Abstract: In an impedance matching circuit used in a transmitter circuit, an occurrence of a reflection wave in an antenna is suppressed.

Abstract: A mobile radio unit having all improved signal processing technique is disclosed. The unit is used in a dual-mode cellular communications system wherein analog and digital channels are used in combination. The mobile radio unit is provided with a front end whereat an incoming radio frequency signal is converted to a corresponding IF. An orthogonal detector is coupled to receive the IF signal and generates in-phase (I) and quadrature (Q) signals. These I and Q signals are respectively digitized by two analog-to-digital (A/D) converters which in turn produce I and Q digital data respectively. A digital signal processor is supplied with the I and Q digital data and demodulates the analog signal using one of the I and Q digital data when the mobile radio unit is using the analog channel while demodulating the digital channel using both the I and Q data when the unit is using the digital channel.

Abstract: A vehicle control unit comprises an interface software memory for storing an interface software program for connecting an application software program with an operating system in an internal ROM, a central processing unit for performing computation of the application software program and the interface result of computation, an I/O unit for extending the control unit, and extending means for communicating memory data through a bus of a LAN. A single-chip micro-computer is used in vehicle control.

Abstract: A power train controller and control method are provided for a passenger car driven by a combustion engine and an automatic gear changing transmission. Control sensors detect a current operating state of the passenger car. Three different modes of operation, including sports mode, economy mode, and comfortable mode are selected by the driver. Depending on the selected mode, the automobile transmission is controlled in different shifting patterns as a function of the sensed vehicle operating conditions.

Abstract: An information recording and reproducing method and apparatus with increased recording density of an information recording medium using the sample servo method driven with a fixed angular velocity from the innermost circumference to the outmost circumference. A disk-shaped recording medium is concentrically divided into a plurality of areas. Recording is performed with a recording density suited for the radial position of each of the areas. The width of the areas is set so that the recording capacity of a user data section sandwiched between servo sections forming a segment may increase with every transition to an outer adjacent area while taking one byte as a unit. The recording and reproducing apparatus has a clock generating circuit for servo data extraction and a clock generating circuit for user data extraction. The latter clock generating circuit is synchronized by a synchronizing pulse generated by the former clock generating circuit.

Abstract: A control device and a control method capable of eliminating a torque variation in changing an air/fuel ratio and establishing a compatibility of promotion in fuel economy with promotion in drivability is provided. The device includes an outer environment detector for detecting an outer environment in running a vehicle, a running environment determining device for predicting a current running environment in accordance with the outer environment, a data storage device for storing data for changing a driving characteristic, a selecting device for selecting the data, a control quantity calculator for calculating a control quantity based on the data, and a control actuator for controlling a control object.

Abstract: The distance to a target object is measured by capturing the image in front of the driving vehicle using an image sensor, identifying a target object such as a vehicle ahead to which the distance is to be measured, and projecting a laser beam onto the target object. The distance to the target object is measured by angular surveying, using an image sensor for capturing an image as a laser light detection unit.

Abstract: A control device and a control method capable of eliminating a torque variation in changing an air/fuel ratio and establishing a compatibility of promotion in fuel economy with promotion in drivability is provided. The device includes an outer environment detector for detecting an outer environment in running a vehicle, a running environment determining device for predicting a current running environment in accordance with the outer environment, a data storage device for storing data for changing a driving characteristic, a selecting device for selecting the data, a control quantity calculator for calculating a control quantity based on the data, and a control actuator for controlling a control object.

Abstract: A vehicle control unit comprises an interface software memory for storing an interface software program for connecting an application software program with an operating system in an internal ROM, a central processing unit for performing computation of the application software program and the interface software program, an erasable memory for storing data such as the result of computation, an I/O unit for extending the control unit, and extending means for communicating memory data through a bus or a LAN. A single-chip micro-computer is used in vehicle control.

Abstract: A power train controller and control method are provided for a passenger car driven by a combustion engine and an automatic gear changing transmission. Control sensors detect a current operating state of the passenger car. Three different modes of operation, including sports mode, economy mode, and comfortable mode are selected by the driver. Depending on the selected mode, the automobile transmission is controlled in different shifting patterns as a function of the sensed vehicle operating conditions.

Abstract: An automatic transmission control system for a transmission which is installed in a vehicle and whose torque converter is provided with a lockup mechanism; comprising a vehicle weight estimation device for estimating the weight of the vehicle; a gradient estimation device for estimating a gradient on which the vehicle is running; a standard lockup line selector for storing therein standard lockup lines which correspond respectively to the specified gear shift ratios of a speed change gear included in the transmission, and for selecting that one of the stored standard lockup lines which corresponds to the gear shift ratio in the present state of the vehicle; a lockup line corrector for correcting the selected standard lockup line in accordance with the estimated vehicle weight and the estimated gradient; and a lockup signal output device for deciding a timing of lockup "ON" or lockup "OFF" by the use of the corrected lockup line, and for delivering a lockup signal to the lockup mechanism (a lockup solenoid) at

Abstract: An automatic control system comprises a plurality of control processors which are connected by such transmission devices as LAN, BUS and so on. Control processing load to be executed by each of the control processors are detected and each control processor executes necessary and minimum control tasks corresponding to running state information on an automobile and carries on another control tasks in the remaining time based on the detected load of each control processor so as to smooth loads of the control processors.

Abstract: An information recording and reproducing method and apparatus with increased recording density of an information recording medium using the sample servo method driven with a fixed angular velocity from the innermost circumference to the outmost circumference. A disk-shaped recording medium is concentrically divided into a plurality of areas. Recording is performed with a recording density suited for the radial position of each of the areas. The width of the areas is set so that the recording capacity of a user data section sandwiched between servo sections forming a segment may increase with every transition to an outer adjacent area while taking one byte as a unit. The recording and reproducing apparatus has a clock generating circuit for servo data extraction and a clock generating circuit for user data extraction. The latter clock generating circuit is synchronized by a synchronizing pulse generated by the former clock generating circuit.

Abstract: Torque control method and apparatus for an internal combustion engine of a motor vehicle. A value of a desired drive shaft torque for the motor vehicle is determined on the basis of at least an accelerator pedal stroke for thereby controlling a drive shaft torque of the motor vehicle so as to assume the desired drive shaft torque value by controlling a gear ratio of a transmission gear coupling an output shaft of the engine to at least a drive shaft of the motor vehicle on the basis of the value of the desired drive shaft torque as determined. A gear ratio of the transmission gear and a flow rate of intake air fed to the engine are determined through different procedures in dependence on whether or not a torque transfer mechanism coupling the output shaft of the engine to an input shaft of the transmission gear is in a lock-up state in which the output shaft and the input shaft are coupled directly without slip.

Abstract: A control unit for vehicle is provided where an increase in a number of input/output and upgrading functions can easily be performed and, in addition to this, changing of a program in a control unit can easily be performed even when a single-chip micro-computer is used. A control unit is constructed such as to comprise an interface software memory storing an interface software program for connecting an application software program with an operating system in an internal ROM, a CPU for performing computation of the application software program and the interface software program, a RAM storing data such as the result of the computation, an I/O unit for extending the control unit, and an extending device for communicating memory data through a bus or a LAN. A single-chip micro-computer used in vehicle control can easily cope with an increase in the input/output ports or additional functions, and an application software program can continuously be used only by rewriting an interface software program.

Abstract: An intermediate frequency (IF) converter converts a received signal to an IF signal. A demodulator demodulates the IF signal to a demodulated signal and detects a phase error. A frequency error detector detects a frequency error based on the phase error. A modulated-carrier detector detects a modulated carrier component from the IF signal. When the modulated carrier component is detected, a controller achieves a frequency stabilizing operation based on the frequency error.

Abstract: An information recording and reproducing method and apparatus with increased recording density of an information recording medium using the sample servo method driven with a fixed angular velocity from the innermost circumference to the outmost circumference. A disk-shaped recording medium is concentrically divided into a plurality of areas. Recording is performed with a recording density suited for the radial position of each of the areas. The width of the areas is set so that the recording capacity of a user data section sandwiched between servo sections forming a segment may increase with every transition to an outer adjacent area while taking one byte as a unit. The recording and reproducing apparatus has a clock generating circuit for servo data extraction and a clock generating circuit for user data extraction. The latter clock generating circuit is synchronized by a synchronizing pulse generated by the former clock generating circuit.

Abstract: An automatic transmission control system for a transmission which is installed in a vehicle and whose torque converter is provided with a lockup mechanism; comprising a vehicle weight estimation device for estimating the weight of the vehicle; a gradient estimation device for estimating a gradient on which the vehicle is running; a standard lockup line selector for storing therein standard lockup lines which correspond respectively to the specified gear shift ratios of a speed change gear included in the transmission, and for selecting that one of the stored standard lockup lines which corresponds to the gear shift ratio in the present state of the vehicle; a lockup line corrector for correcting the selected standard lockup line in accordance with the estimated vehicle weight and the estimated gradient; and a lockup signal output device for deciding a timing of lockup "ON" or lockup "OFF" by the use of the corrected lockup line, and for delivering a lockup signal to the lockup mechanism (a lockup solenoid) at

Abstract: A receiver circuit for receiving both digital and analog modulated signals has a high frequency amplifier for amplifying digital and analog modulated high frequency signals, a down conversion block for converting an output signal from the high frequency amplifier into an intermediate frequency signal, a root Nyquist bandpass filter for limiting the intermediate frequency signal from the down conversion block to a frequency band based on root Nyquist characteristics, an intermediate frequency signal linear amplifier for linearly amplifying the intermediate frequency signal from the root Nyquist bandpass filter, a limiter amplifier for limiting to a constant amplitude the intermediate frequency signal from the intermediate frequency signal linear amplifier, a received signal intensity detector for detecting received signal intensity information from the intermediate frequency signal from the intermediate frequency signal linear amplifier, a synchronizing clock signal generator for generating a synchronizing clo

Abstract: A total control system for an automotive vehicle assures vehicular behavior precisely following to a driver's demand for variation of driving environment and provide smooth transition in variation of the driving environment. The system includes a driving environment index predicting section predicting vehicular driving environment on the basis of a driving operation indicative amount, such as an accelerator depression magnitude, a brake depression magnitude, a steering angular position and so forth and a vehicular condition indicative amount, such as an engine speed, a vehicle speed, a longitudinal acceleration and so forth. Based on the driving environment index derived by the predicting section, local control channels of the automotive vehicle are controlled. The driving environment index predicting section predicts the driving environment index by neural network or so forth to transfer to the local control channels though a vehicular local area network or a common memory.