis unit that synthesizes the differential signal from the first differential amplifier and the inverted differential signal from the second differential amplifier to perform positive logic output of a three-valued LFPS signal, and a second signal synthesis unit that synthesizes the inverted differential signal from the first differential amplifier and the differential signal from the second differential amplifier to perform negative logic output of the three-valued LFPS signal.

Three-valued signal generation device and three-valued signal generation method

The synthetic circuitsynthesizes an offset voltage from an offset voltage generatorwith a signal output from the other end of the first coiland supplies the synthesized signal to the other end of the second coilthrough an output matching resistor. A potential difference detection unitdetects a potential difference between both ends of the output matching resistor. A comparison circuitoutputs an overcurrent detection signal when a voltage value of a detection signal from the potential difference detection unitexceeds a positive or negative threshold voltage. When the overcurrent detection signal is input, a control unitturns off the switching meansand forcibly disconnects the synthetic circuitfrom the output matching resistor

Digital signal offset adjustment device and method and pulse pattern generation apparatus

The object of the present invention is to provide a data decision apparatus and an error measurement apparatus which can set the phase of the clock to the optimum state with respect to the data signal without continuously sweeping of the phase, and can keep the state for a long time. The data decision apparatus according to the present invention comprises a delay device () for delaying a data signal (Dc) outputted from a decision device () by one bit, a first phase detector () for detecting a phase difference between a data signal (Db) to be inputted to the decision device () and the data signal (Dc) outputted from the decision device (), a second phase detector () for detecting a phase difference between the data signal (Dc) outputted from the decision device () and a data signal (Dd) outputted from the delay device (), a third phase detector () for outputting a base voltage with respect to the output values of the first and second phase detectors (and), and a phase controller () for controlling a phase shift amount of a variable delay device () to equalize an output value (P) of the first phase detector () to a center value between an output value (P) of the second phase detector () and the base voltage (P).

Data decision apparatus and error measurement apparatus

The object of the present invention is to provide a waveform shaping device and an error measurement device which can perform a waveform shaping operation with the sufficient amplitude margin, even if the mark ratio of the inputted data signal is significantly varied and the amplitude of the inputted data signal is decreased. The waveform shaping device according to the present invention comprises a voltage detector () for detecting an inputted data signal (Da) to obtain an amplitude value and the center amplitude voltage of the inputted data signal (Da), a reference voltage generator () for generate the reference voltage corresponding to the center amplitude voltage, and a comparator () for comparing the inputted data signal (Da) with the reference voltage, and in which the waveform shaping device further comprises a correction information outputting section () for outputting correction informationV on the basis of a mark ratio (M) and an amplitude of the inputted data signal (Da), the correction informationV used to correct the center amplitude voltage detected by the voltage detector (), and a correction section () correct the reference voltage or the inputted data signal to be inputted to the comparator () on the basis of the correction information (V).

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Kanagawa, Japan

Kazuhiro Yamane