There is provided a fault detecting device for a multiplex signal transmission system which comprises a fault detecting circuit, whereby when a fault occurs in the level signal line for sending load actuating command signals in a multiplex signal transmission system operated in a time-shared manner, the fault detecting circuit generates a signal for preventing the actuation of the loads due to the fault.

There is provided an electric control system comprising a computing section integrally built into a MOS large scale integrated circuit (comprising a timing signal generating circuit, a speed signal generating circuit, a vehicle speed discriminating circuit, a control program circuit, etc.) which, in accordance with the digital signals from various sensors for detecting the operating conditions of an engine, generates solenoid signals for selectively controlling solenoid valves which effect exhau...

An operating system for predicting collision is provided wherein a first wave of a reflected wave, which has been transmitted from an oscillator and reflected from a target, is received, a second wave having a frequency different from that of the first wave is caused to interfere with the first wave to produce a beat wave, and the frequency of the first and second waves is changed at a specified phase angle of the beat wave, whereby at least either one of the polarity of the beat wave and the am...

In a method of producing a semiconductor device, an amorphous silicon layer is deposited on a polycrystalline silicon layer formed on an insulator layer (SiO.sub.2). Ions are implanted into the amorphous silicon layer while heat treating the amorphous silicon layer at a low temperature thereby forming a solid-phase growth layer, and a transistor is formed of the solid-phase growth layer.

A thin film electroluminescent element has a substrate, a transparent electrode formed on the substrate, a luminescent film wherein two kinds of luminescent centers are distributed in layers within a basic luminescent material, formed on the transparent electrode through an insulating film, and a back electrode formed on the luminescent film through another insulating film. The luminescent film of this thin film electroluminescent element can emit white light of excellent tone, including lights ...

A semiconductor pressure sensor having a cylindrical housing with an opening formed at its tip end which is exposed to a pressure atmosphere and a metal diaphragm for receiving pressure, which is formed in a wall of the cylindrical housing defining the opening. A metal oxide layer is formed in a surface of the metal diaphragm by oxidizing the surface of the metal diaphragm, and a glass layer is formed on the metal oxide layer. A semiconductor chip, on which a strain gauge is formed, is firmly an...

An electromagnetic apparatus for driving a valve such as an intake valve of an internal combustion engine drives the valve to its closing position without generating vibration and noises which are detrimental to durability and reliability of the valve. The valve speed is controlled either mechanically or electrically so that it is reduced to substantially zero when the valve sits on a valve seat. To mechanically control the valve speed, air or magnetic liquid is used as a cushion against the val...

The present invention discloses an antiferroelectric liquid crystal composition respectively containing the compounds of formula (1), (2), (3) or (4), wherein R.sub.1, R.sub.3, R.sub.5 and R.sub.7 are alkyl groups having 7-13 carbon atoms, R.sub.2, R.sub.4, R.sub.6 and R.sub.8 are alkyl groups having 4-8 carbon atoms, any of the four hydrogen atoms in each of the phenyl groups of the formulas may be substituted with a halogen atom such as F, Cl or Br, or a CH.sub.3 group, and X indicates --O-- o...

A rolling code producing method is provided which may be employed in a keyless entry system for automotive vehicles designed to compare a rolling code derived in a receiver installed in the vehicle and a rolling code derived in a portable transmitter to allow authorized access to the vehicle if both the rolling codes match. The rolling code producing method includes producing different rolling codes, in sequence, using an initial code variable according to a given algorithm and changing the init...

An antiferroelectric liquid crystal composition having a chiral smectic C.sub.A * phase composed by blending liquid crystal composition-constituting compounds having the same direction of inclination of optic axis produced by application of an electric field and/or comprised of a mixture of two enantiomers of a liquid crystal material; one having the stereosense (+) and the other having the stereosense (-). The stereosense is defined so that, when the molecule is viewed so that the bond between ...