1
John D Cosgrove, Charles D Pettis, Charles E Mullett: Data collection system using telephone lines. International Tel Data Corporation, John E Wagner, December 25, 1979: US04180709 (100 worldwide citation)

A circuit and a computer program for enabling the monitoring of a plurality of switch settings at remote sites by central telephone exchange equipment through regular telephone lines is described. To compensate for slow drift variations in line impedance, the impedance of each line is continually ca ...


2
Thomas M Ingman, John W Beecroft, Charles E Mullett: Bi-directional dc-to-dc power converter. Condor D C Power Supplies, James F Kirk, May 30, 2000: US06069804 (81 worldwide citation)

A multi-output, multi-directional power converter has an input bi-directional switch and at least a first output bi-directional switch, a coupled inductor having an input winding and at least one output winding. The coupled inductor input winding is connected in series with the input voltage source ...


3
Charles E Mullett: Portable transmitter. Integrated Electronics, Edward D O Brian, January 18, 1977: US04004228 (62 worldwide citation)

A portable transmitter intended to be used to broadcast a signal in response to an external actuation can be constructed so as to include a board such as a so-called printed circuit board carrying a metal coil serving as an antenna. This coil surrounds a central region of the board carrying the oper ...


4
Charles E Mullett, Thomas M Ingman: Converter output regulation via channel resistance modulation of synchronous rectifiers. Condor D C Power Supplies, James F Kirk, December 11, 2001: US06330169 (29 worldwide citation)

An output voltage regulation system allows independent output regulation of multi-output dc-dc switched-mode power converters. The channel resistance of MOSFET synchronous output rectifiers are controlled to obtain the voltage drop required to keep the respective output between predetermined limits ...


5
Charles E Mullett: Method of forming a high efficiency power controller. Semiconductor Components, Robert F Hightower, August 30, 2005: US06936997 (13 worldwide citation)

A power controller (10, 70) forms a pass-through zone of output voltages. When the output voltage is between an upper limit and lower limit of the pass-through zone, the power controller (10, 70) continuously connects the input voltage to the output to form the output voltage. When the output voltag ...


6
Thomas M Ingman, Charles E Mullett: Quasi-synchronous, magnetic amplifier regulated dc-dc converter. Condor D C Power Supplies, William L Johnson, August 31, 2004: US06785151 (8 worldwide citation)

A circuit and method provides a regulated dc—dc power conversion. Active switches, saturable core inductors, and a diode are used in a quasi-synchronous circuit. During a part of the cycle (the “blocking interval”) free-wheeling current is routed through free-wheeling diode while a saturable core in ...


7
Charles E Mullett, Jefferson W Hall: Multi-current battery charger circuit and method therefor. Semiconductor Components Industries L L C, Robert F Hightower, November 25, 2008: US07456611 (7 worldwide citation)

In one embodiment, a battery charger is configured to provide a normal charge current during a first time period and to supply a maintenance current after the first time period expires.


8
Charles E Mullett, Thomas M Ingman: Converter output regulation via channel resistance modulation of synchronous rectifiers. James F Kirk, October 11, 2001: US20010028570-A1

An output voltage regulation system allows independent output regulation of multi-output dc-dc switched-mode power converters. The channel resistance of MOSFET synchronous output rectifiers are controlled to obtain the voltage drop required to keep the respective output between predetermined limits ...


9
Charles E Mullett: Method of forming a high efficiency power controller. Semiconductor Components, James J Stipanuk, Semiconductor Components, February 17, 2005: US20050035747-A1

A power controller (10, 70) forms a pass-through zone of output voltages. When the output voltage is between an upper limit and lower limit of the pass-through zone, the power controller (10, 70) continuously connects the input voltage to the output to form the output voltage. When the output voltag ...


10
Charles E Mullett, Jefferson W Hall: Battery charger circuit and method therefor. Semiconductor Components, Semiconductor Components, Bradley J Botsch, February 15, 2007: US20070035278-A1

In one embodiment, a battery charger is configured to provide a normal charge current during a first time period and to supply a maintenance current after the first time period expires.