摘要:
A testing integrated circuit for a semiconductor chip, having an integrated circuit, includes a selector, provided in the integrated circuit of the semiconductor chip, for selecting one of a first set of signals supplied from external portions of the semiconductor chip and a second set of signals used for measuring voltages at respective predetermined portions in an internal circuit of the semiconductor chip. The first set of signals is converted from analog to digital signals during a normal operation of the semiconductor chip. An analog-to-digital converter provided in the integrated circuit receives an analog signal output from the selector and produces a digital signal. A plurality of output pads disposed in the semiconductor chip transmits the digital signal from the analog-to-digital converter to the external portions. The output pads correspond to a bit quantity of the analog-to-digital converter.
摘要:
A testing integrated circuit using an A/D converter provided in an integrated circuit on a semiconductor chip. A selector is provided for selecting either an external signal supplied from an external portion of the chip or an internal signal generated by an internal circuit of the chip, and for outputting the selected signal. The A/D converter, which receives an output from the selector, is normally used for A/D-converting an external signal. During reliability test, the A/D converter receives a signal to measure a voltage from the internal portion of the chip, and A/D-converts the received signal. An output pad which transmits the output of the A/D converter to the external portion is also used as a general output pad. The general output pad is employed to A/D-convert the external signal.
摘要:
A sheet feeding device includes a cassette in which recording media are configured to be stacked. The cassette includes a rear end regulation member configured to be moved in a direction in which the recording media are fed to regulate rear ends of the recording media and a size detection device configured to swing with movement of the rear end regulation member. The sheet feeding device further includes a size determination device arranged within an area corresponding to a width of the cassette in the direction in which the recording media are fed. The size determination device is configured to determine a size of the recording media stacked in the cassette by detecting a position of the size detection device.
摘要:
A tool grinding machine which can grind the cutting edge of a punch without disassembling the punch body from the punch assembly and further can grind the cutting edge of the upper surface shoulder portion of the die. Further, the punch and die of various shapes can be ground easily by selecting an appropriate previously stored operation mode determined according to grinding conditions. The tool grinding machine includes a rotary table 33 rotatably disposed on a slider 29 supported on a base 3 movable in the right and left direction; and a grinding tool 53 disposed axially away from the rotary table and rotatable and movable in an axial direction of the rotary table 33, for grinding workpiece fitted on the rotary table 33.
摘要:
Detector circuitry monitors the line voltage on a telephone line to detect an off-hook condition. In order to accomodate varying line voltages and noise conditions, the circuitry automatically selects a threshold off-hook voltage by an iterative initialization procedure which is initiated on circuit power-up. The intialization procedure repeatedly compares the threshold voltage to the actual line voltage over a period of time to eliminate false off-hook detection due to noise.
摘要:
A sheet conveying device for an image forming apparatus of the present invention includes a cover hinged to the casing of the apparatus and supporting a roller shaft on which a drive roller is mounted. A driven roller and a positioning section for positioning the drive roller are mounted on the casing. The cover is movable between a closed position where the drive roller is pressed against the driven roller and an open position where the former is released from the latter. A first drive gear is affixed to the end of the roller shaft while a second drive gear, meshing with the first drive gear, is mounted on the cover and receives the output torque of a drive source. The roller shaft is mounted on the cover such that the pitch circle of the first drive gear moves on the pitch circle of the second drive gear while touching it externally.
摘要:
In synchronization of a conventional AV system, when a stream as the master stops, a system clock cannot be corrected for synchronization. Since the correction is consistently performed even when an error is small, overhead of correction is large. On the other hand, when an error is large, sharp correction causes a feeling that something wrong. In the present invention, when the stream as the master stops, previously registering the degree of priority regarding the master, consideration of a corrected period or a previous error for the system clock, or transmitting a stream containing information regarding the master can allow for other process to serves as the master. Accordingly, it is possible to provide a method for synchronization with maintaining correction of the system clock. When a corrected error is large, gradual correction or reference can provide a system with normal feeling. Furthermore, when an error of correction is small, omission of correction or reference can provide a system with less overhead.
摘要:
A bus line drive circuit comprising a bus line allowing data to transfer therethrough, a precharge circuit connected to the bus line for precharging the bus line with precharge pulse, input/output circuit connected to the bus line for transferring data to and from an ALU through the bus line, and positive feedback circuit connected to the bus line, which exhibits a high impedance during a precharge period to electrically be disconnected from the bus line, keeps a precharge potential when the potential on the bus line is equal to the precharge potential during an active period, and expands a potential difference when the potential on the bus line is slightly different from the precharge potential.
摘要:
A sheet feeding device includes a cassette configured to accommodate recording media, and a recording media feeding member configured to feed out the recording media accommodated in the cassette. The cassette includes a tray main body part including a stacking plate configured to have the recording media stacked thereon, and a recording media conveying guide part configured to detachably connect to the tray main body part. The recording media conveying guide part includes a raising member configured to raise the stacking plate toward the recording media feeding member, and a raising and lowering member connected to the raising member and configured to raise and lower the stacking plate.
摘要:
A sheet cassette includes a tray main body part, and a tray expansion/contraction part supported by the tray main body part and configured to slide relative to the tray main body part to a cassette expanded position where the sheet cassette is in an expanded state and a cassette contracted position where the sheet cassette is in a contracted state. The tray expansion/contraction part includes a rear end regulation member configured to be moved in a direction in which recording media stacked in the sheet cassette are fed to regulate rear ends of the recording media and a sliding guide part configured to support the rear end regulation member to freely slide and forming a moving path of the rear end regulation member.