Patents by Inventor Mark R. Muegge
Mark R. Muegge has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7974109Abstract: A system and a method that uses primary side sensing to regulate the output voltage at a cable end without any remote sensing of cable connections back from the load. This is accomplished by approximating the current from the control voltage in the control loop through the relationship that defines the Ton time in terms of the control voltage Vc. Once the approximation of the output current is known, it is multiplied by a known fixed cable resistance, and this value is subtracted from the feedback sensor output before it is subtracted from the digital reference. This forces the regulator to raise the output voltage by the amount of drop across the cable, causing the output of the cable to be maintained at the targeted regulation point.Type: GrantFiled: May 7, 2007Date of Patent: July 5, 2011Assignee: iWatt Inc.Inventors: John W. Kesterson, Mark R. Muegge, Mark D. Eason
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Patent number: 7936132Abstract: An LED lamp is provided in which the output light intensity of the LEDs in the LED lamp is adjusted based on the input voltage to the LED lamp. The LED lamp comprises one or more LEDs, and an LED driver configured to receive an input voltage and provide regulated current to said one or more LEDs, where the LED driver is configured to adjust the regulated current to said one or more LEDs according to the input voltage to adjust the output light intensity of said one or more LEDs. The LED lamp can be a direct replacement of conventional incandescent lamps in typical wiring configurations found in residential and commercial building lighting applications that use conventional dimmer switches that carry out dimming by changing the input voltage to the LED lamp.Type: GrantFiled: July 16, 2008Date of Patent: May 3, 2011Assignee: iWatt Inc.Inventors: Eng Hwee Quek, Mark R. Muegge, Gordon Chen
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Publication number: 20100013409Abstract: An LED lamp is provided in which the output light intensity of the LEDs in the LED lamp is adjusted based on the input voltage to the LED lamp. The LED lamp comprises one or more LEDs, and an LED driver configured to receive an input voltage and provide regulated current to said one or more LEDs, where the LED driver is configured to adjust the regulated current to said one or more LEDs according to the input voltage to adjust the output light intensity of said one or more LEDs. The LED lamp can be a direct replacement of conventional incandescent lamps in typical wiring configurations found in residential and commercial building lighting applications that use conventional dimmer switches that carry out dimming by changing the input voltage to the LED lamp.Type: ApplicationFiled: July 16, 2008Publication date: January 21, 2010Applicant: iWATT INC.Inventors: Eng Hwee Quek, Mark R. Muegge, Gordon Chen
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Publication number: 20080278132Abstract: The present invention is a system and a method that uses primary side sensing to regulate the output voltage at a cable end without any remote sensing of cable connections back from the load. This is accomplished by approximating the current from the control voltage in the control loop through the relationship that defines the Ton time in terms of the control voltage Vc. Once the approximation of the output current is known, it is multiplied by a known fixed cable resistance, and this value is subtracted from the feedback sensor output before it is subtracted from the digital reference. This forces the regulator to raise the output voltage by the amount of drop across the cable, causing the output of the cable to be maintained at the targeted regulation point.Type: ApplicationFiled: May 7, 2007Publication date: November 13, 2008Inventors: John W. Kesterson, Mark R. Muegge, Mark D. Eason
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Patent number: 6956750Abstract: A power converter comprises an event detection module detecting various events of the power converter in real time at the switching frequency of a switch in the power converter according to predetermined criteria. A pulse generator generates control signals for controlling the on-times and off-times of the switch based on the various detected events. The events detected by the event detection module include a detection of a “knee” in the reflected secondary voltage on the auxiliary windings of the transformer in a primary side sensing flyback power converter, and detection of a digital error quantifying the difference between the reference voltage and the reflected secondary voltage on the auxiliary windings of the transformer in time domain.Type: GrantFiled: December 12, 2003Date of Patent: October 18, 2005Assignee: iWatt Inc.Inventors: Mark D. Eason, Harry Rodriguez, Mark R. Muegge
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Patent number: 6900995Abstract: A method of regulating voltage at an output of a switching power converter includes sensing an output voltage feedback signal; comparing the sensed feedback signal to a reference at a determined time during a cycling of the switch; and regulating the output voltage by either enabling or inhibiting cycling of a switch by a cycle of a drive signal produced by pulse generation circuitry in response to an output of the comparison.Type: GrantFiled: November 27, 2002Date of Patent: May 31, 2005Assignee: iWatt, Inc.Inventors: Mark R. Muegge, Mark Eason, Mark D. Telefus
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Patent number: 6894911Abstract: A method of regulating voltage at an output of a switching power converter, the converter comprising a switch and pulse generation circuitry, the pulse generation circuitry producing one or more drive signals for cycling the switch ON and OFF, wherein if the switch is cycled ON and OFF according to a cycle of a drive signal, power is transferred from a source to a load. The method includes sensing an output voltage feedback signal, comparing the sensed feedback signal to a reference at a determined time during a cycling of the switch, and regulating an output voltage at the load by controlling whether a cycle of one of the drive signals cycles the switch in response to the comparison.Type: GrantFiled: November 27, 2002Date of Patent: May 17, 2005Assignee: iWatt, Inc.Inventors: Mark D. Telefus, Mark R. Muegge, Charles R. Geber, Dickson T. Wong
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Patent number: 6882552Abstract: A power converter for delivering power from a source to a load includes a switch, pulse generation circuitry producing one or more drive signals for cycling the switch ON and OFF, wherein if the switch is cycled ON and OFF according to a cycle of a drive signal, power is transferred from the source to the load, a comparator for comparing a feedback signal approximating an output voltage at the load to a reference, and a controller coupled to the pulse generation circuitry for controlling which, if any, cycle of a drive signal cycles the switch in response to an output of the comparator.Type: GrantFiled: November 27, 2002Date of Patent: April 19, 2005Assignee: iWatt, Inc.Inventors: Mark D. Telefus, Mark R. Muegge, Charles R. Geber, Dickson T. Wong
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Patent number: 6862198Abstract: Switching power converters for regulating voltage at an output of a load include digital control circuitry for sensing an output voltage feedback signal, comparing the sensed feedback signal to a reference at a determined time during a cycling of the switch; and regulating the output voltage by either enabling or inhibiting cycling of a switch by a cycle of a drive signal produced by pulse generation circuitry in response to the comparison.Type: GrantFiled: November 27, 2002Date of Patent: March 1, 2005Assignee: iWatt, Inc.Inventors: Mark R. Muegge, Mark Eason, Mark D. Telefus
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Publication number: 20040052095Abstract: A method of regulating voltage at an output of a switching power converter includes sensing an output voltage feedback signal; comparing the sensed feedback signal to a reference at a determined time during a cycling of the switch; and regulating the output voltage by either enabling or inhibiting cycling of a switch by a cycle of a drive signal produced by pulse generation circuitry in response to an output of the comparison.Type: ApplicationFiled: November 27, 2002Publication date: March 18, 2004Applicant: IWATT, INCInventors: Mark R. Muegge, Mark Eason, Mark D. Telefus
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Publication number: 20040037094Abstract: Switching power converters for regulating voltage at an output of a load include digital control circuitry for sensing an output voltage feedback signal, comparing the sensed feedback signal to a reference at a determined time during a cycling of the switch; and regulating the output voltage by either enabling or inhibiting cycling of a switch by a cycle of a drive signal produced by pulse generation circuitry in response to the comparison.Type: ApplicationFiled: November 27, 2002Publication date: February 26, 2004Applicant: IWATT, INCInventors: Mark R. Muegge, Mark Eason, Mark D. Telefus
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Publication number: 20030132739Abstract: A power converter for delivering power from a source to a load includes a switch, pulse generation circuitry producing one or more drive signals for cycling the switch ON and OFF, wherein if the switch is cycled ON and OFF according to a cycle of a drive signal, power is transferred from the source to the load, a comparator for comparing a feedback signal approximating an output voltage at the load to a reference, and a controller coupled to the pulse generation circuitry for controlling which, if any, cycle of a drive signal cycles the switch in response to an output of the comparator.Type: ApplicationFiled: November 27, 2002Publication date: July 17, 2003Applicant: IWATT, INCInventors: Mark D. Telefus, Mark R. Muegge, Charles R. Geber, Dickson T. Wong
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Publication number: 20030128018Abstract: A method of regulating voltage at an output of a switching power converter, the converter comprising a switch and pulse generation circuitry, the pulse generation circuitry producing one or more drive signals for cycling the switch ON and OFF, wherein if the switch is cycled ON and OFF according to a cycle of a drive signal, power is transferred from a source to a load. The method includes sensing an output voltage feedback signal, comparing the sensed feedback signal to a reference at a determined time during a cycling of the switch, and regulating an output voltage at the load by controlling whether a cycle of one of the drive signals cycles the switch in response to the comparison.Type: ApplicationFiled: November 27, 2002Publication date: July 10, 2003Applicant: IWATT, INCInventors: Mark D. Telefus, Mark R. Muegge, Charles R. Geber, Dickson T. Wong
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Patent number: 6385059Abstract: Control circuitry for controlling the delivery of power from a source voltage to a load in a transformer coupled power converter. The control circuitry includes a power switch having an input coupled to the source, an output, and an activation gate, the power switch, when cycled ON and OFF, defining a pulses of power at the load. A pulse generator is coupled to the power switch, the pulse generator producing a train of constant frequency, constant ON time switching pulses for driving the power switch activation gate. A pulse rate controller responsive to an error signal is coupled between the pulse generator and the power switch, the pulse rate controller regulating an output voltage at the load by controlling the rate of switching pulses delivered to the power switch activation gate over time. The error signal is derived by estimating the output voltage at each switching cycle from the primary side current, while compensating for the expected loss between the source and the load for each power switch cycle.Type: GrantFiled: November 14, 2000Date of Patent: May 7, 2002Assignee: Iwatt, Inc.Inventors: Mark D. Telefus, Mark R. Muegge