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公开(公告)号：US3599119A
公开(公告)日：1971-08-10
申请号：US3599119D
申请日：1969-05-29
Applicant: IBM
Inventor： CROUSE WILLIAM G , EPLEY PHILLIP R
Abstract: An automatic gain control circuit for a resonistor, i.e., a mechanical oscillator, formed from a single silicon crystal, can be diffused directly into the crystal. The circuit requires no phase reactive components and the entire oscillatory unit can be fabricated by monolithic circuit techniques.
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公开(公告)号：CA886190A
公开(公告)日：1971-11-16
申请号：CA886190D
Applicant: IBM
Inventor： EPLEY PHILLIP R , CROUSE WILLIAM G
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公开(公告)号：BR9203871A
公开(公告)日：1993-05-04
申请号：BR9203871
申请日：1992-10-05
Applicant: IBM
Inventor： CHRISTOPHER ROBERT J , DACOSTA DONALD J , DIEPENBROCK JOSEPH C , EPLEY PHILLIP R
IPC: H04L25/02 , G06F13/40 , H03K19/0175 , H04L25/08
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Patent Agency Ranking
公开(公告)号：CA1147868A
公开(公告)日：1983-06-07
申请号：CA352829
申请日：1980-05-27
Applicant: IBM
Inventor： DAHL JEROME P , EPLEY PHILLIP R , FOX JON E
Abstract: PROGRAM CONTROLLED CAPACITIVE KEYBOARD SENSING SYSTEM An improved sensing apparatus for detecting impedance changes in a variable impedance matrix keyboard is described. A microprocessor is utilized to control the basic key intersections scanning and for accurately calibrating and adjusting the sensing threshold of the sense amplifier prior to testing each key intersection so that the effects of stray impedance and varying voltage levels may be compensated for.
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公开(公告)号：CA2178846C
公开(公告)日：1998-11-17
申请号：CA2178846
申请日：1992-07-03
Applicant: IBM
Inventor： EPLEY PHILLIP R , DACOSTA DONALD J , DIEPENBROCK JOSEPH C , CHRISTOPHER ROBERT J
IPC: H04B1/40
Abstract: A high-speed data transport system for use in computers, switches, microprocessors or the like includes a low impedance differential bus and a plurality of transceivers connected to the bus. Each of the transceivers is provided with a driver circuit which places data onto the bus and a receiver for accepting data from the bus. The driver includes a pseudo-differential current driving circuit arrangement which sinks current from only one side of the bus while the other side of the differential bus is undisturbed. The receiver includes a differential comparator biased to a preferred output voltage level.
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公开(公告)号：CA2073105A1
公开(公告)日：1993-04-29
申请号：CA2073105
申请日：1992-07-03
Applicant: IBM
Inventor： CHRISTOPHER ROBERT J , DACOSTA DONALD J , DIEPENBROCK JOSEPH C , EPLEY PHILLIP R
IPC: H04L25/02 , G06F13/40 , H03K19/0175 , H04L25/08
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公开(公告)号：CA2073105C
公开(公告)日：1997-01-21
申请号：CA2073105
申请日：1992-07-03
Applicant: IBM
Inventor： CHRISTOPHER ROBERT J , DACOSTA DONALD J , DIEPENBROCK JOSEPH C , EPLEY PHILLIP R
IPC: H04L25/02 , G06F13/40 , H03K19/0175 , H04L25/08 , H03K19/082
Abstract: A high-speed data transport system for use in computers, switches, microprocessors or the like includes a low impedance differential bus and a plurality of transceivers connected to the bus. Each of the transceivers is provided with a driver circuit which places data onto the bus and a receiver for accepting data from the bus. The driver includes a pseudo-differential current driving circuit arrangement which sinks current from only one side of the bus while the other side of the differential bus is undisturbed. The receiver includes a differential comparator biased to a preferred output voltage level.
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公开(公告)号：CA2178846A1
公开(公告)日：1993-04-29
申请号：CA2178846
申请日：1992-07-03
Applicant: IBM
Inventor： CHRISTOPHER ROBERT J , DACOSTA DONALD J , DIEPENBROCK JOSEPH C , EPLEY PHILLIP R
IPC: H04B1/40
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