摘要:
A three-dimensional semiconductor memory device having the object of decreasing the interconnection capacitance that necessitates electrical charge and discharge during data transfer and thus decreasing power consumption is provided with: a plurality of memory cell array chips, in which sub-banks that are the divisions of bank memory are organized and arranged to correspond to input/output bits, are stacked on a first semiconductor chip; and interchip interconnections for connecting the memory cell arrays such that corresponding input/output bits of the sub-banks are the same, these interchip interconnections being provided in a number corresponding to the number of input/output bits and passing through the memory cell array chips in the direction of stacking.
摘要:
In a three-dimensional semiconductor device in which a plurality of semiconductor circuit chips are stacked and that is provided with a plurality of interchip interconnections for signal transmission between these semiconductor circuit chips, when transmitting signals, only one interchip interconnection that serves for signal transmission is selected and other interchip interconnections are electrically isolated by means of switches that are provided between the interchip interconnections and signal lines. Interchip interconnection capacitance relating to the charge and discharge of interconnections is thus minimized.
摘要:
A semiconductor integrated circuit is disclosed for enabling faster operations than a clock frequency using multi-phase clocks, A clock generator circuit generates multi-phase clocks comprised of a plural-phase clocks which are the same in clock frequency but different in phase from one another. A clock distributor distributes the multi-phase clocks generated by the clock generator circuit within the integrated circuit. A logic circuit operates at an operating frequency higher than the clock frequency in synchronization with the multi-phase clocks generated by the clock generator circuit and distributed by the clock distributor.
摘要:
The present invention relates to a manufacturing method of a ceramic substrate used in various electronic appliances, and more particularly to a manufacturing method of a ceramic substrate forming a conductor pattern by intaglio printing. A conductive paste is supplied in the intaglio by using any one of screen mask, metal mask, or drawing device, and therefore the conductive paste can be supplied uniformly in desired positions only. The supplying amount of the conductive paste can be adjusted by repeating printing, so that an optimum amount can be set depending on the pattern. As a result, a fine wiring pattern of thick film can be easily formed, and a ceramic circuit board low in wiring resistance, high in wiring density, and high in dimensional precision of wiring pattern can be obtained.
摘要:
A variable delay section comprises a gate element and a plurality of (N) delay elements for delaying the signal change on the output of the gate element. A difference between a first delay provided by n-th delay section and a second delay provided by (n+1)th delay section is constant for any of n's between 1 and N−1. A plurality of variable delay sections are cascaded to form a frequency multiplier, with the output of the last stage variable delay section being fed-back to the input of the first stage variable delay section through a selector. The other input of the selector is connected to the input of the variable delay circuit to allow the internal signal to pass the variable delay sections for K times.
摘要:
A signal value representing method in which both wide dynamic range and high precision can be realized in combination with a low power source voltage. M+1 signal lines are used of which, M signal lines are digital signal values and one signal line is an analog signal value. The range of the values represented by the analog signal value representing method is equated to the smallest value of the digital signal value representing method. The signal value is represented by the combination of a discretely changing wide dynamic range signal, represented by the digital signal value representing method employing M signal lines and a continuously variable high precision signal which is represented by the analog signal value representing method employing a sole signal line and which represents a signal level position within the interval of the discrete values.
摘要:
A level converting circuit includes a first power supply line of a high potential, a second power supply line of a low potential, a third power supply line of a potential lower than that of the first power supply line by some degree, and a first internal power supply line. The level converting circuit also includes an inverter circuit configured to output an output potential equal to that of the second power supply line when an input signal is equal to a potential of the third power supply line, and another output potential equal to that of the first power supply line when the input signal is equal to a potential of the second power supply line. Furthermore, the level converting circuit includes a switch circuit for supplying to the first internal power supply line the potential of the third power supply line when the input signal is equal to a potential of the third power supply line, and the potential of the first power supply line when the input signal is equal to the potential of the second power supply line.
摘要:
A horizontal synchronizing signal is counted by a binary counter. A first switch is switched in response to the count value, whereby signal data is classified. A sampling clock signal is counted by a binary counter. An output of the first switch is switched by second and third switches in response to the count value, whereby the data input rate of signal data is reduced. Each classified signal is subjected to filtering by a two-dimensional FIR digital filter.
摘要:
The present invention is suitable for examination of the rotating state of a Polygonal mirror motor in an image forming apparatus. It is judged whether or not the rotational speed of the motor is a target speed until a first time period has elapsed since the supply of power to the motor for rotating a Polygonal mirror was started every other second time period sufficiently shorter than the first time period and continuously checked over a third time period which is sufficiently shorter than the second time period. If it is judged that the rotational speed of the motor is the target speed continuously for the third time period, it is judged again whether or not the rotational speed of the motor is the target speed after an elapse of a fourth time period since the judgment. If the rotational speed of the motor is the target speed, the motor outputs a signal indicating that the motor is stabilized at the target speed. If the rotational speed of the motor is not the target speed, the motor further waits until a fifth time period has elapsed for judging whether or not the rotational speed of the motor is the target speed. If the rotational speed of the motor is the target speed, the motor outputs a signal indicating that the motor is stabilized at the target speed. Image formation processing is performed in response to the signal indicating that the motor is stabilized at the target speed.
摘要:
A paper feeding device for a paper cassette of an image processing apparatus. The paper cassette is mounted at a specific position or the image processing apparatus in a manner permitting the cassette to be pulled out. A preliminary feed roller feeds the paper on the paper cassette toward a feed roller which is normally energized in a paper pressing direction. When the paper cassette is mounted in the image processing apparatus, the document setting board disposed in the paper cassette is upwardly turned by a pressing mechanism. When the paper cassette is pulled out, the feed roller from the paper cassette is turned in reverse direction. A feed channel to guide the paper from the paper cassette is formed in a curved manner, and a normally turned delivery roller is provided inside the curved channel.