MICHAEL DANA GEREN
Pilots at Treadstone Ct, Suwanee, GA

6819083, Nov 16, 2004

Apr 25, 2003

10/424017

Joseph Patino - Pembroke Pines FL
Michael D. Geren - Suwanee GA

Motorola, Inc. - Schaumburg IL

H01M 1044

320134, 320150

A protection circuit ( ) for use with a battery operated device ( ) which includes an over temperature detector ( ), a controller ( ), and a voltage divider circuit ( and ). The voltage divider circuit includes a multi-use thermistor ( ) for monitoring a temperature of a battery cell ( ), a battery charger, or a battery operated device. Further, the thermistor can be operatively connected to the over temperature detector. An input voltage at the input ( ) of the over temperature detector can vary relative to a variance in the monitored temperature. The temperature detector can signal the controller to terminate the charging of the battery cell if the temperature exceeds a predefined value. The device discharge detector can signal the controller to terminate the discharging of the battery cell if the battery operated device determines a specific event such as water intrusion, circuit failure or a software problem.

6400587, Jun 4, 2002

Nov 28, 2001

09/995505

Michael D Geren - Suwanee GA
Ashok Patil - Duluth GA

Motorola, Inc. - Schaumburg IL

H02H 7122

363 5611, 363 2115

A clamp circuit for limiting output voltage from a power supply secondary inductor to a ground when a first secondary node has a first secondary node voltage above a predetermined value relative to ground includes a silicone controlled rectifier and a control circuit. The silicone controlled rectifier has a first anode that is electrically coupled to the first secondary node of the secondary inductor, a first cathode that is electrically coupled to the secondary ground, and a first gate. The control circuit is electrically coupled to the first secondary node and to the gate of the silicon controlled rectifier. The control circuit senses the first secondary node voltage and applies a control voltage to the gate of the silicon controlled rectifier when the first secondary node voltage is above the predetermined value. The control voltage is sufficient to drive the silicon controlled rectifier into a substantially conductive state so that the silicon controlled rectifier clamps the first secondary node by sinking substantially all current received from the first secondary node to the ground.

6771051, Aug 3, 2004

Jun 29, 2002

10/185095

John W. Oglesbee - Watkinsville GA
John E. Herrmann - Sugar Hill GA
Michael D. Geren - Suwanee GA
David M. Demuro - Snellville GA
Roger L. Boyer - Snellville GA

Motorola, Inc. - Schaumburg IL

H02J 716

320150

This invention includes a thermally stable, low-cost charging circuit for rechargeable batteries. The circuit includes a thermal control circuit that employs a temperature dependent component such as a thermistor or positive temperature coefficient device. The temperature dependent device is thermally coupled to a charging pass element, which is typically a power transistor. When the transistor enters a danger zone, which is a region of operation characterized by elevated power dissipation in the pass element, the thermal control circuit is actuated to regulate the pass element in a constant power mode until the circuit exits the danger zone.

7068012, Jun 27, 2006

Jun 29, 2005

11/169837

Michael D. Geren - Suwanee GA, US
Jennifer K. Collier - Meath, IE
John E. Herrmann - Sugar Hill GA, US

Motorola, Inc. - Schaumburg IL

H01M 10/46

320134, 320136

A battery protection circuit is provided that includes current monitoring circuit. The current monitoring circuit senses current flowing from a rechargeable cell. When the current exceeds a maximum value, the current monitoring circuit actuates, whereby opening a transistor. The transistor has a resistor coupled in parallel. When the transistor opens, current is forced through the resistor coupled in parallel with the transistor, thereby limiting the current to a maximum value. When the voltage across the resistor exceeds a predetermined threshold, an overcurrent condition is simulated in the lithium ion protection IC. The overcurrent condition causes a disconnect switch to open, thereby disconnecting the cell(s) from the external terminals. The circuit additionally includes three current blocking elements coupled between charging terminals and the cells to ensure that fault conditions occurring within the charger do not adversely affect the performance of either the cells or a host electronic device.

7145313, Dec 5, 2006

Jun 29, 2004

10/880209

Michael D. Geren - Suwanee GA, US
Jennifer K. Collier - Dunsany, IE
John E. Herrmann - Sugar Hill GA, US

Motorola Inc. - Schaumburg IL

H01M 10/46

320134

A battery protection circuit is provided that includes current monitoring circuit. The current monitoring circuit senses current flowing to or from a rechargeable cell. When the current exceeds a maximum value, the current monitoring circuit actuates, whereby opening a transistor. The transistor has a resistor couple in parallel. When the transistor opens, current is forced through the resistor coupled in parallel with the transistor, thereby limiting the current to a maximum value. The current monitoring circuit also simulates an overcurrent condition in the safety circuit. The overcurrent condition causes a disconnect switch to open, thereby disconnecting the cell(s) from the external terminals.

7096047, Aug 22, 2006

Nov 30, 2001

09/998103

Michael D. Geren - Suwanee GA, US
Reed William Leonard - Lawrenceville GA, US
Alay M. Mehta - Lawrenceville GA, US

Motorola, Inc. - Schaumburg IL

H04Q 7/20

4555691, 4555692, 455557

This invention offers an improved hands-free device for coupling to radio devices having mute and audio inputs. The invention couples serially between the radio and a portable electronic device such as a mobile telephone. The invention facilitates the delivery of appropriate audio signals to the radio. The invention also senses the activity of the portable electronic device and actuates a mute signal upon sensing such activity. The mute signal causes the radio to switch the input to its loudspeakers from a received signal to the audio being delivered by the invention from the portable electronic device. In so doing the invention offers an easy to install, inexpensive hands-free unit that takes advantage of the high fidelity loudspeakers in the automotive stereo system.

6091229, Jul 18, 2000

Mar 30, 1999

9/282705

John Wendell Oglesbee - Watkinsville GA
Michael D. Geren - Suwanee GA

Motorola, Inc. - Schaumburg IL

H02J 700

320137

A battery charger system (10) consisting of a power supply unit (20) and a battery charger unit (70). The power supply unit (20) features a current profile generator (26) that defines a current profile of the output current of the power supply unit (20). The battery charger system (10) provides a unique way of communicating charging current demand between the battery charger unit (70) and the power supply unit (20). The power supply unit (20) is capable of determining the charging current demand by detecting specific logical operating states of the battery charger unit (70), and comparing the current to a set threshold. The battery charger unit (70) communicates charging current demand to the power supply unit (20), and the power supply unit (20) responds by adjusting its output current to meet the required demand.

6054843, Apr 25, 2000

Jan 29, 1999

9/240478

John W. Oglesbee - Watkinsville GA
Michael D. Geren - Suwanee GA
Joseph Patino - Pembroke Pines FL

Motorola, Inc. - Schaumburg IL

H02J 700

320136

A battery charging system 100 is provided which comprises a charger 101 and a battery pack 102. The battery pack 102 comprises a battery cell or cells 150, memory means 140, temperature sensing means 147, and a high accuracy, high impedance voltage sensing means 112 that senses voltage directly at the battery cell terminals 151, 149. By sensing directly at the cell terminals 151, 149, charging error due to parasitic conductor impedances 132, 138 can be eliminated. The voltage sensing means 112 allows memory 140 and thermistor 147 data to be multiplexed, allowing the system to operate with four or fewer battery terminals.

2005026, Dec 8, 2005

Jun 5, 2004

10/861142

Michael Geren - Suwanee GA, US
John Oglesbee - Watkinsville GA, US
John Herrmann - Sugar Hill GA, US
Stephanie Smith - Norcross GA, US
Roger Boyer - Snellville GA, US

H02J007/00

320119000

A cell balancing circuit monitors the voltage between serially connected cells and compares it to a reference voltage. From that comparison, the cell balancing circuit sources or sinks current into a midpoint node between rechargeable cells to keep the cells balanced during the charging process. In one preferred embodiment, the cell balancing circuit includes an op-amp, connected in a unity gain configuration. A voltage divider establishes a reference voltage equal to the average of the two cell voltages. The op-amp compares this average to the measured voltage at the midpoint node. When the average voltage exceeds the voltage at the midpoint node, the op-amp sources current into the midpoint node. When the average voltage falls below the voltage at the midpoint node, the op-amp sinks current from the midpoint node. By sourcing or sinking current, the cell balancing circuit allows the lesser charged cell to catch up with the more fully charged cell.

2012013, Jun 7, 2012

Dec 3, 2010

12/959585

John W. Oglesbee - Watkinsville GA, US
Michael D. Geren - Suwanee GA, US
Dipti V. Desai - Lawrenceville GA, US
John E. Herrmann - Suwanee GA, US

Motorola, Inc. - Schaumburg IL

H02J 7/00, H01H 47/00

320107, 320137, 307130

Embodiments include a power supply arrangement where major components including an off-line switched power supply are shut off when not in use. When a load is coupled to the power supply arrangement, components are enabled so as to provide power to the load.