Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Semiconductor Technology Academic Research Center

Junji Nakatsuka

Hiroya Ueno

Masaaki Nagai

Koji Obata

Jun'ichi Naka

Hiroki Yoshino

Keisuke Kuroda

Yoshito Date

Gorou Mori

Tetsuro Ohmori

Yoshio Imamura

Takuya Kajiwara

Shoichi Takeshita

Yoshinobu Tokuno

Takashi Hirata

Masayoshi Kinoshita

Yoshihide Komatsu

Heiji Ikoma

Atsushi Iwata

Tsuyoshi Ebuchi

Kazuaki Sogawa

Mamoru Sasaki

Takeshi Yoshida

Yuji Yamada

Yoshihiro Masui

Toshihiro Torii

Takaaki Sato

Masashi Uchida

Satoshi Hori

Yoshihiro Horii

Satoshi Kobayashi

Takayuki Mashimo

Tadayoshi Ishikawa

A signal processing device includes detection circuitry and correction circuitry. The detection circuitry includes a first detection unit and a second detection unit. The first detection unit generates at least one detection signal based on an associated one of output signals corresponding to each of at least two directions. The second detection unit has a broader detection range than the first detection unit and generates at least one correction signal based on the associated one of the output signals corresponding to each of the at least two directions. The correction circuitry corrects an associated one of the detection signals corresponding to each of the at least two directions with at least an associated one of the correction signals corresponding to at least one direction, other than one direction subjected to correction, out of the at least two directions.

Signal processing device, inertial sensor, signal processing method, and program

Provided are an analog-to-digital (AD) converter, a sensor processing circuit, and a sensor system capable of improving responsiveness of feedback control. AD converter includes input part, AD conversion part, first output part, and second output part. The analog signal output from sensor is input to input part. AD conversion part digitally converts an analog signal to generate first digital data and second digital data. First output part outputs the first digital data to control circuit. Second output part outputs the second digital data to sensor before first output part outputs the first digital data.

Analog-to-digital converter, sensor processing circuit, and sensor system

A signal processing device includes a detection circuit, a correction circuit, and a comparator circuit. The detection circuit generates a first detection signal, based on an output signal of a capacitive detection element that detects inertial force. The correction circuit corrects non-linearity of the first detection signal and outputs a second detection signal thus corrected. The comparator circuit compares the first detection signal and the second detection signal with each other and outputs a comparison signal representing a result of comparison.

An A/D converter includes an A/D conversion unit and an output unit. The A/D conversion unit includes a second A/D converter (successive approximation register A/D converter) and generates first digital data having a first number of bits and second digital data having a second number of bits, where the second number of bits is smaller than the first number of bits. The output unit provides first output information that is the first digital data and also provides second output information based on the second digital data. The output unit provides the second output information before providing the first output information.

A/D converter, sensor processing circuit, and sensor system

A digital filter is used in an A/D converter and includes a first filter and second filter. The first filter outputs first digital data by performing filter processing on output of an A/D conversion unit included in the A/D converter. The second filter outputs second digital data by performing filter processing on the output of the A/D conversion unit. The second digital data has either a lower resolution or a smaller effective number of bits than the first digital data does. The second filter outputs the second digital data before the first filter outputs the first digital data.

Digital filter, A/D converter, sensor processing circuit, and sensor system

Provided are an analog-to-digital (AD) converter, a sensor system, and a test system capable of reducing the time for test processing. AD converter includes input part, AD conversion part, first output part, and second output part. The analog signal output from sensor is input to input part. AD conversion part digitally converts an analog signal to generate first digital data and second digital data. First output part outputs the first digital data to control circuit. Second output part outputs the second digital data to test controller before first output part outputs the first digital data. In the test mode, test controller determines whether or not sensor system including sensor is in an abnormal state on the basis of the second digital data.

Analog-to-digital converter, sensor system , and test system

A digital-to-analog converter includes: a first partial circuit with a first bank of resistors and a first group of switches; a second partial circuit; a first resistor; a third partial circuit with a third bank of resistors and a third group of switches; and a fourth partial circuit with a fourth bank of resistors and a fourth group of switches Supposing that the first resistor has a resistance value R, the fourth bank of resistors has a combined resistance value of 2R, the first bank of resistors has a combined resistance value of (2&#x2212;1)R, the third bank of resistors has a combined resistance value of (2&#x2212;1)R, and the second partial circuit has a combined resistance value of R/(2&#x2212;1).

Digital-to-analog converter

A battery assembly controller controls terminal voltages of a plurality of series-connected secondary batteries to be equal. The controller includes a discharge circuit selectively reducing the terminal voltages of the secondary batteries; and a monitoring circuit directly connected to positive and negative electrodes of the secondary batteries to monitor the terminal voltages of the secondary batteries.

Battery assembly controller which monitors voltages of secondary batteries and semiconductor integrated circuit used for the battery assembly controller

Battery assembly controller which monitors voltages of secondary batteries

In a DAC device, a distortion correction function g1(x) of a harmonic obtained from a result of a frequency analysis on an analog output signal of a DAC circuit is obtained. A correction value is determined based on the correction function g1(x) in accordance with an input digital signal, and is previously stored in a memory. A nonlinear correction circuit reads a corresponding correction value from the memory in accordance with the value of a digital signal output from a digital filter, and transmits the correction value to a subtractor. The subtractor subtracts the correction value from the digital signal output from the digital filter.

DAC device and audio system

A biosensor includes a working electrode, a counter electrodeopposing the working electrode, a working electrode terminaland a working electrode reference terminalconnected to the working electrodeby wires, and a counter electrode terminalconnected to the counter electrodeby a wire. By employing a structure with at least three electrodes, it is possible to assay a target substance without being influenced by the line resistance on the working electrode side.

Biosensor, biosensor chip and biosensor device

Growing community of inventors

Osaka, Japan

Junji Nakatsuka