Abstract: As devices are often different in the characteristics from one another, semiconductor chips based on the devices have discrepancies in the performance. A semiconductor device having a semiconductor switching element and a drive controlling means (1) for generating from input signals (A) and (B) drive signals (a) and (b) to control the action of the semiconductor switching element is provided comprising a characteristic compensating means (2) for generating from a characteristic compensation input signal a compensation signal to eliminate variations in the transmission delay time of the drive controlling means (1).

Abstract: Disclosed is a coating composition for use in producing an insulating thin film, comprising: (A) at least one silica precursor comprised of at least one compound selected from the group consisting of an alkoxysilane and a hydrolysis product thereof; (B) at least one organic polymer; (C) water; (D) at least one alcohol; and optionally (E) an organic solvent for a mixture of the components (A), (B), (C) and (D); wherein the weight ratio (WR) of the water (C) to the at least one silica precursor (A) satisfies the formula 0.01<WR<10, and the weight of the water (C) is larger than that of the at least one alcohol (D), with the proviso that when the at least one organic polymer (B) is insoluble in a mixture of the water (C) and the alcohol (D), the coating composition comprises all of the components (A) to (E).

Abstract: A high-potential side power device driving circuit has a clock signal generation circuit generating the so-called internal clock signal by outputting a pulse in a constant cycle for driving NMOS transistors and an iterative pulse generation circuit monitoring the state of an external input signal in synchronization with an output signal of the clock signal generation circuit, receiving a pulsing input signal generated with reference to a ground potential and generating pulsing ON and OFF signals. Thus provided is a level shifting circuit capable of preventing a power device from a malfunction also when a dv/dt transient signal is supplied with time difference.

Abstract: Disclosed is a coating composition comprising: (A) a silica precursor comprising at least one member selected from the group consisting of alkoxysilanes and hydrolysis/polycondensation products formed by hydrolysis/polycondensation reactions of the alkoxysilanes under acidic conditions, and (B) an organic polymer containing 20% by weight or more, based on the weight of the organic polymer, of an organic block copolymer, wherein the coating composition has an acidic pH value.

Abstract: As devices are often different in the characteristics from one another, semiconductor chips based on the devices have discrepancies in the performance.

Abstract: As devices are often different in the characteristics from one another, semiconductor chips based on the devices have discrepancies in the performance.

Abstract: Disclosed is a coating composition for use in producing an insulating thin film, comprising:

Abstract: A large-time-constant microphone filter which contains resistance and capacitance as its constituent and can be formed in the same semiconductor chip as a microphone unit is achieved, which results in downsizing and cost reduction of the microphone unit. A transistor of a current mirror circuit is used as a resistance of a microphone filter, utilizing a differential resistance produced by a channel length modulation effect of the transistor or an Early effect. When variations in the drain-source voltage of the transistor occur, the drain-source current of the transistor slightly varies in linear characteristics and the transistor serves a high value of resistance. Being a current mirror circuit, the microphone filter is resistant to characteristic variations due to temperature changes and can be formed in a semiconductor chip without a significant increase in chip area.

Abstract: A high-potential side power device driving circuit has a clock signal generation circuit generating the so-called internal clock signal by outputting a pulse in a constant cycle for driving NMOS transistors and an iterative pulse generation circuit monitoring the state of an external input signal in synchronization with an output signal of the clock signal generation circuit, receiving a pulsing input signal generated with reference to a ground potential and generating pulsing ON and OFF signals. Thus provided is a level shifting circuit capable of preventing a power device from a malfunction also when a dv/dt transient signal is supplied with time difference.

Abstract: As devices are often different in the characteristics from one another, semiconductor chips based on the devices have discrepancies in the performance.

Abstract: A pressure switch with improved sealing of an airtight chamber, and improved electrical characteristics reducing chattering, increasing response rate, and minimizing the pressure necessary for activation. The pressure switch includes an upper substrate with a diaphragm readily deformed by an applied stress, a lower substrate overlapped with the upper substrate to form the airtight chamber, a contact electrically switched in response to the deformation of the diaphragm, and a sealing member continuously surrounding the airtight chamber, disposed between the first and second substrate, and hermetically sealing the airtight chamber.

Abstract: To obtain a pressure detection apparatus capable of changing output characteristics in a large area and changing a received pressure range without largely changing the apparatus in design.

Abstract: A sensor device includes a voltage-to-pulse-number converter having a timing controller. When power is supplied to the converter from a power circuit through a power line, a timer circuit inhibits itself from performing a control operation until operations of a sensor and an amplifier become stable. After a predetermined period of time has passed, the inhibition of the controls is canceled. Then, an analog-to-digital (A-D) conversion of an output of the amplifier by the A-D converter is performed. Subsequently, a counter counts down from a value obtained from the A-D conversion. When the output of the counter becomes 0, the operation of the counter is stopped. Clock signals used for the operation of the counter are input to the pulse output circuit which is enabled only when the counter operates. Thereby, the timing controller outputs to an event counter a pulse signal having a number of pulses proportional to an output of the sensor. The sensor device obtains high precision data.

Abstract: A method of controlling operation of a DC motor including the steps of detecting the level of acceleration caused by the rotation of the output shaft of the DC motor; determining the square root of the detected level of acceleration; and supplying the DC motor with a driving voltage which is determined in accordance with the difference between the square root of the acceleration and a voltage command.

Abstract: A semiconductor acceleration system for detecting acceleration by outputting an electrical signal includes a diagnostic circuit for detecting failures in an output amplifier of the system. The system includes strain gauge resistors on a semiconductor substrate and connected in a bridge circuit. The output terminals of the bridge circuit are connected to an output amplifier. The diagnostic circuit includes two constant current sources producing different constant current flows and respectively connected to the two output terminals of the bridge circuit. When a switch is closed connecting the constant current sources to ground so that the constant currents flow through two of the strain gauge resistors, the output signal of the amplifier is observed. The output signal with the switch open and closed discloses the existence of a fault in the output amplifier circuit and the location of that fault.

Abstract: A semiconductor acceleration detecting device provided with a pedestal electrically and mechanically connected to an electrode mounted on a base with an electrically conductive adhesive, a semiconductor chip electrically and mechanically connected to the pedestal with an electrically conductive adhesive like a cantilever, and a strain gauge for detecting deformation of the semiconductor chip due to an applied acceleration. Current used for detecting detachment flows from the electrode into a wire connected to a grounding terminal through the pedestal and the semiconductor chip. Moreover, a detachment between the base and the pedestal or between the pedestal and the semiconductor chip is sensed by detecting whether the current flows normally. Thereby, erroneous acceleration of the object can be prevented from being measured.

Abstract: A method of controlling operation of a DC motor including the steps of detecting the level of acceleration caused by the rotation of the output shaft of the DC motor; determining the square root of the detected level of acceleration; and supplying the DC motor with a driving voltage which is determined in accordance with the difference between the square root of the acceleration and a voltage command.

Abstract: The present invention is directed to a method of and an apparatus for detecting an angular velocity and a rotation angle of a rotary member. In the present invention, first and second accelerations at first and second points of the rotary member are detected, respectively. The first and second accelerations are added, while the first acceleration is subtracted from the second acceleration. From the added and subtracted values, then, an angular velocity and a rotary angle of the rotary member are calculated.

Abstract: A semiconductor sensor apparatus includes a resistor connected between an output terminal and a power source terminal or a ground terminal of the semiconductor sensor apparatus while an output voltage corresponding to a physical parameter measured by the apparatus is generated. An output voltage limiting circuit in the semiconductor apparatus, during normal operation, limits the output voltage to values between an upper limit and a lower limit. When at least one of the power source terminal, the output terminal, and a ground terminal is open, the limiting circuit causes the output voltage to fall outside of the predetermined range. Thus, the disconnection of any of the power source terminal, the output terminal, and the ground terminal can be detected from the output voltage.

Abstract: The present invention is directed to a method of and an apparatus for detecting an angular velocity and a rotation angle of a rotary member and for controlling a motor disposed to drive the rotary member. In the present invention, first and second accelerations at first and second points of the rotary member are detected, respectively. The first and second accelerations are added. From the added value an angular velocity of the rotary member is calculated. A signal is generated representing the angular velocity and compared with predetermined control instructions. A control input is generated based upon this comparison, and the motor is controlled based upon the control input.