Patents by Inventor Charles R. Thurber, Jr.

Charles R. Thurber, Jr. 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: 6512411
    Abstract: A mode transitioning system (10) for a charge pump (12), which may optionally be embodied in an integrated circuit (28). A number of switches (30a-i) are operated based on an input detection sub-circuit (32) and an output detection sub-circuit (34) to controllably connect a number of flying capacitors (24, 26) in a variety of manners producing alternate input voltage to output voltage step ratios. One example embodiment of the mode transitioning system (10) proceeds from an idle state (52a), through start-up and fault testing states (52b-c), and then selects among alternate step-down ratios of 1:1, 2:3, and 1:2 based on suitability and efficiency for respective operating states (52d-f).
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: January 28, 2003
    Assignee: Maxim Integrated Products, Inc.
    Inventors: David D. Meng, Charles R. Thurber, Jr.
  • Patent number: 6169444
    Abstract: A regulating system (10) for a charge pump (12) employing a detection sub-circuit (28) and an enable sub-circuit (30) to operate an oscillator (26) and a channel-switching sub-circuit (32) in an automatic manner producing many of the advantages of previously unreconcilable skip mode and constant frequency mode type regulation. The detection sub-circuit (28) compares a feedback signal (52) from the output terminal (18) of the charge pump (12) to a reference signal (56) and produces an error signal (42) representative of output voltage deviation. Concurrently, the enable sub-circuit (30) compares a threshold signal (72) set for a minimum energy quanta which it is efficient for the flying capacitor (24) of the charge pump (12) to transfer to the error signal (42) and produces an enable signal (38) to enable the oscillator (26).
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: January 2, 2001
    Assignee: MAXIM Integrated Products, Inc.
    Inventor: Charles R. Thurber, Jr.
  • Patent number: 5414314
    Abstract: An integrated CMOS high swing interface output stage which can transmit and receive data from other devices which may include devices operating from a different, particularly a higher, voltage power supply. The interface utilizes three P-channel devices in a common well on the substrate and three N-channel devices in another common well on the substrate. Two of the three P-channel devices are connected in series between the positive power supply terminal and the output of the interface and two of the N-channel devices are connected in series between the output of the interface and a negative power supply terminal. The third P-channel device is connected between the common connection of all three P-channel devices and the local substrate and the gate of the P-channel device which is connected to the positive power supply terminal.
    Type: Grant
    Filed: June 9, 1994
    Date of Patent: May 9, 1995
    Assignee: Maxim Integrated Products
    Inventor: Charles R. Thurber, Jr.
  • Patent number: 4658198
    Abstract: A charging circuit is provided to decrease the settling time of a reference capacitor storing a reference voltage for data acquisition circuits. The charging circuit includes one or more comparator circuits for comparing the voltage across the reference capacitor to the reference voltage provided by a reference source. If the voltage from the reference source deviates by a predetermined amount, one or more buffer circuits rapidly charge the reference capacitor to a voltage substantially equal to the new reference voltage. The reference source is then coupled directly to the capacitor to complete the charging of the capacitor to the new reference voltage.
    Type: Grant
    Filed: August 16, 1985
    Date of Patent: April 14, 1987
    Assignee: Intersil, Inc.
    Inventor: Charles R. Thurber, Jr.
  • Patent number: 4656459
    Abstract: Conversion is achieved by subdividing the intergrate and deintegrate periods into a plurality of integrate and deintegrate phases. Power frequency rejection can be maintained by defining the combined integrate phases to integrate over at least one complete power line cycle. Sychronization of the integrate phases with the power line cycle is maintained by separating integrate phases with a combined deintegrate and rest phase of fixed duration.
    Type: Grant
    Filed: October 7, 1985
    Date of Patent: April 7, 1987
    Assignee: Intersil, Inc.
    Inventor: Charles R. Thurber, Jr.