Hitachi, Ltd.

Agilent Technologies, Inc.

Yoichi Nagata

Ryosuke Tobiyama

Takeo Kuwabara

Shusaku Tsuruga

To achieve an effective gas filtering in a plasma spectrometric apparatus using a gas of a comparatively high consumption flow rate, and to improve the analytical ability, there is provided a plasma spectrometric apparatus containing a sample introducer for producing and delivering an injector gas containing an analyte sample, a plasma generator for generating plasma into which the injector gas is introduced, and an analyzer disposed subsequent to the plasma generator for analyzing the analyte sample. The plasma spectrometric apparatus contains a first gas line for supplying gas to the sample introducer, a second gas line for supplying gas to the plasma generator, and a filter located in the first gas line for removing impurities contained in the gas.

Method for supplying gas for plasma based analytical instrument

A CMI coding method, a CMI decoding method, a CMI coding circuit, and a CMI decoding circuit which do not adversely affect a main signal to be CMI-coded and which allow a high-speed asynchronous signal to be always transmitted by Coding Rule Violation, with a simple procedure and a simple hardware structure are provided. A CMI coding method is used in which an asynchronous signal is superposed on a main signal with the use of only CRV as CRV. In addition, when the main signal is replaced with CRV for a signal to be superposed, since the main signal cannot be transmitted, the CMI coding method is configured such that two bits of the main signal, which should be originally transmitted in a time slot (CRV-indication time slot) in which CRV is to be disposed and in the next time slot thereof, are two-bit-coded according to a predetermined rule, and the two-bit code is transmitted by the use of the first half and the second half of the next time slot (crammed main-signal time slot).

CMI-code coding method, CMI-code decoding method, CMI coding circuit, and CMI decoding circuit

The present invention relates to a digital signal multiplex and communication system having monitoring function of the signal path. The digital path monitoring method according to the present invention comprises step of counting '1's included in information bits sandwiched by two stuff pulses for each lower-rate signal before multiplexing a plurality of lower-rate signals into one higher-rate signal, step of inserting a parity bit corresponding to the number of '1's obtained as a result of the connecting step into the latter stuff pulse insertion position of the lower-rate signal which appears just after the counting, step of multiplexing the lower-rate signals with the parity bits inserted, step of transmitting the higher-rate signal obtained as a result of the multiplexing step, step of demultiplexing the higher-rate signal into a plurality of lower-rate signals, step of counting, for each of the lower-rate signals obtained as a result of the demultiplexing step, '1's included in a information bits sandwiched by two parity bits which are adjacent, step of checking the number of '1's thus connected with the parity bit which appears just after the counting, and step of judging if the digital path is normal of abnormal on the basis of the result of the checking step.

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Tokyo, Japan

Yoichi Nagata