Abstract: A radar apparatus is provided in which an antenna axis and vehicle axis can agree with each other even when the antenna face is covered with a cover. In an assembling process of the radar apparatus composed of a chassis, an antenna incorporated in the chassis and a cover attached to the chassis to cover the antenna, a correlative positional relation between an antenna axis of the antenna incorporated into the chassis and one portion of the chassis or bracket is detected, and the thus detected data is inscribed on a seal and the seal is stuck to the chassis or the data is stored in an internal memory, and the chassis into which the antenna is incorporated is covered with the cover, so that the radar apparatus is manufactured. When this radar apparatus is attached to a vehicle, the antenna axis can be adjusted parallel to the vehicle axis by utilizing data of a correlative positional relation between the antenna and one portion of the chassis or bracket.

Abstract: A radar apparatus is provided in which an antenna axis and vehicle axis can agree with each other even when the antenna face is covered with a cover. In an assembling process of the radar apparatus composed of a chassis, an antenna incorporated in the chassis and a cover attached to the chassis to cover the antenna, a correlative positional relation between an antenna axis of the antenna incorporated into the chassis and one portion of the chassis or bracket is detected, and the thus detected data is inscribed on a seal and the seal is stuck to the chassis or the data is stored in an internal memory, and the chassis into which the antenna is incorporated is covered with the cover, so that the radar apparatus is manufactured. When this radar apparatus is attached to a vehicle, the antenna axis can be adjusted parallel to the vehicle axis by utilizing data of a correlative positional relation between the antenna and one portion of the chassis or bracket.

Abstract: By mounting electronic circuit components using a microstrip line, transmission loss and variation in performance are reduced. At least one projection of substantially uniform height is provided on each of four side surfaces of the components. The components are disposed on the chassis by bringing their projections into contact with adjacent circuit components. A heat-resistant film or a heat-resistant tape is adhered to one or both side surfaces of adjacent side surfaces of the components, to dispose the components in contact with each other. A component-mounting nozzle is used to adsorb the components, and position them on the chassis in contact with a guide fitted on the chassis or in the vicinity of the chassis. It is also possible to position the components with actuators located around the chassis, after the components are provisionally disposed on the chassis with the component-mounting nozzle.

Abstract: By addition of a polyamide resin, which is compatible with rosin-based resins as the main components of liquid flux and solder paste flux, which is resistant to temperature variation and provides a damp proofing effect, and particularly a polyamide resin which is obtained by polycondensation reaction of a dicarboxylic acid of 2 to 21 carbon atoms and a diamine and has a softening point of 80.degree. to 150.degree. C., or a polyamide resin which is obtained by polycondensation reaction of a dimer acid and a diamine and has a softening point of 80.degree. to 150.degree. C., highly reliable low-viscosity liquid fluxes and solder paste fluxes, with which solderability is not impaired, where the flux residues on printed circuit boards after soldering undergoes no cracking or deterioration even under temperature variation, and which prevent poor insulation and migration even under high humidity environment, are provided.

Abstract: This invention relates to a keyboard input coding device comprising a counter for counting ON and OFF duration of signals obtained by pushing a keyboard, an encoder for producing codes of musical interval corresponding to keys of the keyboard, a note-length discriminating circuit for taking count values from the counter based on signals from the keyboard and discriminating a note-length, a note-length memory circuit for receiving or supplying the note-length data from or to the note-length discriminating circuit, a reference time generating circuit for supplying the note-length discriminating circuit with data of partitioning a musical section and a processing control circuit, wherein the discrimination of the note-length is effected by referring to the note-length between sequential notes according to data stored in the memory circuit, thereby a musical note with a note-length to agree well with intention of an operator is coded after correcting the key input duration data according to estimates made from th

Abstract: Ignition timing control for an internal combustion engine is achieved by sensing engine rotation so as to generate output pulses for predetermined degrees of rotation and to develop a reset pulse at a rotational reference position. A first digital signal representing rotational speed of the engine and a second digital signal representing engine intake vacuum are converted into output date representative of optimum retard angles from the reference position. The output date are added to generate a plural bit binary signal having higher and lower significant bits. Comparison means, responsive to the reset pulse, counts the output pulses representing degrees of engine rotation and generates an output signal when the count reaches the value of the higher significant bits.

Abstract: A logarithmic function generating system which generates an output signal bearing a logarithmic functional relation to the input signal. The time constant RC of a resistance-capacitance circuit is increased for every unit time elapsed in proportion to the unit time to produce a broken line approximating the logarithmic function. With its simple circuit construction employing no elements whose characteristics vary with ambient temperature changes or which tend to involve variations in characteristics among the elements of the same type, the system is capable of generating the desired logarithmic function output with a high degree of accuracy.

Abstract: There is provided an electronically controlled fuel injection system wherein a constant presetting circuit generates a proportionality constant signal having a frequency corresponding to a proportionality constant, an intake-air amount detecting circuit generates a binary coded signal corresponding to the amount of air drawn into an internal combustion engine, and a multiplier circuit multiplies the proportionality constant signal by this binary coded signal and generates an output signal having a frequency corresponding to the product of the two signals. On the other hand, an engine revolution detecting circuit generates an engine revolution signal having a pulse width inversely proportional to the number of revolutions of the engine, and the number of multiple signals generated from the multiplier circuit during the pulse width of the engine revolution signal is counted to generate a binary coded signal representing the fuel injection quantity required by the engine.

Abstract: A digital logarithmic function generator comprising a converter circuit for producing an output signal which is proportional to the number of input signals, a setting circuit the content n of which is changed each time the output voltage of said converter circuit changes by a fixed amount Vo, and a modulator circuit for frequency modulating a clock signal train of a constant frequency with said content n to produce an output signal train the period of which varies proportionally with 2.sup.nVo, the output signal train of said modulator circuit being applied to said converter circuit as the input signal thereto. The present digital logarithmic function generator is useful in various control systems, such as an electronically controlled fuel injection system, in which an electrical signal which is logarithmically related to time is required.

Abstract: A fuel injection controlling system for an internal combustion engine comprising an oscillator circuit for generating clock pulses having a frequency corresponding to the air-to-fuel ratio of the mixture, a first detecting circuit for generating pulse signals having a time width corresponding to the rate of air flow to the engine, a first multiplier circuit for generating an output corresponding to the product of the air-to-fuel ratio and the rate of air flow in a binary coded form, a second detecting circuit for generating signals having a pulse width proportional to the rotational speed of the engine, a second multiplier circuit for generating an output corresponding to the product of the air-to-fuel ratio and the rate of air flow and the rotational speed of the engine in a binary coded form, and a conversion circuits for generating pulse signals each corresponding to the output of the second multiplier circuit, whereby fuel injection valves are actuated by the output of the conversion circuit.

Abstract: A digital hyperbolic function generator comprises a frequency dividing circuit for frequency dividing first clock signals of a fixed frequency to produce second clock signals for each fixed time interval, a setting circuit for changing the setting thereof in correspondence to the number n of said second clock signals, said setting being produced in a binary code, a modulating circuit for frequency modulating said first clock signals with said setting to produce third clock signals the period of which is proportional to ##EQU1## AND A CONVERTER CIRCUIT FOR PRODUCING A VOLTAGE CORRESPONDING TO THE NUMBER OF SAID THIRD CLOCK SIGNALS. The digital hyperbolic function generator thus constructed generates a hyperbolic function of polygonal line approximation the gradient of which changes for each fixed time interval with a high accuracy, and the operation thereof is stabilized against the change in ambient temperature because the circuits are constructed by digital elements.