SCOTT BIRK KESLER
Pilots at Pavalion Dr, Kokomo, IN

6369646, Apr 9, 2002

Jan 29, 2001

09/771056

Scott B. Kesler - Kokomo IN
Thomas L. Dinkledine - Russiaville IN

Delphi Technologies, Inc. - Troy MI

H01L 2500

327564, 327578

A compensation circuit provides a compensation current to a node of an integrated circuit that experiences increased reverse-bias leakage current between a n-type leaking epitaxial region and a p-type substrate with increased temperature. The compensation circuit includes a p-type substrate, a n-type compensator epitaxial region, an contact region, a center p-type region and a plurality of peripheral p-type regions. The peripheral p-type regions function as either a node collector or a reference collector. The compensation current is substantially determined by the ratio of the total peripheral surface area facing the center p-type region associated with the node collector and the total peripheral surface area facing the center p-type region associated with the reference collector and is also determined by the total surface area of the n-type compensator epitaxial region.

6450157, Sep 17, 2002

Jul 3, 2000

09/609797

Scott B. Kesler - Kokomo IN
John W. Boyer - Westfield IN

Delphi Technologies, Inc. - Troy MI

F02P 1100

123630, 123632, 315209 M

An automotive ignition system includes a control circuit ( ) operable to drive a coil current switching device ( ) connected to an ignition coil ( ) referenced at battery voltage. The control circuit ( ) includes a drive circuit ( ) and ring damping circuit ( ) producing an inhibit signal (INH) to which the drive circuit ( ) is responsive to control the state of the coil drive signal (GD). In a single pulse ignition system; i. e. , an ignition system employing a single coil charging event per combustion cycle, the ring damping circuit ( ) is responsive to a spark control signal (ESTBF) to control charging and discharging of a single capacitor (C ) to define the inhibit signal (INH). In a multiple pulse ignition system; i. e. , an ignition system employing multiple coil recharging cycles following a standard initial charging dwell cycle, the ring damping circuit ( ) is responsive to the spark control signal (ESTBF) and at least two mode signals (M M ) to control charging and discharging of the single capacitor (C ) throughout the initial and subsequent coil charging cycles to define the inhibit signal (INH). In either case, the drive circuit ( ) is responsive to the inhibit signal (INH) to disable current flow through the primary ignition coil ( ) when the inhibit signal (INH) is enabled, and to enable current flow through the primary ignition coil ( ) when the inhibit signal (INH) is disabled.

6668811, Dec 30, 2003

Jun 30, 2000

09/607752

Scott B. Kesler - Kokomo IN

Delphi Technologies, Inc. - Troy MI

F02P 312

123644, 123609

An automotive ignition system ( ) includes a control circuit ( ) operable to drive a coil current switching device ( ) connected between an ignition coil ( ) referenced at battery voltage (V ) and a sense resistor (R ) referenced at ground potential. The control circuit ( ) includes a drive circuit ( ) and voltage trip circuit ( ) defining a reference voltage (V ) for comparison with a sense voltage (V ) developed across the sense resistor (R ) due to increasing coil current (I ) through the ignition coil ( ). As the sense voltage (V ) increases to the reference voltage (V ), the voltage trip circuit ( ) produces a trip voltage signal (V ) to which the drive circuit ( ) is responsive to deactivate the coil current switching device ( ). The voltage trip circuit ( ) is configured such that the reference voltage (V ) is temperature and battery voltage, and optionally engine speed, dependent. The trip voltage signal (V ) thus carries this same dependency so that ignition coil charging time may be.

5139004, Aug 18, 1992

Sep 25, 1991

7/765086

Mark W. Gose - Kokomo IN
Scott B. Kesler - Kokomo IN

Delco Electronics Corporation - Kokomo IN

F02P 305, F02P 3045

123644

An ignition system for a spark-ignited internal combustion engine has a transistor connected in series with the primary winding of an ignition coil. The transistor is switched ON and OFF in synchronism with rotation of the crankshaft of the engine. Primary winding current is sensed by a resistor and the voltage developed across the resistor is fed back into an error amplifier which causes the transistor to be biased into a current-limiting mode when primary winding current increases to a predetermined level. The feedback loop has a capacitor which is a feedback compensation element. This capacitor, together with a resistor form an RC timing circuit which is operative at times to prevent the transistor from being biased back ON for a predetermined time period after it has been biased OFF.

7013882, Mar 21, 2006

Aug 26, 2003

10/647946

Jerral A. Long - Kokomo IN, US
Scott B. Kesler - Kokomo IN, US

Delphi Technologies, Inc. - Troy MI

F02P 9/00

123609, 123630

An ignition control circuit () is responsive to a control signal (ESTC) to apply a drive signal (GD) to a power switching device () to conduct ignition coil current (I) therethrough. A resistor (R) included within the circuit () receives, and dissipates heat generated by, the coil current (I). The circuit () includes a first transistor (Q) positioned adjacent to the resistor (R) such that an operating temperature thereof is near that of the resistor (R), and a second transistor (Q) positioned remote from the resistor (R) and having an operating temperature defining a reference temperature. The first and second transistors (Q, Q) are configured to produce an output voltage (V) proportional to a difference in operating temperatures thereof, and a latch circuit (L) disables the control signal (ESTC) to thereby turn off the power switching device () when the output voltage (V) difference exceeds a reference voltage (V).

6304423, Oct 16, 2001

Jun 8, 1999

9/327741

Jerral Alan Long - Kokomo IN
Scott Birk Kesler - Kokomo IN
Michael Joseph Huemmer - Kokomo IN

Delphi Technologies, Inc. - Troy MI

H02H 322

361111

A transient protection circuit (14) includes a resistor (22) having a first end adapted for connection to a first signal line (16) of a voltage supply (12) and a second opposite end connected to a voltage supply input (20) of an application circuit (18). In one embodiment, the resistor (22) defines an emitter (26) of a PNP transistor (24) having a floating base (28) and a collector (30) adapted for connection to a reference signal line (15) of the voltage supply (12). In an alternative embodiment (14'), the emitter (26) of the PNP transistor (24) is connected to the first end of the resistor (22). The transient protection circuit (14, 14') is preferably formed on a monolithic integrated circuit including the application circuit (18) wherein a semiconductor layer (46) defining the first input to the resistor (22) also defines a bond pad (50). The corners of the semiconductor layer (46) including those of the bond pad (50) are configured to equalize the electric field about the entire outer periphery of the semiconductor layer (46). The transient protection circuit (14, 14') is operable to protect the application circuit (18) from transient and other fault conditions associated with the voltage supply (12) including transient voltage spikes, load dump conditions, electrostatic discharge (ESD) events, reverse battery conditions and discharge events from an ignition coil secondary.

6130582, Oct 10, 2000

Dec 4, 1998

9/205314

Scott Birk Kesler - Kokomo IN

Delco Electronics Corporation - Kokomo IN

H03F 130

330290

An amplifier circuit (14') for canceling variations in an amplifier feedback signal includes compensation circuitry (50) defining a replica of the feedback current therethrough. The replicated feedback current is drawn from a circuit node (N1) which directs the feedback signal to a differential pair (Q1, Q2) of the amplifier circuit 14', whereby any biasing effects on the differential pair (Q1, Q2) due to changes in the feedback signal resulting from changes in a gate drive output voltage (V. sub. GD) of the amplifier circuit (14') are eliminated. Accordingly, the gate drive output voltage (V. sub. GD) may be used to control an ignition coil (L1) drive transistor (16) whereby any changes in gate drive voltage (V. sub. GD) will not cause the coil current (I. sub. L) to deviate from its target coil current limit value.

7511545, Mar 31, 2009

Sep 13, 2007

11/900768

Scott B. Kesler - Kokomo IN, US

Delphi Technologies, Inc. - Troy MI

H03K 3/017, H03K 5/04, H03K 7/08

327175, 327172, 327184

An analog, duty cycle replicating frequency converter extracts duty cycle information from an input, pulse width modulated signal and generates an output pulse width modulated signal of the same duty cycle at a different frequency without regard to the frequency of the input signal. It uses bipolar transistor based circuitry, adaptable to an application specific integrated circuit, to derive voltages representing the on-time and period durations of the input signal, convert these voltages to currents representing the logarithms thereof, generate a voltage representing the difference between the currents, exponentially convert the voltage to a current representing the duty cycle and control an oscillator to generate an output pulse width modulated signal at a predetermined frequency with the duty cycle of the input signal.

7675346, Mar 9, 2010

Jul 11, 2006

11/484502

Scott B. Kesler - Kokomo IN, US

Delphi Technologies, Inc. - Troy MI

H03K 17/04

327376, 327108, 327434

A switching control system and method is provided that optimizes switching efficiencies for power switching applications including automotive ignition systems, solenoid drivers, motor drivers and power regulation systems. In an ignition system, a coil current switching magnitude is controlled at the start of ignition coil charging, thereby avoiding an untimely spark event. When the transistor threshold voltage is reached, the collapse rate of the ignition system transistor collector voltage is reduced by reducing the gate charging current. The reduced collector voltage slew rate results in a reduced primary and secondary coil output voltage. After the collector voltage collapses, a continued rapid charge is provided to place the transistor in a hard saturation bias condition. In an aspect, the present invention dynamically determines the threshold voltage of a power transistor. A mirror capacitor substantially matches a transistor gate voltage and a signal is generated when the mirror capacitor voltage proportionally exceeds the transistor gate voltage as a consequence of the transistor reaching a threshold voltage.

7159583, Jan 9, 2007

Oct 26, 2004

10/973769

Duane E. Beyler - Sharpsville IN, US
Scott B. Kesler - Kokomo IN, US

Delphi Technologies, Inc. - Troy MI

F02P 1/00, F02P 3/06

123644, 123594

Drive current stabilization is achieved through the management of a drive current. The drive current may include a control current that is provided to a control terminal of a switch, a current limit input current that is provided to a current limit circuit associated with the switch and a stabilization current. The switch carries a load current responsive to a control signal on the control terminal. The magnitude of the control current is monitored and a magnitude of the stabilization current is increased responsive to a decrease in the magnitude of the control current to substantially maintain a magnitude of the drive current.