Stephen H Hoffman

US Patent:

6443574, Sep 3, 2002

Filed:

Jul 24, 2001

Appl. No.:

09/912104

Inventors:

Brian Reece Howell - Lake Orion MI
Christopher Eugene Andrews - South Lyon MI
John Michael Dicky - Dearborn MI
Stephen Wayne Hoffman - Riverview MI
Sachin V. Shah - Troy MI
Thomas Norfork, Jr. - Southfield MI

Assignee:

Visteon Global Technologies, Inc. - Dearborn MI

International Classification:

G03B 2100

US Classification:

353 13, 353 72, 345649

Abstract:

A removable vehicle entertainment system is provided. The system includes a video display screen for displaying entertainment to an occupant of the vehicle. The system can be removed from the docking bracket in the vehicle, and attached to an external docking station such that the system can be used independently of the power supply and speakers of the vehicle. Further, the system can be used as a self-contained personal entertainment system. The system includes mechanical and/or electrical componentry that determines the orientation of the video display screen, and allows the electronics of the system to display an image on the screen in an appropriate orientation, thus avoiding upside-down images in the various uses of the system.

US Patent:

20090163162, Jun 25, 2009

Filed:

Dec 19, 2007

Appl. No.:

11/959929

Inventors:

Stephen W. Hoffman - Riverview MI, US
J. William Whikehart - Milford MI, US
Shaun D. Kalinowski - Van Buren Twp. MI, US

International Classification:

H04B 17/00

US Classification:

4552261

Abstract:

A direct conversion receiver with an integrated self alignment tuner. The system includes a tank circuit, an analog to digital converter, a digital down converter, a digital up converter, a local oscillator, and a digital to analog converter. The tank circuit receives a radio frequency signal from an antenna input. The analog to digital converter is connected to the tank circuit to digitize the tank output signal and generate a corresponding digital signal. The digital down converter is in communication with the analog to digital converter and generates an intermediate frequency signal based on the digital signal and the output of the local oscillator. The digital up converter is in communication with the digital to analog converter to generate a radio frequency test signal, where the digital to analog converter provides the radio frequency test signal to the antenna input.

US Patent:

49673980, Oct 30, 1990

Filed:

Aug 9, 1989

Appl. No.:

7/390952

Inventors:

Saad A. Jamoua - Oak Park MI
Stephen W. Hoffman - Riverview MI

Assignee:

Ford Motor Company - Dearborn MI

International Classification:

G11C 700

US Classification:

36523005

Abstract:

A dual port, random access, read/write memory is provided such that each microprocessor can access shared memory locations without regard to the state of the other microprocessor. Previously known dual port systems use delays, called wait states, or handshaking techniques to control memory acces and to resolve overlapping memory access requests. This invention avoids the need for special timing controls by improving memory response time. Once a valid address is placed on the address bus by the microprocessor, which is recognized by the memory as being within its range of assigned address values, the memory prefetches the data at that address may soon follow. If it does, then the data is placed on the data bus. If it does not, then the prefeteched data is ignored and a write operation takes place for the particular address.