Mark R Hansen

US Patent:

53253140, Jun 28, 1994

Filed:

Sep 11, 1992

Appl. No.:

7/944140

Inventors:

Raymond Lippmann - Ann Arbor MI
James E. Nelson - Waterford MI
Michael J. Schnars - Clarkston MI
James R. Chintyan - Davison MI
Mark C. Hansen - Ann Arbor MI

Assignee:

Delco Electronics Corporation - Kokomo IN

International Classification:

G06F 1300
G06F 1520

US Classification:

36457104

Abstract:

An apparatus for applying a curve transfer function to an input signal comprises a first set of memory for storing values representing boundary points or distance differences along a curve of the transfer function, a second set of memory for storing slope values of lines connecting adjacent boundary points along the curve, a counter unit for maintaining a position count indicating position along the curve of the transfer function with respect to the stored boundary point values, an addressing unit, responsive to the position count, for selecting, from the second set of memory memory, the slope value corresponding to the position count, an accumulator for adding the selected slope value to an accumulator output value; and a comparator and data latch for determining when the accumulator output value corresponds to the input signal, and for selecting the corresponding accumulator output value as an output signal representing the application of the curve transfer function to the input signal.

US Patent:

53943449, Feb 28, 1995

Filed:

Sep 11, 1992

Appl. No.:

7/944158

Inventors:

Raymond Lippmann - Ann Arbor MI
James E. Nelson - Waterford MI
Michael J. Schnars - Clarkston MI
James R. Chintyan - Davison MI
Mark C. Hansen - Ann Arbor MI
James M. Aralis - Mission Viejo CA
Frank J. Bohac - Laguna Hills CA

Assignee:

Delco Electronics Corporation - Kokomo IN

International Classification:

G01C 2500

US Classification:

36457102

Abstract:

An apparatus for processing data, such as liquid level data in a motor vehicle containing a liquid storage tank, comprises a liquid level sensor for developing a signal indicative of instantaneous liquid level in the storage tank, circuitry for processing the instantaneous liquid level signal, including asymmetrical filtration of the instantaneous liquid level signal, to provide a process output signal, and a display apparatus for displaying an indication of the level of liquid in the storage tank in response to the process output signal.

US Patent:

54084180, Apr 18, 1995

Filed:

Sep 11, 1992

Appl. No.:

7/944154

Inventors:

Raymond Lippmann - Ann Arbor MI
James E. Nelson - Waterford MI
Michael J. Schnars - Clarkston MI
James R. Chintyan - Davison MI
Mark C. Hansen - Ann Arbor MI

Assignee:

Delco Electronics Corporation - Kokomo IN

International Classification:

G01C 2500

US Classification:

364509

Abstract:

An apparatus for fuel level display systems comprises a fuel level sender providing a fuel level signal, a short period filter for filtering the fuel level signal through a short time constant filter, a long period filter for filtering the fuel level signal through a long time constant filter, a signal selector for selecting the long period filter output if the fuel level is above a trip point and for selecting the short period filter if the fuel level is below the trip point, and a display device for displaying a level of fuel in the tank in response to the selected signal.

US Patent:

53453980, Sep 6, 1994

Filed:

Sep 11, 1992

Appl. No.:

7/943964

Inventors:

Raymond Lippmann - Ann Arbor MI
James E. Nelson - Waterford MI
Michael J. Schnars - Clarkston MI
James R. Chintyan - Davison MI
Mark C. Hansen - Ann Arbor MI

Assignee:

Delco Electronics Corporation - Kokomo IN

International Classification:

G01F 2336

US Classification:

364509

Abstract:

A circuit apparatus for providing increased apparent resolution in digital signal processing systems includes a comparison circuit receiving an N bit digital input signal and the N most significant bits of an N+M bit output signal. The comparison circuit compares the two signals and provides a control output in response to the comparison. An N+M bit counter increases or decreases a count value which is the output signal in response to the comparison, whereby the output signal has an apparent resolution 2. sup. M better than the resolution of the input signal.

US Patent:

50799452, Jan 14, 1992

Filed:

Jan 23, 1991

Appl. No.:

7/645067

Inventors:

Mark C. Hansen - Ann Arbor MI
Richard J. Jakupco - Kokomo IN
Michael L. Whitethorn - Kokomo IN

Assignee:

Delco Electronics Corporation - Kokomo IN

International Classification:

G01M 1500

US Classification:

73116

Abstract:

Apparatus for detecting the direction of rotation of a crankshaft of an internal combustion engine. The crankshaft drives wheels associated with sensors for developing two pulse trains as the crankshaft rotates. One pulse train is a square wave having consecutively occurring high and low periods of equal angular duration. The other pulse train is a square wave having a plurality of spaced window pulses of unequal angular duration. The relative high and low logic states of the pulse trains at certain window locations has one relationship for forward movement of the crankshaft and a different relationship for reverse movement of the crankshaft. These relationships are detected. At one of the window locations, the relative high and low logic states of the pulse trains is the same for either forward or reverse rotation. Engine reversal at this location is detected by detecting the occurrence of two consecutively occurring relative logic states that are the same.

US Patent:

54593980, Oct 17, 1995

Filed:

Dec 17, 1993

Appl. No.:

8/168298

Inventors:

Mark C. Hansen - Ann Arbor MI
Roger D. Allison - Kokomo IN
Thomas D. Cook - Kokomo IN
Walter K. Kosiak - Kokomo IN

Assignee:

Delco Electronics Corporation - Kokomo IN

International Classification:

G01F 3489

US Classification:

324166

Abstract:

An adaptive threshold circuit for use with a magnetic type of sensor that has a pick-up coil. The pick-up coil has an alternating voltage induced therein when a slot formed in a wheel rotates past the sensor. The circuit produces a square wave pulse voltage during positive half-cycles of the voltage generated in the pick-up coil. The circuit includes a digital to analog converter the input of which is connected to a pulse counter. The output of the converter is a function of the count magnitude in the counter and provides a variable threshold voltage that is compared by a voltage comparator with a voltage that is a function of the magnitude of the voltage generated in the pick-up coil. The circuit has an input circuit connected to the pick-up coil that includes a voltage attenuating circuit and a diode. The pulse count of the counter is, at times, incremented under control of a comparator that compares the output voltage of the converter with a voltage that is a function of the magnitude of the voltage generated in the pick-up coil.

US Patent:

55549489, Sep 10, 1996

Filed:

May 31, 1994

Appl. No.:

8/251499

Inventors:

Mark C. Hansen - Ann Arbor MI
Walter K. Kosiak - Kokomo IN

Assignee:

Delco Electronics Corporation - Kokomo IN

International Classification:

G01P 3489
H03K 501
H03K 906

US Classification:

327181

Abstract:

An adaptive threshold circuit for use with a magnetic type of sensor that has a pick-up coil. The pick-up coil has an alternating voltage induced therein when a slot or tooth formed in a wheel rotates past the sensor. The circuit produces a square wave pulse voltage during positive half-cycles of the voltage generated in the pick-up coil. The circuit includes a digital to analog converter the input of which is connected to a selectable pulse counter. The pulse counter has a decrement function that allows for the count to be varied so as to accommodate sudden wheel decelerations. According to one embodiment, the counter may down count to reduce the count number. In accordance with a second embodiment, the counter may shift out one bit to perform a divide-by-two operation on the count number. The output of the converter is a function of the count magnitude in the counter and provides a variable threshold voltage that is compared by a voltage comparator with a voltage that is a function of the magnitude of the voltage generated in the pick-up coil. The circuit has an input circuit connected to the pick-up coil that includes a voltage attenuating circuit and a diode.

US Patent:

53715004, Dec 6, 1994

Filed:

Sep 11, 1992

Appl. No.:

7/944145

Inventors:

Raymond Lippmann - Ann Arbor MI
James E. Nelson - Waterford MI
Michael J. Schnars - Clarkston MI
James R. Chintyan - Davison MI
Mark C. Hansen - Ann Arbor MI
Edward H. Honnigford - Russiaville IN

Assignee:

Delco Electronics Corporation - Kokomo IN

International Classification:

H03M 112
H03M 178
H03M 106

US Classification:

341155

Abstract:

A circuit apparatus comprises interface circuitry between analog and digital circuitry. A multiple reference circuit provides a variety of reference voltage signals. The multiple reference circuitry is coupled to a selection circuit that selectively couples one of the reference voltage signals to a first reference input of the interface circuitry and selectively couples another of the reference voltage signals to a second reference input of the interface circuitry, whereby the first and second reference inputs may be selectively coupled to the reference voltages and the circuit maintains a ratiometric relationship between the digital and analog circuitry.