Richard E Frank

US Patent:

6816351, Nov 9, 2004

Filed:

Aug 29, 2002

Appl. No.:

10/230642

Inventors:

Richard Frank - Longmont CO
Denis Michel Darmon - Longmont CO

Assignee:

National Semiconductor Corporation - Santa Clara CA

International Classification:

H02H 504

US Classification:

361103, 361 938, 374163

Abstract:

A circuit is arranged to provide a thermal shutdown signal in response to an overtemperature condition. The thermal shutdown circuit is typically implemented in the same die as the circuitry that is to be protected. The thermal shutdown circuit provides a first current in response to a change in temperature when a VBE associated with a transistor decreases below a predetermined level. The first current is mirrored to provide a scaled current. A thermal shutdown signal is activated when the scaled current becomes greater than a reference current. The first current is increased in response to the activated thermal shutdown signal such that the thermal shutdown circuit is deactivated at a temperature that is lower than the temperature at which the circuit is activated. The thermal shutdown circuit is deactivated when the temperature of the die decreases.

US Patent:

7397677, Jul 8, 2008

Filed:

Feb 8, 2006

Appl. No.:

11/350674

Inventors:

Michael John Collins - Longmont CO, US
Richard Frank - Longmont CO, US

Assignee:

National Semiconductor Corporation - Santa Clara CA

International Classification:

H02M 3/18
G05F 1/62

US Classification:

363 60, 323271, 327536

Abstract:

A charge pump is provided. The charge pump may include an oscillator, a first switch, a second switch, a capacitor/switch network, an error amplifier, an adjustable resistance circuit, a first switch driver, and a second switch driver. In one embodiment, the first and second drivers each receive the oscillator voltage, and drive the first and second switches, respectively. Further, the adjustable resistance circuit is connected in series with the first and second switch circuits. The charge pump is arranged in a closed loop with the error amplifier driving the adjustable resistance circuit. The resistance of the adjustable resistance circuit is modulated to regulate the output voltage.

US Patent:

7780798, Aug 24, 2010

Filed:

Mar 29, 2007

Appl. No.:

11/693498

Inventors:

Jonathan S. Stinson - Plymouth MN, US
Matthew Cambronne - Mounds View MN, US
Richard B. Frank - Reading PA, US
Richard A. Gleixner - Wyomissing PA, US
James E. Heilmann - West Lawn PA, US

Assignee:

Boston Scientific Scimed, Inc. - Maple Grove MN
CRS Holdings, Inc. - Wilmington DE

International Classification:

C22C 38/40
C22C 38/44
C22C 5/04
C22C 28/00

US Classification:

148326, 148327, 148419, 623 115, 623924, 420 35, 420 43, 420468, 4205841, 4205861

Abstract:

Medical devices, such as endoprostheses, and methods of making the devices are disclosed. The endoprostheses comprise a tubular member capable of maintaining patency of a bodily vessel. The tubular member includes a mixture of at least two compositions, where the presence of the second composition gives the mixture a greater hardness than that of the first composition alone. The first composition includes less than about 25 weight percent chromium, less than about 7 weight percent molybdenum, from about 10 to about 35 weight percent nickel, and iron. The second composition is different from the first and is present from about 0. 1 weight percent to about 5 weight percent of the mixture.

US Patent:

46493760, Mar 10, 1987

Filed:

Jun 19, 1984

Appl. No.:

6/622070

Inventors:

Richard Frank - Milwaukee WI

International Classification:

G08B 1710

US Classification:

340691

Abstract:

A smoke alarm system has a smoke detector mounted to the ceiling of enclosure. The detector has audible and visual alarms. Special high intensity lamp units are mounted in remote relationship to the detector such as immediately adjacent to the opposite sides of an exit door and located to create a beam significantly below the normal smoke level at even advanced stages of combustion. The lamp units are coupled to the detector and operated thereby. The high intensity lamp units include a small battery driven Xenon lamp presently used for flash camera illumination and are activated to produce high intensity light bursts at a frequency such that the pulses are readily distinguishable but are sufficiently close to insure seeing by a person's rapid review of the environment. A tubular lamp is mounted on an electronic circuit board with an inverted U-shaped reflector and an outer plastic shell. The detector and lamp units are formed of extruded plastic bases, covers and end walls and having a battery recess in an end wall of the detector.