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公开(公告)号:US3466540A
公开(公告)日:1969-09-09
申请号:US3466540D
申请日:1963-05-01
Applicant: BELL TELEPHONE LABOR INC
Inventor: ROBERTSON GEORGE H
CPC classification number: G01R23/00
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公开(公告)号:US2862128A
公开(公告)日:1958-11-25
申请号:US40125953
申请日:1953-12-30
Applicant: BELL TELEPHONE LABOR INC
Inventor: ROBERTSON GEORGE H
IPC: H01J25/48
CPC classification number: H01J25/48
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公开(公告)号:US2821652A
公开(公告)日:1958-01-28
申请号:US31325252
申请日:1952-10-06
Applicant: BELL TELEPHONE LABOR INC
Inventor: ROBERTSON GEORGE H , WALSH EDWARD J
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公开(公告)号:US2765421A
公开(公告)日:1956-10-02
申请号:US27059952
申请日:1952-02-08
Applicant: BELL TELEPHONE LABOR INC
Inventor: ROBERTSON GEORGE H , WALSH EDWARD J
IPC: H01J23/50
CPC classification number: H01J23/50
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公开(公告)号:US3581078A
公开(公告)日:1971-05-25
申请号:US3581078D
申请日:1967-11-24
Applicant: BELL TELEPHONE LABOR INC
Inventor: ROBERTSON GEORGE H
CPC classification number: G06G7/1921
Abstract: The recursive equations of the Cooley-Tukey algorithm are implemented in analog form, thereby significantly decreasing the time needed to compute either the Fourier transform or the inverse Fourier transform of a signal segment, relative to the time needed for the same computation by a digital implementation of these equations.
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公开(公告)号:US2905852A
公开(公告)日:1959-09-22
申请号:US43680254
申请日:1954-06-15
Applicant: BELL TELEPHONE LABOR INC
Inventor: ROBERTSON GEORGE H
IPC: H01J21/02
CPC classification number: H01J21/02
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公开(公告)号:US2903580A
公开(公告)日:1959-09-08
申请号:US52834355
申请日:1955-08-15
Applicant: BELL TELEPHONE LABOR INC
Inventor: ROBERTSON GEORGE H
CPC classification number: H03F3/36 , H01J19/00 , H01J2893/001 , H03F1/36
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公开(公告)号:US2813990A
公开(公告)日:1957-11-19
申请号:US40123153
申请日:1953-12-30
Applicant: BELL TELEPHONE LABOR INC
Inventor: ROBERTSON GEORGE H
IPC: H01J3/02
CPC classification number: H01J3/027
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公开(公告)号:US2812499A
公开(公告)日:1957-11-05
申请号:US29823052
申请日:1952-07-11
Applicant: BELL TELEPHONE LABOR INC
Inventor: ROBERTSON GEORGE H
IPC: H01J23/26
CPC classification number: H01J23/26 , Y10T29/49016
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公开(公告)号:US2801358A
公开(公告)日:1957-07-30
申请号:US26373451
申请日:1951-12-28
Applicant: BELL TELEPHONE LABOR INC
Inventor: ROBERTSON GEORGE H
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