Patents by Inventor Darrell Eugene Davis

Darrell Eugene Davis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8253573
    Abstract: An alarm unit for monitoring or detecting presence of an analyte on a separate sensor portion. The present invention comprises only the alarm unit and its means for attachment to a user's clothing. A square plastic casing protects the alarm electronics portion including a signal processing means. A large clip attachment means is included that is easily separated and attached from the casing and is used to attach the unit to clothing and which has enough clearance to be used with thick articles of clothing including diapers and which has a set of teeth frictionally held against a rubber strip portion located on the casing back so as to also enable secure attachment to very thin articles of clothing. A three-way switch is located externally for easy alarm chime and alarm volume selection.
    Type: Grant
    Filed: March 25, 2010
    Date of Patent: August 28, 2012
    Inventors: Saket Subash Bhatia, Darrell Eugene Davis
  • Publication number: 20110234400
    Abstract: An alarm unit for monitoring or detecting presence of an analyte on a separate sensor portion. The present invention comprises only the alarm unit and its means for attachment to a user's clothing. A square plastic casing protects the alarm electronics portion including a signal processing means. A large clip attachment means is included that is easily separated and attached from the casing and is used to attach the unit to clothing and which has enough clearance to be used with thick articles of clothing including diapers and which has a set of teeth frictionally held against a rubber strip portion located on the casing back so as to also enable secure attachment to very thin articles of clothing. A three-way switch is located externally for easy alarm chime and alarm volume selection.
    Type: Application
    Filed: March 25, 2010
    Publication date: September 29, 2011
    Inventors: Saket Subash Bhatia, Darrell Eugene Davis
  • Patent number: 6100730
    Abstract: A prescaler system (100) has a prescaler circuit (102) coupled to a divider (104), wherein the divider includes an improved dynamic flip flop divider (118). The divider (118) includes a TSPC nine-transistor D-flip-flop (10). The divider further includes a tenth transistor such as N channel device (41) having a source coupled to ground (43), a drain coupled to a junction between a drain of a P channel device (34) and a drain of another N channel device (37). The divider also includes an eleventh transistor such as N channel device (42) having a source coupled to ground and a drain coupled to a junction between the drain of a P channel device (35) and the drain of a N channel device (39), the junction providing a feedback signal to a N channel device (36), wherein the eleventh transistor further has a gate coupled to the output signal (/Q.sub.A).
    Type: Grant
    Filed: November 30, 1998
    Date of Patent: August 8, 2000
    Assignee: Motorola
    Inventors: Darrell Eugene Davis, Scott Robert Humphreys
  • Patent number: 6064869
    Abstract: A synthesizer (100) is used for generating a plurality of synthesized clock signals (128, 156). The synthesizer includes a clock source (102) for generating a common frequency reference signal (103), and a clock generator (104) coupled to the common frequency reference signal for generating a plurality of generated clock signals (106, 108), wherein each of the plurality of generated clock signals is offset from each other by a predetermined phase offset (189, 192). In addition, the synthesizer includes a plurality of PLLs (Phase Locked Loops) (166-168) for generating a selected one of the plurality of synthesized clock signals, wherein each of the plurality of PLLs is coupled to, and operates from, a corresponding one of the plurality of generated clock signals, and wherein the predetermined phase offset between each of the plurality of generated clock signals is known to suppress noise between the plurality of PLLs operating therefrom.
    Type: Grant
    Filed: March 2, 1998
    Date of Patent: May 16, 2000
    Assignee: Motorola, Inc.
    Inventors: Darrell Eugene Davis, Scott Robert Humphreys
  • Patent number: 5939911
    Abstract: A low input prescaler (800) that is responsive to input signals having low amplitude alternating current (AC) components includes a switched tunable prescaler (280) that generates a prescaler output signal (221) having a prescaler output frequency during an operational state of the prescaler and having a free-running frequency that is responsive to a tuning control signal (216) during a tuning state of the prescaler. A frequency comparator (235) generates a comparator output in response to a difference between a reference frequency and the prescaler output frequency. A prescaler tuner (290, 390) adjusts the tuning control signal in response to the comparator output during the tuning state to minimize the difference between the reference frequency and the prescaler output frequency, and holds the tuning control signal during the operational state. The prescaler is used in phase lock loops (200, 400, 600) and other circuits.
    Type: Grant
    Filed: March 5, 1998
    Date of Patent: August 17, 1999
    Assignee: Motorola, Inc.
    Inventors: Scott Robert Humphreys, Darrell Eugene Davis, Barry W. Herold