公开(公告)号：AT141452T

公开(公告)日：1996-08-15

申请号：AT90917819

申请日：1990-05-18

Applicant: MOTOROLA INC

Inventor： HEROLD BARRY WAYNE ,  TAHERNIA OMID ,  DAVIS WALTER LEE ,  RIVAS MARIO ALBERTO

IPC: H03L7/18 ,  H03J5/02 ,  H03J1/00

Abstract: A frequency synthesizer which has at least one programmably characterized phase lock loop circuit includes a buffer memory and an interface controller responsive to operational codes received from a central controller to direct transfer of data words for characterization of the phase lock loop circuit among the at least one phase lock loop circuit, the buffer memory, and the central controller. In one embodiment, the transfer of data words between the central controller and phase lock loop circuit or buffer memory are performed serially in accordance with a prespecified protocol and governed by a clock signal generated by the central controller. Data word transfers between the buffer memory and at least one phase lock loop circuit may also be performed serially in accordance with a prespecified protocol, but may be governed autonomously by an internal clock signal generated by the frequency synthesizer.

公开(公告)号：HUT73106A

公开(公告)日：1996-06-28

申请号：HU9501551

申请日：1993-11-23

Applicant: MOTOROLA INC

Inventor： DAVIS WALTER LEE

IPC: H04B5/00 ,  H04W84/02 ,  H04B7/26

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).

公开(公告)号：PL309247A1

公开(公告)日：1995-10-02

申请号：PL30924793

申请日：1993-11-23

Applicant: MOTOROLA INC

Inventor： DAVIS WALTER LEE

IPC: H04B5/00 ,  H04W84/02 ,  H04B7/26

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).

公开(公告)号：HK101195A

公开(公告)日：1995-06-30

申请号：HK101195

申请日：1995-06-22

Applicant: MOTOROLA INC

Inventor： DAVIS WALTER LEE ,  SIRANG NASRIN

IPC: B41J2/45 ,  G06F9/445 ,  G08B3/10 ,  H04B7/26 ,  H04W8/24 ,  H04W88/02 ,  H04Q7/02

Abstract: PCT No. PCT/US87/00004 Sec. 371 Date Jun. 11, 1987 Sec. 102(e) Date Jun. 11, 1987 PCT Filed Jan. 2, 1987.A communication receiver is disclosed which can decode signals transmitted by radio frequency propagation. A programmable controller uses instructions in a non-volatile reprogrammable memory to decode and process the signals, and to output the information contained in the signals in a useable form. The controller also responds to predetermined signals by decoding and processing information for new decoding and operating instructions, and stores the data in a temporary memory. Logic circuitry responds to subsequent predetermined signals to enable selective reprogramming of the non-volatile reprogrammable memory by data stored in the temporary memory to alter the decoding characteristics of the receiver.

公开(公告)号：HK81995A

公开(公告)日：1995-06-01

申请号：HK81995

申请日：1995-05-25

Applicant: MOTOROLA INC

Inventor： DAVIS WALTER LEE ,  RAGHUNATHAN KUPUSWAMY

IPC: G06F9/22 ,  G08B3/10 ,  H04B1/16 ,  H04B5/04 ,  H04L7/033 ,  H04L7/04 ,  H04Q1/39 ,  H04W8/24 ,  H04W88/02 ,  H04Q7/02

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.

公开(公告)号：PL307563A1

公开(公告)日：1995-05-29

申请号：PL30756394

申请日：1994-05-31

Applicant: MOTOROLA INC

Inventor： DAVIS WALTER LEE

IPC: H04B1/10 ,  H04B15/04 ,  H04Q7/14

Abstract: A radio receiver (40) for receiving an RF signal comprises receiving circuitry (42) for receiving and demodulating the RF signal and a microcomputer (44) coupled to the receiving circuitry (42) for enabling and disabling the receiving circuitry (42) at predetermined times. The radio receiver (40) further comprises an expansion chip (68) coupled to and controlled by the microcomputer (44) for communicating therewith to further process the RF signal. Communication between the microcomputer (44) and the expansion chip (68) occurs at a first speed when the receiving circuitry (42) is enabled and at a second speed faster than the first speed when the receiving circuitry (42) is disabled.

公开(公告)号：FI952577A0

公开(公告)日：1995-05-26

申请号：FI952577

申请日：1995-05-26

Applicant: MOTOROLA INC

Inventor： DAVIS WALTER LEE

IPC: H04B5/00 ,  H04W84/02 ,  H04Q

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).

公开(公告)号：FI952577A

公开(公告)日：1995-05-26

申请号：FI952577

申请日：1995-05-26

Applicant: MOTOROLA INC

Inventor： DAVIS WALTER LEE

IPC: H04B5/00 ,  H04W84/02 ,  H04Q

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).

公开(公告)号：NO950765L

公开(公告)日：1995-02-28

申请号：NO950765

申请日：1995-02-28

Applicant: MOTOROLA INC

Inventor： DAVIS WALTER LEE

IPC: H04B1/10

公开(公告)号：HK13995A

公开(公告)日：1995-02-10

申请号：HK13995

申请日：1995-02-06

Applicant: MOTOROLA INC

Inventor： DAVIS WALTER LEE ,  PRIETO YOLANDA

IPC: H03D3/06 ,  H03D3/02 ,  H03D3/20

Abstract: An inductorless quadrature demodulator for frequency modulated signals is disclosed. A limited FM signal is passed through an active filter (26) and a phase shift network (30) to produce a quadrature signal. The limited FM signal is compared with the quadrature signal in an EXCLUSIVE OR gate (24) and then low pass filtered (36) to obtain recovered audio. The active filter (26) includes a transconductance amplifier (60) whose center frequency can be adjusted by appropriate adjustment of the amplifier's bias current. The bias current is temperature compensated to allow operation of the demodulator over a wide temperature range.