Michael Herfurth
28Patents
9h-index
24Co-inventors
75Inventor score
Filing activity: Sep 22, 1989 → Apr 27, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5049790A | Method and apparatus for operating at least one gas discharge lamp | Emerging Cross-Sectional Technologies | 67 | Expired |
| US7746671B2 | Control circuit for a switch unit of a clocked power supply circuit, and resonance converter | Emerging Cross-Sectional Technologies | 56 | Active |
| US7397678B2 | Method for driving a switch that controls current drawn in a power factor correction circuit and a drive circuit therefor | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5982642A | Pulsed power supply of switched-mode power supplies | Emerging Cross-Sectional Technologies | 16 | Expired |
| US6806694B2 | Switching regulator with dynamic current limiting and drive circuit for the switching regulator | Emerging Cross-Sectional Technologies | 14 | Expired |
| US7135845B2 | Drive circuit for a switch in a switching converter and method for driving a switch in a switching converter | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5594323A | Control process for a voltage transformer with a wide input voltage range and the application of such a process | Emerging Cross-Sectional Technologies | 13 | Expired |
| US9991791B2 | System and method for a switched-mode power supply | Emerging Cross-Sectional Technologies | 10 | Active |
| US7969754B2 | Control circuit for a switch unit of a clocked power supply circuit, and resonance converter | Emerging Cross-Sectional Technologies | 10 | Active |
| US5386187A | Method for anticipatory control of a switched-mode power supply for compensating for fluctuations in feed voltage and circuit configuration for performing the method | Electricity | 9 | Expired |
| US7378807B2 | Drive circuit for a fluorescent lamp with a diagnosis circuit, and method for diagnosis of a fluorescent lamp | Electricity | 8 | Expired |
| US9763289B2 | System and method for a switched-mode power supply | Emerging Cross-Sectional Technologies | 6 | Active |
| US7683595B2 | Method for actuation, and actuating circuit for a switch in a power factor correction circuit | Emerging Cross-Sectional Technologies | 6 | Active |
| US9602018B2 | Power converter with reduced power consumption in standby mode | Emerging Cross-Sectional Technologies | 4 | Active |
| US9699848B2 | System and method for a switched-mode power supply | Emerging Cross-Sectional Technologies | 4 | Active |
| US5596264A | Circuit configuration for limiting the output voltage of a clocked voltage regulator | Emerging Cross-Sectional Technologies | 4 | Expired |
| US7560873B2 | Method for detection of non-zero-voltage switching operation of a ballast of fluorescent lamps, and ballast | Electricity | 4 | Expired |
| US7812612B2 | Method and apparatus for monitoring the operation of a gas discharge lamp | Electricity | 3 | Active |
| US9537386B2 | Driver controller with internally calculated average output current | Emerging Cross-Sectional Technologies | 3 | Active |
| US6995467B2 | Semiconductor component | Electricity | 2 | Expired |
| US8022637B2 | Method for detection of non-zero-voltage switching operation of a ballast of fluorescent lamps, and ballast | Electricity | 2 | Active |
| US8525429B2 | Method for controlling gas discharge lamps | Electricity | 2 | Active |
| US7834552B2 | Controlling a lamp ballast | Electricity | 1 | Active |
| US9590507B1 | Auxiliary supply for a switched-mode power supply controller using bang-bang regulation | Electricity | 1 | Active |
| US8378590B2 | Method for detection of non-zero-voltage switching operation of a ballast of fluorescent lamps, and ballast | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.