Abstract: A variable delay circuit includes a load on a signal transfer line, at least one transistor connected to the signal transfer line. Each transistor is controlled by a gate voltage thereof so that a signal on the signal transfer line is delayed in response to a magnitude of the gate capacitance connected thereto.

Abstract: In the present invention, an external power source supplied to an integrated circuit device is divided into a first external power source for the DLL circuit and a second external power source for circuits other than the DLL circuit. According to the present invention, it is arranged that power source noise generated in the second external power source cannot be transmitted to the variable delay circuit by utilizing the first external power source preferably for the variable delay circuit of the DLL circuit and even more preferably for its delay unit. Also, preferably, it is arranged that power source noise generated in the second external power source cannot be transmitted to the phase coincidence detection unit by utilizing the first power source for the phase coincidence detection unit in the phase comparison circuit of the DLL circuit.

Abstract: A variable delay circuit includes a load on a signal transfer line, at least one transistor connected in parallel with the signal transfer line. Each transistor is controlled by a gate voltage thereof so that a signal on the signal transfer line is delayed in response to a magnitude of the gate capacitance connected thereto.

Abstract: The present invention is an integrated circuit device having a self timing control circuit for generating an input loading timing signal whose phase is adjusted with an external clock, where loading of input signals supplied from outside, such as a command input signal, address input signal and data input signal, to internal circuits is forbidden when the self timing control circuit is adjusting phase. And when the self timing control circuit finishes adjusting the phase to a certain degree, the loading operation of an input signal at the input circuit using the input loading timing signal is enabled. To execute such an operation, the input circuit generates an input loading control signal based on a lock-on signal or adjustment signal of the DLL circuit, or based on an input stop cancellation signal, for example. The input circuit controls the stop and restart of loading of the input signal according to this input loading control signal.

Abstract: A variable delay circuit includes a load on a signal transfer line, at least one transistor connected to the signal transfer line. Each transistor is controlled by a gate voltage thereof so that a signal on the signal transfer line is delayed in response to a magnitude of the gate capacitance connected thereto.

Abstract: A focus detecting system is provided with a non-destructive type photoelectric conversion element array, an A/D converter for converting the analog output of the photoelectric conversion element array into a corresponding digital value, and a focus-detecting arithmetic circuit for performing arithmetic operations upon the distance to an object on the basis of the digital value output from the A/D converter. In the focus detecting system, when a predetermined initial integration period elapses after the storage of the electric charge has been started, a sequence of in-focus-state detecting operations comprising the steps of effecting non-destructive readout of the output of the photoelectric conversion element array, performing A/D conversion of the readout output and performing arithmetic operations for focus detection is repeatedly executed so that focus detection is effected.

Abstract: A spark ignition timing control system for an automotive vehicle internal combustion engine utilizes a first sensor for detecting engine speed, a second sensor for detecting engine knocking and a third sensor for detecting transmission upshifting. The control system operates in response to the first, second and third signals to retard the spark advance angle to reduce knocking due to change in engine speed upon engine upshift.

Abstract: In an evaporative emission control system of a motor vehicle, a two way valve is provided for connecting the canister with the air-fuel mixture intake tube of the engine when assuming a first position and connecting the canister with the clean side of the air cleaner when assuming a second position. The two way valve assumes the first position when the interior condition of the fuel tank does not tend to saturate the vapor adsorbing power of the canister, and assumes the second position when the interior condition of the fuel tank tends to saturate the vapor adsorbing power of the canister.

Abstract: A carburetor for an internal combustion engine includes a power boost device for boosting engine output during acceleration or at high speeds which adjusts its air-fuel ratio and/or boost timing according to the alcohol content of the fuel. The power device includes a nitrile rubber swelling member which swells in accordance with fuel alcohol content and which is used to adjust the fuel flow aperture of a power jet. In addition, a second swelling member can be used as a linkage between an intake manifold-vacuum-responsive piston and a metering valve to adjust the timing or threshold vacuum level at which the metering valve begins to operate.

Abstract: A fuel supply system for an injection-type internal combustion engine using a gasoline or alcohol blended gasoline as a fuel. In addition to a conventional fuel supply system there is provided a fuel temperature detector which detects and signals the fuel temperature increases and exceeds a predetermined value and a fuel pressure regulating means responsive to the fuel temperature detector for raising the fuel pressure within the fuel supply line applied to each fuel injector above a constant value regulated according to the pressure difference between the fuel pressure within the fuel supply line and the intake manifold vacuum pressure so as to prevent the fuel supply line from being clogged due to the occurrence of vapor lock at the time when the engine is started at a high fuel temperature or when the engine runs at a low speed under a high fuel temperature.

Abstract: An apparatus for detecting an in-focused condition of optical systems by using two values of indices of performance each derived from the number of differences between illumination signals obtained per picture element, comprising first and second image sensors arranged in front of and in the rear of a focal plane of the optical system, first and second analog data processing circuits, and a comparing means.

Abstract: A reversed image sensing apparatus comprising an image sensor composed of a charge transfer element including photosensitive elements arranged in a picture element unit, an optical system including a focusing lens and a light source and focusing an image recorded on a recording medium onto said image sensor, a voltage inverting circuit operative to receive the output video signal from said image sensor and produce a reversed video signal, a photosensitive element operative to detect the brightness of said light source, and a compensating circuit operative to automatically correct said reversed video signal on the basis of the brightness signal delivered from said photosensitive element in response to charge in said light source.

Abstract: An apparatus for detecting the in-focusing conditions for use in an optical machinery such as cameras, microscopes or endoscopes is disclosed. The apparatus comprises a light receiver arranged with an angle of inclination against an image surface of an optical system and consisting of a plurality of charge transfer elements aligned as a picture element array; means for deriving illuminance signals from the picture element array of the light receiver and means for treating the illuminance signals to detect the in-focused position of the optical system.

Abstract: A photometric system for use in an image pick-up device is disclosed. The photometric system comprises the steps of forming an image focussed by a camera lens system on a light receiver consisting of a plurality of charge transfer elements arranged in a picture element array; selectively deriving luminance signals of amplitude having a value within a range of about .+-.2 exposure values around a reference exposure value corresponding to a mean value between a maximum value and a minimum value of the amplitude of the luminance signals; and seeking a mean value of the selected luminance signals to photometrically measure the light of automatically selected portions on the average.

Abstract: An apparatus for detecting the in-focusing conditions is disclosed. The apparatus comprises a light guide member having light incident end arranged along a plane which is placed at an angle of inclination against a predetermined focal plane of an optical system; a light receiver arranged near a light outlet end of the light guide member and consisting of a plurality of charge transfer elements arranged to receive light from the outlet end as a picture element array; means for deriving illuminance signals from the picture element array of the light receiver; and means for treating the illuminance signals to detect the in-focused position of the optical system.

Abstract: A projection apparatus for optical systems such as a projection type microscope or the like, which is adapted to project an image of a sample disposed on a movable stage onto a television monitor screen and display it thereon, and which comprises an image sensor composed of a charge transfer element including photosensitive elements aligned with a picture element and operative to receive the image of the sample to be projected; a driving circuit for scanning the image sensor; a television monitor for displaying a video signal obtained from the image sensor when it is scanned by the driving circuit; a memory device for storing the television signal; a stage movement detecting circuit for detecting the movement of the stage; a timer circuit for generating a signal everytime a given time elapses; and a drive control circuit device, when the stage is moving, becomes operative to operate the driving circuit on the basis of the output from the stage movement detecting circuit so as to scan the image sensor everytim

Abstract: A torch ignition type internal combustion engine has therein a main combustion chamber and an auxiliary combustion chamber which chambers are individually communicable with a common carburetor through a main intake valve and an auxiliary intake valve, respectively. The opening timing of the auxiliary intake valve is so controlled to be later than that of the main intake valve.