摘要:
A storage device for storing photographic exposure information employs a closed-loop analog-to-digital (A-D) converter circuit includes a counter and a digital-to-analog (D-A) converter. The influence of erroneous signals which are created at the output of the D-A converter when the exposure information is stored in the counter is eliminated. The D-A converter circuit employs a ladder network of coarse accuracy. The stored exposure value, however, is highly accurate because of the closed-loop nature of the A-D converter circuit. Means responsive to the stored value for operating the exposure system of the camera are disclosed.
摘要:
A device and method for reducing phase jitter in digital phase locked loop applications resulting in smaller clock skews between application specific integrated circuits (ASICs). Phase jitter is reduced by a fine resolution digital delay line (20) comprising both coarse stages (variable delay element 24) for rough/fast phase adjustment and fine stages (fine resolution delay element 22) for precise delay adjustment when phase lock is near.
摘要:
A device and method for reducing phase jitter in digital phase locked loop applications resulting in smaller clock skews between application specific integrated circuits (ASICs). Phase jitter is reduced by a fine resolution digital delay line (20) comprising both coarse stages (variable delay element 24) for rough/fast phase adjustment and fine stages (fine resolution delay element 22) for precise delay adjustment when phase lock is near.
摘要:
A first periodic digital waveform is to be synchronized with a second periodic digital waveform obtained by propagating the first waveform through a delay path (13) having an adjustable propagation delay. In the disclosed approach, the delay of the delay path is increased, even when an edge (43) of the second waveform trails a corresponding edge (45) of the first waveform by less than one-half cycle. The delay continues to be increased until the edge of the second waveform is eventually time-shifted past the next successive corresponding edge (49) of the first waveform.
摘要:
A removable hard disk drive storage system includes a data storage cartridge having a write protect switch, and a reader configured to couple to and read data from the data storage cartridge. The reader includes a physical block that aligns with the write protect switch of the data storage cartridge. The physical block aligns with the write protect switch of the data storage cartridge to prevent the reader from coupling to the data storage cartridge when the write protect switch is in a write protect position.
摘要:
A removable hard disk drive storage system includes a data storage cartridge having a write protect switch, and a reader configured to couple to and read data from the data storage cartridge. The reader includes a physical block that aligns with the write protect switch of the data storage cartridge. The physical block aligns with the write protect switch of the data storage cartridge to prevent the reader from coupling to the data storage cartridge when the write protect switch is in a write protect position.
摘要:
A field configurable vehicle armoring system and associated method allow a user to retrofit and reconfigure a combination of armor components in response to a perceived threat change and using original equipment manufacture fasteners and holes. The system includes pillar armor attachable after an original equipment manufacture door and hinge are removed. Fasteners extend through the hinge of the armored door, the pillar armor and an original equipment manufacture pillar using holes other than the original equipment manufacture holes. Rocker panel and underbody armor is further provided, along with a ballistic resistant windscreen and rear wall armor. Where desired, system armor includes a composite plate comprising a strike face that is constructed from softer metallic material than an inner metallic sheet.
摘要:
A field configurable vehicle armoring system and associated method allow a user to retrofit and reconfigure a combination of armor components in response to a perceived threat change and using original equipment manufacture fasteners and holes. The system includes pillar armor attachable after an original equipment manufacture door and hinge are removed. Fasteners extend through the hinge of the armored door, the pillar armor and an original equipment manufacture pillar using holes other than the original equipment manufacture holes. Rocker panel and underbody armor is further provided, along with a ballistic resistant windscreen and rear wall armor. Where desired, system armor includes a composite plate comprising a strike face that is constructed from softer metallic material than an inner metallic sheet.
摘要:
A tape reel assembly including a hub, opposing upper and lower flanges, a plurality of reel teeth, and three engagement features. The opposing upper and lower flanges extend in a radial fashion from opposing sides of the hub. The reel teeth extend axially outwardly relative to the hub. The three engagement features are equidistantly spaced within the reel teeth and are configured to provide a dominant mating surface relative to surfaces of the plurality of reel teeth. With this configuration, the three engagement features mate with teeth of the tape drive clutch, and prevent meshed engagement with the remaining reel teeth. Thus, the three engagement features dictate the plane of contact between the tape reel assembly and the drive clutch, with the reel teeth serving as general guide surfaces that facilitate this interaction. The engagement features can be pronounced drive teeth or reduced-sized valleys.
摘要:
A flip-flop includes a data storage node for driving an inverter (62) and transfer gate (64) combination to transfer data stored on the data node (60) to a master storage node (66). A master cross-coupled latch (68) has two cross-coupled inverters (72) and (74) connected thereto such that the master storage node (66) is only connected to one side of the latch (68). The data node (66) directly drives a slave stage comprised of an inverter (76) and transfer gate (78) which in turn drives a slave storage node (80). The slave storage node (80) is connected to a slave cross-coupled latch (82) comprised of cross-coupled inverters (86) and (88). The slave storage node (80) comprises the Q-output of the inverter. The data is transferred to storage node (66) on the negative going edge of the clock signal and latched thereto on the positive going edge of the clock signal. ON the positive going edge of the clock signal, data is transferred from the storage node (66) to the slave storage node (80) and then latched in the latch (82) on the negative going edge of the clock signal. This results in a minimum number of inverters, thus decreasing the Clock-to-Q time.