摘要:
A laser drive integrated circuit and an optical disk apparatus using the laser drive integrated circuit for forming high-density marks. The optical disk apparatus has a drive waveform information storage unit for storing at least one information of the drive waveform for driving a laser diode in response to a binary recording signal recorded in a recording medium and a drive waveform decoder for decoding the drive waveform based on the information stored in the drive waveform information storage unit. The recording strategy can be changed in accordance with the variations and fluctuations of recording media or the characteristics of the recording media, while at the same time reducing the number of signal lines of flexible wiring and alleviating the effect of the signal distortion.
摘要:
An image-forming apparatus adjusts the running state of a belt by displacing one of the rolls supporting an endless belt, wherein the roll is displaced to prevent the belt from being twisted by a change in the tension of the endless belt that stems from the operation for displacing the roll. When the image-forming apparatus is provided with a belt running adjusting mechanism 20 which adjusts the running state of the endless belt 21 by displacing one (drive roll 22) of plural rolls supporting the belt 21 in the adjusting directions J, K, there is provided a tension correction mechanism 60 which corrects a change in the tension of the endless belt 21 that is caused by the operation of the belt running adjusting mechanism 20 for displacing the roll 22, by displacing, in the correction directions L, M, a contact member (tension roll 25) which is in contact with the belt 21 along the direction of width thereof.
摘要:
A wiper device having a simple structure by which nearly the entire rectangular windshield surface of a vehicle can be wiped. In the wiper device, an arm comprises a drive link adapted to reciprocatively swing according to a drive operation of a wiper drive unit, a connecting link swingably and pivotally supported at an extreme end portion of the drive link, an operating link having a base end portion integrally fixed to the connecting link, a guide link that has a base end portion, which is swingably and pivotally supported on the vehicle body, and an extreme end portion, which is swingably and pivotally supported on the other end portion of the connecting link, and that is operative to guide the operating link in such a manner that the extreme end portion of the operating link reciprocatively moves in an approximately straight line with a reciprocative movement of the drive link, a supporting link swingably and pivotally supported at the extreme end portion of the operating link, and a holding link that has an extreme end portion, which is swingably and pivotally supported on the supporting link, and a base end portion, which is swingably and pivotally supported on the guide link, and that is operative to hold the supporting link in such a manner that the angle (.theta.) between the supporting link and the movement locus (A) of the extreme end portion of the operating link is maintained at a nearly constant value.
摘要:
A structure for mounting a wind receiving member on a wiper device is provided. An extending section extends from the extreme end side of a wiper arm beyond where a connector member is rotatably supported. Mounting holes are defined in the extending section and in the wiper arm in its base end side opposite the connector member. Mounting pieces of a wind receiving member are fixed by rivets through the mounting holes. The wind receiving member is mounted at the extreme end of the wiper arm by the use of the extending section. With this arrangement, the wind receiving member prevents the floating-up of a wiper blade when a vehicle travels at a high speed.
摘要:
An information recording and reproducing method and apparatus with increased recording density of an information recording medium using the sample servo method driven with a fixed angular velocity from the innermost circumference to the outmost circumference. A disk-shaped recording medium is concentrically divided into a plurality of areas. Recording is performed with a recording density suited for the radial position of each of the areas. The width of the areas is set so that the recording capacity of a user data section sandwiched between servo sections forming a segment may increase with every transition to an outer adjacent area while taking one byte as a unit. The recording and reproducing apparatus has a clock generating circuit for servo data extraction and a clock generating circuit for user data extraction. The latter clock generating circuit is synchronized by a synchronizing pulse generated by the former clock generating circuit.
摘要:
A pipe connecting structure for a pipe-type modular wiper apparatus includes: a first bracket to which a wiper motor is fastened; and a second bracket to which a wiper shaft is fastened and which is, via a pipe member, integrally connected to the first bracket to which a wiper motor is fastened. The pipe member is integrally fastened to the brackets by integrally inserting a pipe nut into an insertion hole formed at a position at which the pipe member is connected to the bracket in such a manner that a bolt is, in a threaded manner, inserted from the bracket side in a state where the bracket is brought into contact with a head portion of the pipe nut projecting over the pipe member. A recess-groove shape fastening groove portion is formed in a portion of the first bracket to be tightened by the bolt, and the pipe fitting groove portion has a depth with which the pipe member can be fitted by a degree larger than the half of the pipe member. Two introduction surfaces of the pipe fitting groove portion through which the pipe member is introduced are made to be parallel surfaces facing a direction of a tangent of the outer circumference of the pipe member.
摘要:
A PCM tape recording and reproducing apparatus for recording and reproducing an audio signal by using multitrack heads, comprises a frame interleaving device with a high dropout immunity function. The frame interleaving device comprises a distributor for successively distributing continuous interleaved input data between tracks, wihtin a multiplicity of tracks formed by splitting a magnetic tape, at a spacing of at least one track so that said continuous interleaved input data will not be shared between two continuous tracks in the same recording and reproducing direction, a data framing circuit for forming a frame out of data to be distributed to each of said tracks and for applying said frame with a synchronization signal at the top of said frame and with an error detection code at the end of said frame, and a delay circuit for delaying data associated with a track by one frame or more with respect to data associated with a neighboring track in the same recording and reproducing as said track.
摘要:
Errors in input data are concealed by interpolation using a mean value and the previous word which are automatically interchanged in accordance with the conditions of occurrence of errors. A series of data words in the input data is first modified into a form in which when the input word is erroneous it is replaced by correct input word immediately preceding the erroneous word. Then, in association with each word in the modified data word series a mean value between words immediately before and after that word or between that word and a word thereafter is produced, and if that word is the replaced word it is further replaced by the mean value produced in association with that data. Thus, an independent error is concealed by a mean value between the correct word immediately before and after the erroneous word while continuous errors are concealed in such a manner that the last erroneous word is replaced by the mean value between correct words occurring immediately before and after the continuous erroneous words and the other erroneous words are all replaced by the correct word occurring immediately before the continuous erroneous words.
摘要:
Digital data units representative of analog audio signal are constructed into a data unit sequence with an error detection code being added to each of the data units for detecting coding errors within the data unit, and data synchronizing signals are inserted one for every predetermined interval of the data unit sequence to constitute a PCM data sequence, which is recorded and reproduced. The number of times of coding errors detected within the data unit by the error detection code during the time period between one data synchronizing signal and the next following data synchronizing signal is monitored and when the number exceeds a first predetermined count, the audio output is muted, and when the number decreases below a second predetermined count which is much smaller than the first predetermined count, the muting mode of the audio output is released to prevent the noise output.
摘要:
A vertical JFET 1a according to the present invention has an n+ type drain semiconductor portion 2, an n-type drift semiconductor portion 3, a p+ type gate semiconductor portion 4, an n-type channel semiconductor portion 5, an n+ type source semiconductor portion 7, and a p+ type gate semiconductor portion 8. The n-type drift semiconductor portion 3 is placed on a principal surface of the n+ type drain semiconductor portion 2 and has first to fourth regions 3a to 3d extending in a direction intersecting with the principal surface. The p+ type gate semiconductor portion 4 is placed on the first to third regions 3a to 3c of the n-type drift semiconductor portion 3. The n-type channel semiconductor portion 5 is placed along the p+ type gate semiconductor portion 4 and is electrically connected to the fourth region 3d of the n-type drift semiconductor portion 3.