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公开(公告)号:DE3176906D1
公开(公告)日:1988-11-17
申请号:DE3176906
申请日:1981-08-31
Applicant: MOTOROLA INC
Inventor: DAVIS WALTER LEE , RAGHUNATHAN KUPPUSWAMY
IPC: G06F9/22 , G08B3/10 , H04B1/16 , H04B5/04 , H04L7/033 , H04L7/04 , H04Q1/39 , H04W8/24 , H04W88/02
Abstract: An battery powered, adaptive signal decoder is disclosed which is capable of processing detected encoded signals in accordance with a plurality of decoding schemes. The decoder has an equivalent microcomputer implementation. Energy conservation means operating independently of the detected signals acts to conserve the energy of the battery.
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公开(公告)号:AU576044B2
公开(公告)日:1988-08-11
申请号:AU5207786
申请日:1985-12-05
Applicant: MOTOROLA INC
Inventor: DAVIS WALTER LEE , DELUCA MICHAEL JOSEPH , SIEGEL WILLIAM GEORGE
Abstract: A DC to DC converter includes a power input for receiving power at a predetermined input voltage. The converter is current-controlled to provide output power at a predetermined output voltage and several output current levels. The converter is further selectively controlled for either continuous or intermittent mode of operation. The continuous mode provides the higher output current levels and the intermittent mode provides the lowest output current level.
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公开(公告)号:NO882687L
公开(公告)日:1988-06-17
申请号:NO882687
申请日:1988-06-17
Applicant: MOTOROLA INC
Inventor: DAVIS WALTER LEE
Abstract: PCT No. PCT/US86/02199 Sec. 371 Date Nov. 4, 1986 Sec. 102(e) Date Nov. 4, 1986 PCT Filed Oct. 21, 1986 PCT Pub. No. WO88/03349 PCT Pub. Date May 5, 1988.A radio communication receiver decodes digital signals transmitted over a radio link and is capable of altering the bit rate of the receiver to match the bit rate transmitted form a remote location. The receiver includes a receiver portion 21 receiving radio signals and producing a received signal. A microporocessor 26 is used for decoding the received signal. The microprocessor (26) is responsive to a bit rate signal that is generated by a programmable divider (33). The microprocessor (26) is adpated to detect a predetermined code signal to alter the timing characteristic of the bit rate signal for generating a bit rate signal at a second rate for decoding received signals at a second bit rate designated by the predetermined code signal.
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公开(公告)号:DE3176487D1
公开(公告)日:1987-11-19
申请号:DE3176487
申请日:1981-08-21
Applicant: MOTOROLA INC
Inventor: DAVIS WALTER LEE , JACOBSON JAMES EVERETTE
Abstract: A dual deadman timer circuit functions to reset a dual mode microprocessor in the event of loss of program control. The microprocessor has high and low power requirements corresponding to its two operating modes, and the deadman timer circuit also adjusts the output power level of an associated two-level power supply to ensure that sufficient power is available for the full operation of the microprocessor during reset. The deadman timer functions during both microprocessor modes and includes two level-sensitive input sections to ensure that the microprocessor is reset under an error condition.
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公开(公告)号:DK302385D0
公开(公告)日:1985-07-03
申请号:DK302385
申请日:1985-07-03
Applicant: MOTOROLA INC
Inventor: DAVIS WALTER LEE , HEROLD BARRY WAYNE , LITTLE WENDELL LEE
IPC: G06F1/00 , G06F1/04 , G06F1/08 , G06F1/32 , G06F15/78 , H03L7/089 , H03L7/107 , H03L7/183 , G06F
Abstract: A microcomputer (104) having predetermined clock pulse frequency requirements receives pulses from a multiplying type frequency synthesizer (200) which utilizes a reference frequency less than the largest of the predetermined requirements. The synthesizer (200) is responsive to program instructions to generate clock pulse frequencies sufficient to satisfy the requirement for immediate execution of programmed tasks. As the execution requirements change, the synthesizer (200) responds to provide only the frequency required. Thus, the power dissipated by the entire microcomputer system is minimized.
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公开(公告)号:BR8108824A
公开(公告)日:1982-08-24
申请号:BR8108824
申请日:1981-08-31
Applicant: MOTOROLA INC
Inventor: DAVIS WALTER LEE , KRAUL DOUGLAS ROBERT
Abstract: A memory system is used to store data and is powered-up by and only during accessing signals, thus using essentially no current when not being accessed. The memory system includes a decoding network using a mixture of NPN and PNP transistors, and a buffer circuit at the input to a memory cell array allows the use of a minimum number of select lines, having low power requirements.
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公开(公告)号:ES2191026T3
公开(公告)日:2003-09-01
申请号:ES94901673
申请日:1993-11-23
Applicant: MOTOROLA INC
Inventor: DAVIS WALTER LEE
Abstract: A cooperative paging system (10) and radio telephone system (15) combine to provide conventional delivery of short paging messages to a combination pager/radio telephone (40) via a first communication path, while a radio telephone link operating at a higher data rate is used to deliver large data messages to the pager/radio telephone (40). The radio telephone link is formed by a transceiver section (205) of the pager/radio telephone (40) coupling to a radio telephone base station (50,52) and calling up a paging terminal (32) of the paging system (10). The paging terminal (32) retrieves the large data messages from a temporary message memory (42) to deliver to the pager/radio telephone (40).
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公开(公告)号:AT222394T
公开(公告)日:2002-08-15
申请号:AT96923669
申请日:1996-06-28
Applicant: MOTOROLA INC
Inventor: DAVIS WALTER LEE , HUANG JIAN-CHENG , JASINSKI LEON
Abstract: An apparatus and method for processing a voice message to provide low bit rate speech transmission processes the voice message to generate speech parameters which are arranged into a two dimensional parameter matrix (502) including a sequence of parameter frames. The two dimensional parameter matrix (502) is transformed using a predetermined two dimensional matrix transformation function (414) to obtain a two dimensional transform matrix (506). Distance values representing distances between templates of a set of predetermined templates and the two dimensional transform matrix (506) are then derived. The distance values derived are identified by indexes identifying the templates of the set of predetermined templates. The distance values derived are compared, and an index corresponding to a template of the set of predetermined templates having a shortest distance is selected and then transmitted.
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公开(公告)号:CA2793746A1
公开(公告)日:2002-04-11
申请号:CA2793746
申请日:2001-10-05
Applicant: CERTICOM CORP , MOTOROLA INC
Inventor: VANSTONE SCOTT ALEXANDER , DAVIS WALTER LEE , AYERST DOUGLAS I
IPC: H04L9/32
Abstract: A wireless communication system includes a pager or similar device that communicates to a home terminal. The home terminal confirms the identity of the pager and attaches a certificate to the message for ongoing transmission. Where the recipient is also a pager, an associated home terminal verifies the transmission and forwards it in a trusted manner without the certificate to the recipient.
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公开(公告)号:CA2424897A1
公开(公告)日:2002-04-11
申请号:CA2424897
申请日:2001-10-05
Applicant: CERTICOM CORP , MOTOROLA INC
Inventor: VANSTONE SCOTT A , AYERST DOUGLAS I , DAVIS WALTER LEE
IPC: H04L9/32
Abstract: A wireless communication system includes a pager or similar device that communicates to a home terminal. The home terminal confirms the identity of the pager and attaches a certificate to the message for ongoing transmission . Where the recipient is also a pager, an associated home terminal verifies th e transmission and forwards it in a trusted manner without the certificate to the recipient.
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