Abstract: A current sensor includes a sensor element configured to output a value of physical quantity depending on current supplied to a load; and a sensor controller configured to output a current value based on the output value of the sensor element. The sensor controller is configured to: acquire the output value and a temperature of the sensor element while current is not supplied to the load; determine a correlation between the output value and the temperature based on a plurality of sets of the acquired output value and the acquired temperature; calculate an offset of the output value at a temperature while current is supplied based on the correlation for the temperature of the sensor element; calculate the current value from a value obtained by subtracting the offset from the output value of the sensor element while current is supplied; and output the calculated current value.

Abstract: A multilayer ceramic substrate includes a plurality of ceramic layers laminated each other. The plurality of ceramic layers form a bulge and a cavity having such a shape that an opening area of the cavity gradually becomes smaller toward a bottom of the cavity.

Abstract: A high frequency module incorporates a layered substrate, a plurality of elements mounted on a top surface of the layered substrate, and a metallic casing that covers these elements. The plurality of elements mounted on the top surface of the layered substrate include a band-pass filter element. The band-pass filter element includes a plurality of conductor layers for band-pass filter and a plurality of dielectric layers for band-pass filter that implement a function of a band-pass filter, but does not include any conductor layer that functions as an electromagnetic shield. A conductor layer for grounding that the layered substrate includes and the casing are each opposed to the band-pass filter element, and thereby function as an electromagnetic shield for the band-pass filter element.

Abstract: A multilayer ceramic substrate having a cavity is formed by the steps of laminating a plurality of ceramic green sheets including ceramic green sheets having through holes corresponding to the cavity to form a multilayer body, pressing the multilayer body and firing the pressed body. At this time, a shrinkage suppression green sheet is laminated on the surface of the a ceramic green sheet constituting the outermost layer of the multilayer body, and a shrinkage suppression green sheet piece is disposed on the ceramic green sheet exposed to the bottom of the cavity in accordance with the shape of the cavity. A burnable sheet is further disposed on the shrinkage suppression green sheet piece. Before the pressing step, an embedded green sheet separate from the ceramic green sheets (portion separated by inserting a cut) is disposed on the shrinkage suppression green sheet piece or the burnable sheet so that it is filled in the cavity. After the firing step, the embedded green sheet fired is removed.

Abstract: A multilayer ceramic substrate includes a plurality of ceramic layers laminated each other. The plurality of ceramic layers form a bulge and a cavity having such a shape that an opening area of the cavity gradually becomes smaller toward a bottom of the cavity.

Abstract: A front end module (2) comprises: a triplexer (11) for separating the AMPS band, the PCS band and the GPS band from one another; a duplexer (12) for separating transmission signals and reception signals in the AMPS band from each other; and a duplexer (13) for separating transmission signals and reception signals in the PCS band from each other. The duplexers (12, 13) each include an acoustic wave element that functions as a filter. A single multilayer substrate is used to integrate the triplexer (11) and the duplexers (12, 13). The triplexer (11) is made up of conductor layers located inside or on the surface of the multilayer substrate.

Abstract: A high frequency module incorporates a layered substrate, a plurality of elements mounted on a top surface of the layered substrate, and a metallic casing that covers these elements. The plurality of elements mounted on the top surface of the layered substrate include a band-pass filter element. The band-pass filter element includes a plurality of conductor layers for band-pass filter and a plurality of dielectric layers for band-pass filter that implement a function of a band-pass filter, but does not include any conductor layer that functions as an electromagnetic shield. A conductor layer for grounding that the layered substrate includes and the casing are each opposed to the band-pass filter element, and thereby function as an electromagnetic shield for the band-pass filter element.

Abstract: A multilayer ceramic substrate having a cavity is formed by the steps of laminating a plurality of ceramic green sheets including ceramic green sheets having through holes corresponding to the cavity to form a multilayer body, pressing the multilayer body and firing the pressed body. At this time, a shrinkage suppression green sheet is laminated on the surface of the a ceramic green sheet constituting the outermost layer of the multilayer body, and a shrinkage suppression green sheet piece is disposed on the ceramic green sheet exposed to the bottom of the cavity in accordance with the shape of the cavity. A burnable sheet is further disposed on the shrinkage suppression green sheet piece. Before the pressing step, an embedded green sheet separate from the ceramic green sheets (portion separated by inserting a cut) is disposed on the shrinkage suppression green sheet piece or the burnable sheet so that it is filled in the cavity. After the firing step, the embedded green sheet fired is removed.

Abstract: A front end module (2) comprises: a triplexer (11) for separating the AMPS band, the PCS band and the GPS band from one another; a duplexer (12) for separating transmission signals and reception signals in the AMPS band from each other; and a duplexer (13) for separating transmission signals and reception signals in the PCS band from each other. The duplexers (12, 13) each include an acoustic wave element that functions as a filter. A single multilayer substrate is used to integrate the triplexer (11) and the duplexers (12, 13). The triplexer (11) is made up of conductor layers located inside or on the surface of the multilayer substrate.

Abstract: A solenoid controlled valve comprises a spool. One end side of the spool is slidably inserted into a first fluid chamber of a sleeve in a fluid tight condition. The other end of the spool is loosely inserted into a second fluid chamber. The spool with a stationary orifice is provided in an inlet path extending in axial direction. A spring for urging the spool and a movable core fixed to the spool, and a coil are provided. When electric current is supplied to the coil, the movable core is attracted against the spring force and the spool moves opposite to the urging direction of the spring, so that the external peripheral face of the spool closes the first port and the second port.

Abstract: An anti-skid control apparatus includes a fluid pressure control valve positioned between a master cylinder and a wheel cylinder of each wheel. The fluid pressure control valve controls the wheel pressure cylinder. A reservoir is provided for temporarily storing brake fluid expelled from the wheel cylinder during an anti-skid control. A pumpless fluid pressure control device is also provided for circulating brake fluid stored in the reservoir back to a master cylinder without using a pump. A flow control valve for maintaining a constant flow of brake fluid is positioned between the master cylinder and the wheel cylinder.

Abstract: An antiskid control device for use in a motor vehicle which can be changed over to 2WD and 4WD by a changeover member, comprising: a drive signal output member for outputting a drive signal indicating that the changeover member is set to one of 2WD and 4WD such that changeover between antiskid control for 2WD and antiskid control for 4WD is performed in accordance with the drive signal; and a drive mode judging member which detects from behaviors of wheels of the motor vehicle that an actual drive mode of the motor vehicle is 2WD when the drive signal indicates that the changeover member is set to 4WD; wherein when the drive mode judging member has detected that the actual drive mode of the motor vehicle is 2WD, antiskid control for 4WD is changed over to antiskid control for 2WD.

Abstract: A pedal stroke detector detects the degree of depression of a brake pedal of a master cylinder to determine a road surface friction coefficient. A wheel speed detector monitors the speed of each wheel of a vehicle. A vehicle body speed calculator estimates the vehicle speed from the wheel speed of each wheel and the degree of depression of the brake pedal as detected by the pedal stroke detector. A lock symptom detecting mechanism detects a lock symptom from the estimated vehicle body speed and wheel speed. When a lock symptom is detected, a memory stores the degree of depression. Subsequent movement calculations are based on the larger of the degree of depression for the instant operational cycle and the degree of depression stored in memory.

Abstract: A traction control permit/prohibit determination apparatus has a traction controller which applies a traction brake pressure to a brake system provided on the drive wheel when spinning of the drive wheel is detected. The traction controller is set to an operation permit mode when the vehicle speed is in the low speed range, and set to an operation prohibited mode when the vehicle speed is in the high speed range. Also, the traction controller is set to an operation permit mode when the pad temperature is below a first predetermined temperature, and to an operation prohibited mode when the pad temperature is above a second predetermined temperature.

Abstract: An antilock brake control apparatus is provided for adjusting the wheel cylinder pressure with actuators that include on/off-type valves. The antilock brake control apparatus includes wheel speed detectors for detecting the speed of each wheel, a wheel speed and estimated vehicle speed calculation device for calculating the wheel and vehicle behavior, and a locking symptoms detection device for detecting wheel locking symptoms and recovery from a wheel locking condition. A target pressure setting device for setting a target pressure, which is the estimated value of the wheel cylinder pressure during antilock brake control, based on a wheel cylinder pressure and a locking symptoms detection edge, is also provided. Further, a pressurization signal setting device for setting a pressurization signal used to drive the actuators based on the target pressure is provided.

Abstract: An estimated vehicle speed computing device computes an estimated vehicle speed based on a computed non-drive wheel speed and a computed drive wheel speed of the vehicle. A first computed vehicle speed is computed based on the drive wheel speed and a second computed vehicle speed is computed based on the non-drive wheel speeds. When the first computed vehicle speed increase more than a predetermined level, the second computed vehicle speed is employed as the estimated vehicle speed. Furthermore, when the second computed vehicle speed is greater than the drive wheel speed, a speed other than the second computed vehicle speed is employed as the estimated vehicle speed.

Abstract: A braking control system is provided in which a braking force is controlled so that a braking effect corresponding to the human brake pedal input can be obtained by electronically controlling an auxiliary power other than a human power. The braking control system includes a current deceleration detection device that detects a current deceleration, an initial deceleration detection device that detects an initial deceleration at a human operation input start time, and a control target addition quantity setting device that sets up a control target addition quantity based on a signal of the human operation input quantity. A control target quantity device is also provided that sets up a control target quantity by adding the initial deceleration and the control target addition quantity, so that an optimum braking deceleration corresponding to a pedal stroke is obtained regardless of the magnitude of a car deceleration in a braking operation.

Abstract: The antilock brake control apparatus has a locking symptom detector for detecting a wheel locking symptom and a removal of wheel locking symptom. A microcomputer is provided for producing a depressurization signal in response to the detection of the wheel locking symptom until the removal of the wheel locking symptom, and for calculating, after a locking symptom is detected, a pressure difference between the current wheel cylinder pressure and the wheel cylinder pressure when a locking symptom is first detected to obtain a maximum pressure difference at a time when the removal of the wheel locking symptom is detected.

Abstract: An antilock brake control system with a learning and correction function includes a slippage detector for detecting a slip value representing the slipping of a tire to a road surface. The slip value is compared with a slip threshold, and a locking symptom signal is produced when the slip value exceeds the slip threshold. A brake pressure suppression starts when the locking symptom signal is produced. A slippage learning arrangement is provided for learning, during a learning period from the start of brake pressure suppression until the tire stabilizes, whether a maximum of the slip value during the learning period is within a predetermined range, is greater than the predetermined range, or is less than the predetermined range. The slip threshold is corrected such that when the maximum slip value is greater than the predetermined range, the slip threshold is decreased, and when the maximum slip value is less than the predetermined range, the slip threshold is increased.

Abstract: A wheel speed control device in an antilock brake system prevents the wheels of a vehicle such as an automobile from locking while braking. First and second brake pressure controllers are provided in which the first is a conventional differentiation type brake pressure controller and in which the second is an integration type brake pressure controller. Thus, a state such as an excessively low slip speed resulting from insufficient brake pressure, which was difficult to detect with a differentiation type main brake pressure controller, can be detected. This makes it possible to precisely and effectively control wheel speeds by executing minor pressure increase in which the brake pressure is increased at a low rate.