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1.发明授权High gain wide band acoustic surface wave transducers using parametric upconversion 失效使用参数UPCONVERSION的高增益带宽声波表面波导
公开(公告)号：US3684892A
公开(公告)日：1972-08-15
申请号：US3684892D
申请日：1970-10-15
Applicant: IBM
Inventor： LEAN ERIC GUNG HWA , POLE ROBERT VALDIMIR , TSENG SAMUEL CHIN-CHONG
Abstract: Parametric upconverter acoustic surface wave transducer exhibiting high efficiency with wide band operation. The transducer consists of a combination of two constituent transducers, one a narrow bandwidth, high efficiency transducer and the other a wide bandwidth, low efficiency transducer, coupled to produce a resultant acoustic wave of a frequency equal to the sum of the frequencies of acoustic waves supplied by the low and high efficiency transducers. By properly selecting the center frequency of the low efficiency transducer relative to center frequency of the high efficiency transducer as well as the input electric power, the efficiency of the transducer of this invention may be made greater than the efficiency of the low efficiency transducer while retaining its wide bandwidth.
Abstract translation: 参数上变频器声表面波换能器在宽带操作中表现出高效率。 传感器由两个构成传感器组成，一个是窄带宽，高效率的换能器，另一个是宽带宽，低效率的换能器，耦合到产生频率等于声波频率之和的合成声波 由低和高效传感器提供。 通过适当地选择低效率换能器相对于高效换能器的中心频率的中心频率以及输入功率，本发明的换能器的效率可以大于低效换能器的效率，同时保持 其宽带宽。
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公开(公告)号：US3680007A
公开(公告)日：1972-07-25
申请号：US3680007D
申请日：1970-09-30
Applicant: IBM
Inventor： TSENG SAMUEL CHIN-CHONG
CPC classification number: H03H9/14544 , H03H9/14547 , H03H9/1455
Abstract: Surface wave transducers of the interdigital type for generating and detecting return to zero pulse sequences of surface waves are disclosed. The transducer, which is located on the surface of a suitable surface wave medium, is an interdigitated electrode array including main electrodes that are perpendicular to the transducer leads and auxiliary electrodes that are inclined at an angle to the main electrodes.
Abstract translation: 公开了用于产生和检测返回到表面波的零脉冲序列的叉指式的表面波换能器。 位于合适的表面波介质的表面上的换能器是包括主要电极的叉指电极阵列，该主电极垂直于与主电极成一定角度倾斜的换能器引线和辅助电极。
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公开(公告)号：AU536299B2
公开(公告)日：1984-05-03
申请号：AU6497580
申请日：1980-12-02
Applicant: IBM
Inventor： GOERTZEL GERALD , POWELL CARL GEORGE , TSENG SAMUEL CHIN-CHONG
Abstract: A character compaction and generation method and apparatus which is particularly adapted to the generation of complex characters such as Kanji characters. A dot matrix (Fig. 2-1) defining a given character is compacted into a sparse matrix (Fig. 2-7), with the original character being reconstructed for printing or display from the compacted character defined in the sparse matrix. Each character in the complex character set is compacted and stored in memory (50) one time only, with decompaction being performed each time a given character is to be generated. A set of symbols are defined to represent different patterns which occur frequently in the entire complex character set. Different combinations of the symbols define a given character. The information stored for each sparse matrix representing a given character is comprised of eacn symbol in the sparse matrix, its position, and its size parameter if the symbol represents a family of patterns which differ only in size. Three groups (A, B, C,) of different patterns are defined which occur frequently in the complex character set, namely, a first group (A) which has a fixed size for each pattern, a second group (B) which has one size parameter which must be specified for each pattern, and a third group (Cl which has a plurality of size parameters which must be specified for each pattern. Certain ones of the characters have elements of different patterns which overlap, such that the character may be encoded utilizing less symbols, and according less bytes of data. A given pattern may be generated atthe same time another pattern is being decoded.
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公开(公告)号：DE2853495A1
公开(公告)日：1979-06-28
申请号：DE2853495
申请日：1978-12-12
Applicant: IBM
Inventor： TSENG SAMUEL CHIN-CHONG
IPC: B41J2/485 , B41B19/01 , B41B27/28 , G06K15/10 , G06K15/12 , G09G5/24 , G09G5/28 , H03M7/42 , G06K15/20
Abstract: A character compaction and generation method and apparatus which is particularly adapted to the generation of complex characters such as Kanji characters. A dot matrix defining a given character is compacted into a sparse matrix, with the original character being reconstructed for printing or display from the compacted character defined in the sparse matrix. Each character in the complex character set is compacted and stored in memory one time only, with decompaction being performed each time a given character is to be generated. A set of symbols are defined to represent different patterns which occur frequently in the entire complex character set. Different combinations of the symbols define a given character. The information stored for each sparse matrix representing a given character is comprised of each symbol in the sparse matrix, its position, and its size parameter if the symbol represents a family of patterns which differ only in size.
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Patent Agency Ranking
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公开(公告)号：AU558569B2
公开(公告)日：1987-02-05
申请号：AU1385183
申请日：1983-04-21
Applicant: IBM
Inventor： FLEEK ARTHUR EDWIN , TSENG SAMUEL CHIN-CHONG
Abstract: A variable speed printing (VSP) adaptor for a dot matrix printer includes a monitoring counter (40) which is preset with a number equal to the number of column scans with a dot print line and has a plurality of devices each capable of assuming one of two states, to monitor the state of the pattern data to be printed. The pattern data to be printed is scanned in a forward direction, i.e in the normal printing direction starting at the first print position and the count in the counter is decremented one count for each column data scanned. During the time interval between when this data is latched and the actual hammer actuation, the pattern data is scanned in the backward direction starting at the last print position. Each time the column data for a backward scan is zero, i.e. no dot to be printed, prior to sensing a non-zero column, the count in the counter is decremented one count. The printing operation continues in the interleaved forward/ backward scans until the count in the counter reaches a reference level such as zero. Upon sensing this reference level in the counter, a control signal is generated which indicates that the printing of the dot row is complete and initiates movement of the paper to the next dot row position.
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