Patents Represented by Attorney, Agent or Law Firm Pedro P. Hernandez
  • Patent number: 5381114
    Abstract: A continuous time common mode feedback amplifier CTCMFB (300) is suitable for applications requiring fully differential amplifiers in low voltage supply requirements. Two mirror image, low gain CMOS amplifiers (MP0/MP2 and MP3/MP4) in the CTCMFB (300) define and stabilize the common mode output voltage, Vcm, of the main differential amplifier (102). The transient response of the common mode amplifier (300) can be adjusted independently of the transient response of the main differential amplifier (102), allowing fast transient response to the main differential amplifier.
    Type: Grant
    Filed: April 4, 1994
    Date of Patent: January 10, 1995
    Assignee: Motorola, Inc.
    Inventors: Jesus S. Pena-Finol, Mark J. Chambers, James B. Phillips
  • Patent number: 5378996
    Abstract: An RF power amplifier is provided having means for defining rise and fall envelopes of the RF power, i.e. the key and de-key characteristics. A power amplifier (10), detector (13) and regulator (15 ) form a power control feedback loop. A further regulator (21) is provided having a first input coupled to the output of the power control loop regulator and an output coupled to the input of the power control loop regulator, thereby providing negative feedback to the power control loop regulator. Means are provided, coupled to a second input of the further regulator for providing a rising and falling control signal (Vramp) for control of the power amplifier.
    Type: Grant
    Filed: November 18, 1993
    Date of Patent: January 3, 1995
    Assignee: Motorola, Inc.
    Inventors: Klaus Pai, Ralf Gregory
  • Patent number: 5379008
    Abstract: An electronic circuit (300) includes first (302) and second (304) variable impedance devices coupled together. The first (302) and second (304) variable impedance devices are designed such that each exhibits a transfer function which is substantially inverse with respect to the other about the operating point of the electronic circuit. This provides for an electronic circuit which exhibits very low distortion characteristics. Circuits such as tunable filters, voltage-controlled oscillators (VCOs), receivers, etc. will benefit from using an electronic circuit (300) which exhibits such low distortion characteristics.
    Type: Grant
    Filed: March 3, 1993
    Date of Patent: January 3, 1995
    Assignee: Motorola, Inc.
    Inventors: David E. Bockelman, Robert E. Stengel, Kenneth D. Cornett
  • Patent number: 5373125
    Abstract: A tilt switch assembly (100) includes a hall-effect device (102) for determining if a magnet (110) which is placed within a housing (112) has tilted a predetermined amount causing the hall-effect device to actuate. In another embodiment of the invention (300), a movable magnetic filed concentrator (306) which moves in response to switch assembly (300) being tilted causes a tilt condition signal to be generated when the switch assembly (300) is tilted a predetermined amount. In still another embodiment of the present invention, a magnet (502) is stored within a cavity area which allows for the magnet to tilt when the switch assembly (500) is tilted a predetermined amount. Once the magnet (502) becomes tilted, a tilt condition signal is generated.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: December 13, 1994
    Assignee: Motorola, Inc.
    Inventors: Robert B. Ford, James V. Pottala
  • Patent number: 5373246
    Abstract: A digital fast frequency shift keying (FFSK) demodulator for demodulating an FFSK signal having components at first and second frequencies f0 and f1. The FFSK signal is sampled and the samples are processed in an arrangement which includes a monostable function (50) and a digital notch filter (51) for distinguishing between the components to provide a demodulated output. The digital notch filter (51) is arranged to filter out frequencies which are multiples of the frequencies f0 and f1.
    Type: Grant
    Filed: October 22, 1993
    Date of Patent: December 13, 1994
    Assignee: Motorola, Inc.
    Inventors: Hans C. Blomberg, Soren Hojsteen
  • Patent number: 5373276
    Abstract: A self centering coil (200) includes a coil section (202) and also having curved end section (206) and (204) at opposite sides of the coil section (202). The curved end sections are preferably substantially flat and in a plane which is parallel to the center axis (306) of the coiled section (202).
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: December 13, 1994
    Assignee: Motorola, Inc.
    Inventors: Anthony J. Suppelsa, Fadia Nounou, Anthony B. Suppelsa
  • Patent number: 5371901
    Abstract: A portable communication device (10) is controlled by voice recognition circuitry (20) remote from the portable communication device. The portable communication device includes apparatus for producing and transmitting a parametric representation of voice commands. The remote circuitry (which could possibly be a base station, a mobile repeater, or simply a dedicated box, separate from the portable) produces control signals, responsive to the parametric representation of voice commands, for controlling the portable communication device.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: December 6, 1994
    Assignee: Motorola, Inc.
    Inventors: John D. Reed, R. Mark Harrison, Walter J. Rozanski, Jr.
  • Patent number: 5371453
    Abstract: A battery unit charger system is provided which includes a charger (110) for supplying charge current and a battery (120) having a memory (122) for storing battery-related information. The charger (110) includes a controller which exchanges the battery-related information with the memory (122) and in response thereto, controls overall operation of the charger (120). The battery (120) includes a common battery port (126) for selectively receiving charge current and for exchanging data with the charger (120). The controller cuts off the supply of charge current when data is being exchanged with the memory through the common port (126).
    Type: Grant
    Filed: January 28, 1993
    Date of Patent: December 6, 1994
    Assignee: Motorola, Inc.
    Inventor: Jose M. Fernandez
  • Patent number: 5365027
    Abstract: Switch assembly (100) includes a housing (112) having a pair of spring finger contacts (114and 116) and a circuit board (144). A spring loaded actuator (134) is slideably located within housing (112) between first and second switching positions. Actuator (134) includes a pair of conductive wipers (136 and 138) which move relative to metalized traces (146, 148 and 150) located on the top surface of circuit board (144). Switch assembly (100) provides for a compact surface mountable switch which is capable of switching RF signals between a radio antenna (618) and an external accessory connector while minimizing electrical signal path lengths and moving parts in the switch assembly.
    Type: Grant
    Filed: November 3, 1992
    Date of Patent: November 15, 1994
    Assignee: Motorola, Inc.
    Inventors: Lawrence E. Marvet, Scott T. Ma, Son Q. Le, Douglas D. Peebles, David Karl, William C. Phelps, III
  • Patent number: 5363067
    Abstract: A microstrip assembly (100), includes a first substrate such as a multilayer substrate (102, 106 and 112) having pockets or cavity areas (104). A second substrate (110) includes transmission lines (108) on its first surface, and a ground plane on its second surface which help form a microstrip resonator. The first and second substrates are attached with the transmission lines (108) resting inside of the areas defined by cavity areas (104). By providing an air gap on top of transmission lines (108), the microstrip assembly (100) can exhibit enhanced characteristics, while still maintaining the high Q characteristics of a microstrip.
    Type: Grant
    Filed: May 19, 1993
    Date of Patent: November 8, 1994
    Assignee: Motorola, Inc.
    Inventors: Mark A. Crandall, William J. Wingfield, Leng H. Ooi
  • Patent number: 5358798
    Abstract: A battery assembly (10) includes at least one battery cell (12) and a circuit carrier (15) in thermal proximity to the at least one battery cell (12). Located on circuit carrier (15) is a thermal fuse (18) which is formed from an electrically conductive resilient material such as beryllium copper. At least one end of the thermal fuse is coupled in a deflected state to a solder pad (20) located on circuit carrier (15) using a low temperature conductive adhesive such as low temperature solder (24). When the temperature of the at least one battery cell (12) reaches a predetermined trip point, the one end of the thermal fuse releases away from solder pad (20) due to the heat transfer from the at least one battery cell, thereby electrically disconnecting the at least one battery cell (12) from battery terminal (23).
    Type: Grant
    Filed: December 6, 1993
    Date of Patent: October 25, 1994
    Assignee: Motorola, Inc.
    Inventors: Raymond J. Kleinert, III, Michael P. Cicci, Russell E. Gyenes
  • Patent number: 5357218
    Abstract: A shielded microstrip assembly (100)includes a substrate 102 having a first ground plane surface (106) and a second surface (206) which includes a transmission line (216). A plurality of solder balls (104) provide electrical interconnection for the ground plane and for the terminals (210) and (212) of transmission line (216). The microstrip assembly (100) is then inverted and attached using solder balls (104) to a carrier (302). The inverted microstrip assembly (100) of the present invention provides for improved shielding, while maintaining the high Q and other advantages associated with a microstrip.
    Type: Grant
    Filed: May 3, 1993
    Date of Patent: October 18, 1994
    Assignee: Motorola, Inc.
    Inventors: William J. Wingfield, Mark A. Crandall, Leng H. Ooi
  • Patent number: 5357561
    Abstract: The present invention allows for a communication device (136) which roams within a communication system (100), the ability of maintaining in contact with other communication units, even while the unit is away from its home sub-system. Communication system (100) comprises a wide area paging system which includes a wide area paging controller (184) which controls at least one local area paging controller (108, 182 and 156). When a communication unit is away from its home system, the home system sends out a page via the wide area paging system in order to locate the communication unit and direct the unit to a local sub-system which the unit can use to communicate with the calling unit.
    Type: Grant
    Filed: July 10, 1992
    Date of Patent: October 18, 1994
    Assignee: Motorola, Inc.
    Inventor: Gary W. Grube
  • Patent number: 5355524
    Abstract: A single chip receiver/transmitter section (202) includes an antenna switch (208), a low noise amplifier (210), a power amplifier (212) and a first (214) and second (216) mixers. The antenna switch (206)includes an antenna terminal (256) which is coupled to an off-chip band pass filter (206) which provides all of the selectivity for radio (200). Also described is a transmitter/receiver structure (300) which incorporates a transmission line filter such as band pass filter (206) formed by substrates (304) and (306) and includes the single chip transmitter/receiver section (202) imbedded inside of the structure (300).
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: October 11, 1994
    Assignee: Motorola, Inc.
    Inventor: Robert J. Higgins, Jr.
  • Patent number: 5343213
    Abstract: An extendable antenna assembly allows for snap-in assembly and quick disconnection thereby saving both time and money in antenna assembly and replacement. The extendable antenna assembly includes an extendable radiating half-wavelength antenna (108) and a helical quarter wavelength antenna (300). The helical antenna (300) includes an antenna section (112) and a support section which includes a number of resilient leg members (116). Some of the leg members (116) include snaps (118) which engage with retention areas (122) which are found in the radio housing (120). A guide tube (102) having a flared top section (124) is found inside the radio (100) and provides for a way of compressing the individual leg members (116) thereby, releasing the extendable antenna assembly from the radio housing (120) when the antenna assembly requires removal.
    Type: Grant
    Filed: October 22, 1991
    Date of Patent: August 30, 1994
    Assignee: Motorola, Inc.
    Inventors: Wilfried E. Kottke, Jill C. Olkoski
  • Patent number: 5335133
    Abstract: Battery (300) includes a first redundant limiting circuit (302) for limiting the voltage and current levels which are outputted by the first limited battery output (308). A second redundant limiting circuit (304) provides for a second limited battery output (310). Connected to both the first (308) and second (310) battery outputs is a fault monitoring circuit (306), which monitors for any faults such as electrical shorts, occurring at any of the two battery outputs (308 or 310). The fault monitoring circuit (306) interrupts the appropriate output, if a fault, or a current limiting condition occurs. Battery (300) allows for radios which would otherwise not be able to achieve intrinsic safe level approvals to attain such approvals.
    Type: Grant
    Filed: November 29, 1991
    Date of Patent: August 2, 1994
    Assignee: Motorola, Inc.
    Inventors: Michael R. Bishop, David H. Minasi
  • Patent number: 5333205
    Abstract: A microphone assembly (134) includes a movable diaphragm (124) and a linear light gradient (130) which causes the movement of diaphragm (124) to be translated into a corresponding amplitude of light to be received at a photo-detector (116). Thereby providing for a fully optical microphone assembly which is immune to radio frequency interference and resistance losses.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: July 26, 1994
    Assignee: Motorola, Inc.
    Inventors: Henry A. Bogut, Joseph Patino
  • Patent number: 5331268
    Abstract: A charger (302) determines the voltage baseline of a battery (306) and establishes a voltage range based on the voltage baseline of battery (306). Once the rapid charge rate has terminated and the trickle charge rate commenced, charger (302) monitors the voltage of the battery in order to make sure the battery is not being depleted. If the battery voltage is above the established range, the trickle charge rate is decreased, and if the battery voltage is below the voltage range, the trickle charge rate is increased.
    Type: Grant
    Filed: August 2, 1993
    Date of Patent: July 19, 1994
    Assignee: Motorola, Inc.
    Inventors: Joseph Patino, Daniel M. Nigro, John D. Fiske, II
  • Patent number: D349485
    Type: Grant
    Filed: September 7, 1993
    Date of Patent: August 9, 1994
    Assignee: Motorola, Inc.
    Inventors: Scott H. Richards, Craig F. Siddoway
  • Patent number: D354287
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: January 10, 1995
    Assignee: Motorola, Inc.
    Inventor: Masaru Tokiyama