Abstract: The present invention relates to a complementary transistor circuit and, an amplifier using it, and in particular, to a video amplifier for amplifying video signals and a high-definition CRT display device. In amplifying inputted video signals by using a multiplexer, a gain controller and a current mirror amplifier, each element circuit is formed by using complementary transistor circuits. Circuit simplification is thus attained. In addition, higher precision and band broadening has been realized owing to adoption of a current operation. Further, the present invention makes it possible to eliminate direct from the high voltage output completely by providing a low-voltage output circuit for feedback having a similar relationship with respect to the high-voltage video output stage of the video amplifier, thereby performing negative feedback via a sample-and-hold circuit. This also serves to broaden the bandwidth and reduce power dissipation.

Abstract: The present invention relates to a complementary transistor circuit and an amplifier using it, and, in particular, to a video amplifier for amplifying video signals and a high-definition CRT display device. In amplifying inputted video signals by using a multiplexer, a gain controller and a current mirror amplifier, each element circuit is formed by using complementary transistor circuits. Circuit simplification is thus attained. In addition, higher precision and band broadening has been realized owing to adoption of a current operation. Further, the present invention makes it possible to eliminate direct feedback from the high voltage output completely by providing a low-voltage output circuit for feedback having a similar relationship with respect to the high-voltage video output stage of the video amplifier, thereby performing negative feedback via a sample-and-hold circuit. This also serves to broaden the bandwidth and reduce power dissipation.

Abstract: Disclosed is a roller offset printing apparatus which comprises image sensors 14 and 15 disposed on a linear stage 4, and position correction motors 8 to 13 disposed in the respective peripheries of a master plate 6 and a work plate 7, wherein positions of the master plate 6 and the work plate 7 on the linear stage 4 are detected by the image sensors 14 and 15 so that the respective positions of the master plate 6 and the work plate 7 are corrected by the motors 8 to 13 in accordance with the quantities of displacement when there is any displacement between the detected positions and reference positions. After correction, the linear stage 4 and a roller transfer drum 1 are moved while being synchronized with each other to thereby perform transfer. As a result, accuracy in positioning of the master plate and the work plate on the linear stage is improved, so that good superposition printing is provided.

Abstract: A CRT display unit provides for reduced electromagnetic radiation emission by encasing a video amplifier for amplifying image signals sent from a computer and a CRT device for displaying the amplified image signals within a chassis; coating conductive films on the external and internal surfaces of the funnel section of the CRT envelope; covering the circumference of the panel section with a metal rim band; fastening the envelope to the chassis via metal fixtures installed on the rim band; electrically connecting the conductive film coated on the external surface to the rim band by means of a first conductive member; and electrically connecting the space between the rim band on the panel section fastened to the chassis via metal fixtures and the chassis using a second conductive member.

Abstract: A roller offset printing apparatus comprising: a linear stage movable forwards and backwards; a stage driving means for driving said linear stage; a master plate and a work plate disposed at a predetermined interval on said linear stage, said master plate having ink pits reserving ink; a roller transfer drum supported rotatably; a roller transfer drum driving means for driving said roller transfer drum so that said roller transfer drum rotates on the surface of said master plate to transfer the ink in said ink pits of said master plate onto the outer circumferential surface of said roller transfer drum and said roller transfer drum further rotates on a surface of said work plate to thereby transfer the ink from the outer circumferential surface of said roller transfer drum onto the surface of said work plate; a rotation force transmission control means for controlling on/off of transmission of rotation force from said roller transfer drum driving means to said roller transfer drum; a rotation angle detection

Abstract: Herein disclosed are an amplifier and a display which uses the former. The amplifier includes a current amplifying circuit for sending out an amplified output current varying according to an input signal, and a current-voltage converting circuit for converting the output current of the current amplifying circuit into a voltage thereby to generate a high output voltage in response to the input signal. The supply voltage V.sub.cc1 of the current amplifying means and the supply voltage V.sub.cc2 of the current-voltage converting means are set separately of each other to have a relationship of V.sub.cc1 <V.sub.cc2. Thus, a high output voltage can be obtained from the current-voltage converting circuit without the need for the current amplifying means to have high breakdown voltage elements.

Abstract: Herein disclosed are an amplifier and a display which uses the former. The amplifier includes a current amplifying circuit for sending out an amplified output current varying according to an input signal, and a current-voltage converting circuit for converting the output current of the current amplifying circuit into a voltage thereby to generate a high output voltage in response to the input signal. The supply voltage V.sub.cc1 of the current amplifying means and the supply voltage V.sub.cc2 of the current-voltage converting means are set separately of each other to have a relationship of V.sub.cc1 <V.sub.cc2. Thus, a high output voltage can be obtained from the current-voltage converting circuit without the need for the current amplifying means to have high breakdown voltage elements.

Abstract: A CRT picture display apparatus of the raster scan type comprises a cathode ray tube for raster scanning, a horizontal deflection circuit for supplying a horizontal deflection current to a horizontal deflection coil of the CRT, a vertical deflection circuit for supplying a vertical deflection current to a vertical deflection coil of the CRT, and a display data generator for supplying data to be displayed to the CRT.

Abstract: A dual memory system consists of two memory units each having volatile memory devices, backup power storage means and backup monitoring facility which memorizes a signal indicative of whether backup is successful or failing. When the contents of one memory unit are copied to another memory unit, the receiving memory unit has the monitor signal in a state which is made coincident with the signal state of the sending memory unit. Consequently, the receiving memory unit will have the same state of the monitor signal as of the sending memory unit at the end of copying, and thus both memory units are in a successful backup state only when the sending memory unit is in a successful backup state.

Abstract: A connecting mechanism of an XY table is provided with a first table movable in one direction, a second table movable relative to the first table in a direction perpendicular thereto and having a guide rail parallel to the direction of movement of the first table, an auxiliary slide movable parallel to the direction of movement of the second table, a first support shaft fixed to the auxiliary slide, a second support shaft rotatably supported by the auxiliary slide and having an eccentric portion, a first antifriction bearing supported by the first support shaft, a second antifriction bearing supported by the eccentric portion of the second support shaft, and biasing means for biasing the second support shaft in a rotational direction. The guide rail is sandwiched between the first antifriction bearing and the second antifriction bearing biased in the direction of movement of the second table by the biasing means.

Abstract: In a convergence distortion correction method and apparatus for raster-scanned color CRT having a dynamic convergence magnet assembly, the CRT display screen is divided into a plurality of zones. A digital memory is provided with a data storage field and a flag bit field at each address. Addresses of the zones are generated by means of a sync signal regenerated from an input video signal. First, the addresses of zones to be subjected to the adjustment of convergence distortion are selected to set flags in the flag bit fields of the digital memory at its addresses specified by the selected zone addresses. Then, by referring to the flags, guide patterns are displayed on the selected zones and are used to adjust the convergence distortions in those zones. Preferably, one of the displayed guide patterns is flickered. Correction data based on the results of the adjustment are stored in the data storage fields of the digital memory at the corresponding addresses.