摘要:
An image sensing device that outputs a signal logarithmically proportional to the intensity of the incident light. The image sensing device makes use of a sub-threshold current flowing between the drain and source of a MOS transistor when the gate voltage is below the threshold voltage (above which the MOS transistor is nominally conductive and below which nominally non-conductive). Since the logarithmic conversion is done in the photosensing section of a solid-state image sensing device, the output from the device is already compressed and is easily handled by a small capacity CCD. Some output systems for the image sensing device of the present invention are also described.
摘要:
Disclosed is a semiconductor memory device equipped with an on-chip comparison and latching function, including a latch circuit which receives a comparison result signal, output from a compare circuit receiving read data signals from plural data bus signals and an input data signal from outside and comparing whether or not the signals coincide with each other, to output the result of latching of the fail information based on a control signal. The latch circuit latches and outputs the fail information of a preset number bit output from the compare circuit during the time when a control signal for latching and outputting the fail information is in active state.
摘要:
A second roll call test mode is added in addition to a first roll call test mode for checking use/nonuse of a redundancy circuit. A semiconductor memory device is capable of confirming program states of an enable fuse and each address fuse by providing with a logic circuit which blocks program information of the enable fuse by using a second test mode signal.
摘要:
A distance measuring device includes light emitting diode for emitting light toward a subject to be photographed, and a pair of light receiving elements spaced by a predetermined base length from the light receiving diode. The light receiving elements are position side-by-side such that the boundary therebetween extends in a direction which is perpendicular to the direction of the base length so that an image formed by the light emitted to, and reflected from, the subject, will be formed on the light receiving elements in a bridged manner. The respective areas on the light receiving elements occupied by the image differ relative to the distance to the subject. A ratio between the signal levels obtained from the light receiving elements is calculated as a signal representing the distance to the subject.
摘要:
Dating information is applied to camera film from date information displaying circuitry which receives decoded electronic time signals generated by a chronometer. A first power source energizes the chronometer and a second power source energizes the decoder and display circuitry and other components such as the exposure control circuit. A monitor is provided to enable the camera operator to observe the date information. Manually operable switches are provided to independently actuate the dating apparatus and the exposure control circuit as well as to independently operate the display circuitry and the monitor.In a modified embodiment, logic and switching circuitry are provided to monitor and date either exposure data obtained from a light measuring circuit and analog/digital converter or the date information generated by the chronometer. A manually independently operable switch for actuating the display circuitry is ganged with the switching circuit to expose the date information on the film. Another switch ganged with the switching circuit enables the date information to be monitored.The display circuitry includes switches enabling the date information to be monitored independently of dating the film. One switch is actuated in timed relation with the shutter operation and manual closure of a second switch and opening of a third switch effects dating of the camera film.
摘要:
A photoelectric focus detecting member includes a semiconductor substrate of a first polarity and at least two closely transversely spaced parallel longitudinally extending photosensitive laminae of a polarity opposite to the first polarity to form corresponding photodiodes. Each of the photosensitive laminae is masked to provide regularly spaced light receiving areas alternating with masked areas, the light receiving areas of successive transversely spaced photodiodes being relatively longitudinally offset to present a checkered pattern. The detecting element is positioned in the focal plane of a lens and is either stationary or oscillated. The difference in potential between the diodes or the amplitude of the AC current in a circuit including the photodiodes is a function of the condition of focus of the lens.
摘要:
Disclosed is a semiconductor memory device equipped with an on-chip comparison and latching function, including a latch circuit which receives a comparison result signal, output from a compare circuit receiving read data signals from plural data bus signals and an input data signal from outside and comparing whether or not the signals coincide with each other, to output the result of latching of the fail information based on a control signal. The latch circuit latches and outputs the fail information of a preset number bit output from the compare circuit during the time when a control signal for latching and outputting the fail information is in active state.
摘要:
When a /RAS (/row address strobe) signal is input to a memory device, a control logic of the memory device issues an internal /RAS signal corresponding to the /RAS signal and then a row decoder drives a selected wordline in response to the internal /RAS signal. A predetermined time internal passes from the issuance of the internal /RAS signal to the drive of the selected wordline, depending upon a circuit layout of the memory device, skew and so forth. The predetermined time interval is utilized for a time of pre-booting at a booting circuit.
摘要:
A photographic camera having an automatic rangefinder system wherein a light emitter projects a beam of light through a convergent lens to illuminate a target object. This beam of light is detected through another convergent lens by one of a group of photoresponsive elements forming a light receiver. Depending upon which photoresponsive element of the light receiver detects the reflected beam of light, the range of the target object to be photographed from the photographic camera is indicated. The light emitter and the light receiver are supported by a single support member in laterally offset relation to each other and the lens elements for converging the projected beam of light and the reflected beam of light, respectively, are integrally formed of a synthetic resin. The rangefinder elements are assembled into a rangefinder module.
摘要:
An exposure indicating device for use in a photographic camera which includes a light measuring circuit for generating an output representative of scene brightness, a reference voltage circuit for producing reference voltage, a first switching circuit and a second switching circuit receiving the outputs of the light measuring and reference voltage circuits, and indicating means responsive to outputs of the first and second switching circuits. The indicating device indicates that automatically controlled exposure factor, i.e., shutter speed or diaphragm aperture, will be higher or lower with respect to more than one standards, without any change-over of switches. For example, this device indicates that shutter speed to be effected automatically will be in any of blur occurring range, available range and upper outside range.