Patents Represented by Attorney Keith Chanroo
  • Patent number: 5740534
    Abstract: A selective call receiver (106) has a frequency synthesizer (708) for scanning a plurality of frequencies to determine a control channel to receive a signal and a receiver (704) for receiving the signal representative of an available frequency associated with a geographic region. The signal includes a channel identifier (404), a frequency assignment (406) and an active channel indicator (408). A processor (712) associates the channel identifier (404) with the frequency assignment (406) in response to the active channel indicator (408) indicating an available frequency of the geographic region and a memory (720) stores channel identifiers (404) associated with frequency assignments (406) designating available frequencies (408).
    Type: Grant
    Filed: February 22, 1996
    Date of Patent: April 14, 1998
    Assignee: Motorola, Inc.
    Inventors: Douglas I. Ayerst, Malik J. Khan, Morris Moore, Leonard E. Nelson, Kwok K. Choi
  • Patent number: 5734974
    Abstract: A receiver (100) for receiving an input signal and generating an output signal therefrom has a switchable gain circuit (104) with a stepwise variable gain control (118), a local oscillator (106) and an automatic gain control (AGC) detector (114) with a response for detecting a level of the output signal and generating an AGC signal indicative of the level of the output signal and a state machine (116) being responsive to the AGC signal generating a control signal at the stepwise variable gain control to increase or decrease a gain of the switchable gain circuit in discrete stepwise steps.
    Type: Grant
    Filed: March 27, 1996
    Date of Patent: March 31, 1998
    Assignee: Motorola, Inc.
    Inventors: Edgar Herbert Callaway, Jr., James Gregory Mittel, Vance Howard Peterson, Burkhard Dick, Knud Holtvoeth, Wilfried Knop
  • Patent number: 5729575
    Abstract: A digital transmission system for a selective call message communication network such as a paging network utilizes a quadrature amplitude modulation (QAM) transmitter (40) and receiver (42). The QAM transmitter (40) receives as a modulating input thereto, a message data encoded signal with a pilot carrier in a notch of the power spectrum of the signal. In order to generate the signal, the system generates a Hilbert transform of a wave-form representing message data to be transmitted. The Hilbert transform and message data waveform are combined to provide a positive frequency component and a negative frequency component. These frequency components are shifted apart and combined to provide a notch in which a DC component can be added to form a pilot carrier. A receiver of the system removes the pilot carrier from a received signal and shifts the positive and negative frequency components together to recover the message data.
    Type: Grant
    Filed: June 20, 1995
    Date of Patent: March 17, 1998
    Assignee: Motorola, Inc.
    Inventor: Clifford Dana Leitch
  • Patent number: 5724389
    Abstract: A method and apparatus detects (516) a baud rate in a digital signal (442). An N-state counter (404) counts at a rate N times the baud rate and the digital signal is sampled (504) to detect transitions of the digital signal. N tallies (202) record how many transitions occur coincident with each of the states of the counter, and a total number of transitions detected is computed (508). M groups (204-210) of the tallies are formed (510) corresponding to contiguous sequential states of the counter, and for each group a group number is calculated (512) indicating how many transitions are recorded in the tallies of the group. Each group is defined (514) transitional if the group number exceeds a percentage (413) of the total number of transitions, and the baud rate is determined present or absent based upon the groups that are defined as transitional.
    Type: Grant
    Filed: December 8, 1995
    Date of Patent: March 3, 1998
    Assignee: Motorola, Inc.
    Inventors: Paul Marko, Motty Shor, Mark Rindsberg, Craig Wadin
  • Patent number: 5719996
    Abstract: A selective call communication system (100) has a speech recognition system using an acoustic space (400) which has a plurality of probability density functions (pdfs). The selective call communication system (100) has an acoustic space generator (136) for representing speech in the acoustic space (400) which has a plurality of regions (1-14) having a subset of the plurality of probability density functions (502-516). The selective call communication system (100) has a tree generator (138) for generating a hierarchical tree structure (500) representing the subset of the plurality of probability density functions (502-516) associated with the plurality of regions (1-14), a score computer (132) for determining a region of the plurality of regions (1-14) indicative of a minimum distance to a center of the region for a speech sample received, and a speech recognizer (130) for calculating the probability density functions of the region for recognizing the speech sample received.
    Type: Grant
    Filed: June 30, 1995
    Date of Patent: February 17, 1998
    Assignee: Motorola, Inc.
    Inventors: Lu Chang, Yan-Ming Cheng
  • Patent number: 5697068
    Abstract: A transceiver synthesizer includes components that enable it to be tuned non-invasively by software. The transceiver synthesizer includes a non-volatile memory (30) that can be non-invasively programmed with a digital value for each of a number of tuning variables. The digital values are converted by digital to analog converters (37, 38, 39) into tuning voltages. The tuning voltages are applied to voltage variable devices (60, 80, 95) that respond to changes in the applied tuning voltage to vary an operating characteristic thereof. The operating characteristics of the voltage variable devices (60, 80, 95) are non-invasively adjustable to tune the transceiver synthesizer for high and low port modulation deviation, reference oscillator make tolerance, automatic frequency control, reference oscillator temperature compensation etc.
    Type: Grant
    Filed: June 15, 1995
    Date of Patent: December 9, 1997
    Assignee: Motorola, Inc.
    Inventors: Raul Salvi, John Wetters, Wayne Phang
  • Patent number: 5694135
    Abstract: An antenna (100) has a connector (200) having a ground lead (102) and a signal lead (114). A dielectric (112) captures and embeds the connector (200) forming a connector substrate assembly (120) having a first side (122) and a second opposite side (124). A first conductive material (104) is affixed to the first side (122) of the connector substrate assembly (120) and coupling to the ground lead (102) and a second conductive material (110) is affixed to the second opposite side (124) of the connector substrate assembly (112) coupling the signal lead (114).
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: December 2, 1997
    Assignee: Motorola, Inc.
    Inventors: Raymond Dikun, Dennis Burrell, David M. Dickirson
  • Patent number: 5694120
    Abstract: A selective call transceiver (200) has a plurality of assignable address ports (246), a receiver (204) for receiving a directory of information services (120-132) on a mail drop address port, a controller (210) for generating a menu (240) from the directory of information services (120-132), a display (228) for displaying the menu (240) of the information services from the plurality of assignable address ports (246) and a user interface (216) for selecting an information service (242) from the menu (240) of information services. The controller (210) is further coupled to the user interface (216) to assign the information service being selected to the identified assignable address port, and a transmitter (208) transmits a request for the selected information service (242) including an address for identifying selectable address port.
    Type: Grant
    Filed: February 26, 1996
    Date of Patent: December 2, 1997
    Assignee: Motorola, Inc.
    Inventors: Jack P. Indekeu, Christopher G. Henz
  • Patent number: 5689806
    Abstract: A channel scanning communication receiver (204) operates in a system that transmits information in cycles (104) including subsequences (106). The receiver determines whether to operate in a scanning or locked mode by making (302) signal quality pass/fail decisions for subsequences transmitted in a predetermined group of cycles. A decision is made for a transmission of a subsequence, and subsequence active/inactive decisions are made (304) for the subsequences transmitted in the predetermined group of cycles, based upon the signal quality pass/fail decisions made for the subsequences. The receiver determines (306) whether the system is time-shared or continuous, based upon how many active decisions and inactive decisions are made, and selects (310, 312) the scanning or locked mode in accordance with predetermined rules for time-shared or continuous systems, according to whether the system is time-shared or continuous.
    Type: Grant
    Filed: December 26, 1995
    Date of Patent: November 18, 1997
    Assignee: Motorola, Inc.
    Inventors: Paul Marko, Motty Shor, Mark Rindsberg, Craig Wadin
  • Patent number: 5686901
    Abstract: A paging controller (10) assigns pages to particular batch positions utilizing a metric that minimizes the gaps between messages in a batch so as to increase the efficiency and throughput of the system. The controller (10) stores information representing messages that are received for transmission in a queue (31-38) having the same associated frame number as the frame number of the message. A metric value representing a distance between an end of a message, if it is placed in a batch starting at a position associated with the message's frame number, and a subsequent batch position is calculated for the received messages identified in the queues (31-38). Messages are assigned to positions in the batches based upon the shortest calculated distance value so as to substantially minimize the gaps between adjacent messages in the batches.
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: November 11, 1997
    Assignee: Motorola, Inc.
    Inventor: Xuming Chen
  • Patent number: 5684859
    Abstract: A selective call system (100) has a plurality of base sites (120-124) for communicating with a plurality of selective call receivers (108) with acknowledge-back capability. A base site transmitter (210) transmits signals encoded with a stored location identifier (132), a base site receiver (241) receives acknowledge-back signals in response to the transmitted signals and a controller (206) determines when a selective call receiver (108) is authorized to receive location specific information (134). The base site transmitter (210) downloads the location specific information (134) to the selective call receiver (108) in response to verifying that the selective call receiver (108) is authorized. The selective call receiver (108) the signals having the location identifier (132) and the downloaded location specific information (134).
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: November 4, 1997
    Assignee: Motorola, Inc.
    Inventors: Keith Anthony Chanroo, Walter Lee Davis
  • Patent number: 5684865
    Abstract: A selective call system (10) transmits efficiently encoded and compressed facsimile communication to at least one FAX selective call receiver (40). The selective call system (10) receives a subscriber identification number and a FAX message, decodes and expands the FAX message, and then Efficiently Encodes and Compresses (EEC) the FAX message data for inclusion in a selective call FAX message. The selective call system (10) then transmits the selective call FAX message destined for reception by at least one FAX selective call receiver (40). The at least one FAX selective call receiver (40) receives the selective call FAX message, and efficiently decodes and expands the EEC FAX message from the selective call FAX message to present the FAX message to a user of the FAX selective call receiver (40), such as via a display (90).
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: November 4, 1997
    Assignee: Motorola, Inc.
    Inventors: Mojdeh Mohtashemi, Ali Saidi
  • Patent number: 5678191
    Abstract: A transceiver (125) for receiving messages and transmitting acknowledgments includes a receiver (365) for receiving a message and time information indicative of a first time slot, a display (400) coupled to the receiver (365) for presenting the message, and a monitor element (430) coupled to the display (400) for determining, at occurrence of the first time slot, whether the message has been presented. A transmitter (380) coupled to the monitor element (430) and the receiver (365) transmits, in response to occurrence of the first time slot, a message acknowledgment when the message has not been presented. When the message has been previously presented, a read acknowledgment, rather than the message acknowledgment, is transmitted to indicate both message reception and message presentation.
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: October 14, 1997
    Assignee: Motorola, Inc.
    Inventors: Eric Thomas Eaton, Von Alan Mock
  • Patent number: 5666273
    Abstract: A selective call receiver (110) and a receptacle (150) has in combination (100) a breakaway lock (120, 154), a non-breakaway hinge (124, 126), a track (116) and a slidably coupling having the breakaway lock (120, 154) and the non-breakaway hinge (124, 126) coupled with the track (116) for removing and replacing the selective call receiver (110). The breakaway lock (120, 154) has a tab (154) and a groove (120) for disengaging the selective call receiver (110) from the receptacle (150) at the breakaway lock (120, 154). The non-breakaway hinge (124, 126) forms a rotatable coupling for pivoting the selective call receiver (110). The non-breakaway hinge (124, 126) has a rail (126) and a geometric groove (124) terminating the track (116).
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: September 9, 1997
    Assignee: Motorola, Inc.
    Inventor: Robert Kurcbart
  • Patent number: 5663717
    Abstract: A communications system (100) for transmission of a plurality of messages over a communications channel includes a terminal (105) for selectively transmitting each of the plurality of message, and data communication receivers (110) for receiving first and second messages about the same event. The first and second messages are compared in order to determine the status change of the event, and an alert priority is issued indicating that the event is at a critical stage, based on such comparison.
    Type: Grant
    Filed: May 6, 1996
    Date of Patent: September 2, 1997
    Assignee: Motorola, Inc.
    Inventor: Michael Joseph DeLuca
  • Patent number: 5652595
    Abstract: An antenna (10) is set forth which may be used in, among other devices, a communications device, particularly a portable communications device. The antenna (10) includes a dielectric substrate (25) having first and second opposed sides. A ground plane (20) is disposed at the second side of the dielectric substrate and is in electrical contact therewith. An electrically conductive patch element (30) is supported by the first side of the dielectric substrate (25). The patch element (30) includes a feed point (40) at which RF energy is supplied to or received from the patch element (30). A plated aperture (70) is disposed through and electrically connected to the patch element (30) and extends into the dielectric substrate (25). The plated aperture (70) is electrically insulated from the ground plane (20) and offset from the feed point (40). The addition of the plated aperture (70) to the antenna (10) increases the electrical length of the antenna through reactive loading.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: July 29, 1997
    Assignee: Motorola, Inc.
    Inventors: Arthur R. Ahrens, Chung Tong
  • Patent number: 5647123
    Abstract: A method and apparatus improves a distribution of an underfill material (504) applied between a flip chip die (202) and a circuit board (310) at a flip chip site (302) having a solder mask (308). An aperture (304) is formed (806) in the solder mask (308) by removing a predetermined majority of the solder mask (308) from the circuit board (310) within the flip chip site (302) before mounting the flip chip die (202). Then the flip chip die (202) is mounted (810) to the flip chip site (302). The underfill material (504) is then applied (812, 814, 816) such that the underfill material (504) flows into the aperture (304), thus improving the distribution of the underfill material (504).
    Type: Grant
    Filed: October 16, 1995
    Date of Patent: July 15, 1997
    Assignee: Motorola, Inc.
    Inventors: Jonathon G. Greenwood, James G. Lance, Jr., Robert Kenneth Doot
  • Patent number: D381364
    Type: Grant
    Filed: April 22, 1996
    Date of Patent: July 22, 1997
    Assignee: Motorola, Inc.
    Inventors: Neil Johan Schmertmann, David Townsend, Robert Kurcbart
  • Patent number: D389149
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: January 13, 1998
    Assignee: Motorola, Inc.
    Inventors: Charles Alan Actor, Anthony Morris Potts, Anthony Thomas Pannozzo
  • Patent number: D389481
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: January 20, 1998
    Assignee: Motorola, Inc.
    Inventors: Wai Kee Chan, Chong Heng Choy, Choon Ming Yap