Patents Assigned to Polarity, Inc.
-
Patent number: 8283896Abstract: An energy storage device includes buck and boost switches that charge and discharge a charge storage element (e.g. a supercapacitor or ultracapacitor) over a broad voltage range. Integrated charge limiting prevents the storage element from sinking a potentially damaging level of current. Pulse-width modulated control signals are combined with higher-frequency signals to allow the resulting modulated control signals to pass through relatively small, inexpensive isolation transformers. Pairs of control signals may be combined to produce composite control signals that turn power switches on and off, or may be used to separately turn the power switches on and off.Type: GrantFiled: May 28, 2010Date of Patent: October 9, 2012Assignee: Polarity, Inc.Inventors: Daniel Goluszek, Lawrence W. Goins
-
Patent number: 8208275Abstract: A high-power modulation system includes drive circuitry that receives input signals from the signal source via a series of transformers. The drive circuitry amplifies the input signals and provides the resulting amplified signals to the high-power switch. The switch includes a series of stacked switching elements, each with a control terminal, first and second current-handling terminals, and feedback path extending between the first current-handling terminal and the control terminal. The feedback paths work in concert to turn the switches on and off together to prevent excessive voltage from developing across one or a subset of the switching elements. The feedback path includes a resistor that dampens the bandwidth of the feedback path to reduce turn-off and turn-on ringing and oscillation. The damping resistor may be coupled in series with a diode that holds charge against the control terminal of the switching element.Type: GrantFiled: February 5, 2010Date of Patent: June 26, 2012Assignee: Polarity, Inc.Inventors: Lawrence W. Goins, Daniel Goluszek
-
Publication number: 20100135047Abstract: A high-power modulation system includes drive circuitry that receives input signals from the signal source via a series of transformers. The drive circuitry amplifies the input signals and provides the resulting amplified signals to the high-power switch. The switch includes a series of stacked switching elements, each with a control terminal, first and second current-handling terminals, and feedback path extending between the first current-handling terminal and the control terminal. The feedback paths work in concert to turn the switches on and off together to prevent excessive voltage from developing across one or a subset of the switching elements. The feedback path includes a resistor that dampens the bandwidth of the feedback path to reduce turn-off and turn-on ringing and oscillation. The damping resistor may be coupled in series with a diode that holds charge against the control terminal of the switching element.Type: ApplicationFiled: February 5, 2010Publication date: June 3, 2010Applicant: Polarity, Inc.Inventors: Lawrence W. Goins, Daniel Goluszek
-
Publication number: 20100127811Abstract: A transformer housing encompasses a core and both primary and secondary windings. The primary or secondary windings can be incorporated into the housing, and the housing itself can provide a center tap for the transformer.Type: ApplicationFiled: November 21, 2008Publication date: May 27, 2010Applicant: Polarity Inc.Inventors: Daniel Goluszek, Lawrence W. Goins
-
Publication number: 20100090788Abstract: A transformer housing encompasses a core and both primary and secondary windings. The primary or secondary windings can be incorporated into the housing, and the housing itself can provide a center tap for the transformer.Type: ApplicationFiled: February 4, 2008Publication date: April 15, 2010Applicant: POLARITY INC.Inventors: Daniel Goluszek, Lawrence W. Goins
-
Patent number: 7660137Abstract: A high-power modulation system includes drive circuitry that receives input signals from the signal source via a series of transformers. The drive circuitry amplifies the input signals and provides the resulting amplified signals to the high-power switch. The switch includes a series of stacked switching elements, each with a control terminal, first and second current-handling terminals, and feedback path extending between the first current-handling terminal and the control terminal. The feedback paths work in concert to turn the switches on and off together to prevent excessive voltage from developing across one or a subset of the switching elements. The feedback path includes a resistor that dampens the bandwidth of the feedback path to reduce turn-off and turn-on ringing and oscillation. The damping resistor may be coupled in series with a diode that holds charge against the control terminal of the switching element.Type: GrantFiled: July 26, 2006Date of Patent: February 9, 2010Assignee: Polarity, Inc.Inventors: Lawrence W. Goins, Daniel Goluszek
-
Patent number: 6246598Abstract: A high-power modulation system includes drive circuitry that receives input signals from the signal source via a series of transformers. The drive circuitry amplifies the input signals and provides the resulting amplified signals to the high-power switch. A storage capacitor within the drive circuitry stores energy derived from the input signals, and the stored energy is used to power the drive circuitry. One embodiment takes advantage of inductive ringing to more rapidly turn off the high-power switch. A diode connected in series between two drive transistors rectifies the ringing signals, pulling a control signal to the high-power switch negative.Type: GrantFiled: August 2, 2000Date of Patent: June 12, 2001Assignee: Polarity, Inc.Inventors: Ralph E. Tarter, Lawrence W. Goins