Supertex, Inc.
🏢 View company profile →78Patents
44Active
78Granted
50Portfolio score
Filing activity: Apr 15, 1977 → Oct 9, 2013 · 30 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4345265A | MOS Power transistor with improved high-voltage capability | Electricity | 157 | Expired |
| US6958920B2 | Switching power converter and method of controlling output voltage thereof using predictive sensing of magnetic flux | Electricity | 151 | Expired |
| US4344081A | Combined DMOS and a vertical bipolar transistor device and fabrication method therefor | Electricity | 130 | Expired |
| US6940733B2 | Optimal control of wide conversion ratio switching converters | Emerging Cross-Sectional Technologies | 121 | Expired |
| US6781351B2 | AC/DC cascaded power converters having high DC conversion ratio and improved AC line harmonics | Emerging Cross-Sectional Technologies | 96 | Expired |
| US6169391A | Device for converting high voltage alternating current to low voltage direct current | Electricity | 83 | Expired |
| US4145703A | High power MOS device and fabrication method therefor | Electricity | 82 | Expired |
| US7561452B2 | Transformer-isolated flyback converters and methods for regulating output current thereof | Electricity | 50 | Active |
| US8147409B2 | Method and apparatus for transducer excitation in medical ultrasound imaging | Physics | 45 | Active |
| US6304461A | DC power converter having bipolar output and bi-directional reactive current transfer | Electricity | 45 | Expired |
| US4402003A | Composite MOS/bipolar power device | Electricity | 40 | Expired |
| US7723926B2 | Shunting type PWM dimming circuit for individually controlling brightness of series connected LEDS operated at constant current and method therefor | Electricity | 34 | Active |
| US8106597B2 | High efficiency boost LED driver with output | Electricity | 31 | Active |
| US5815383A | High voltage start-up circuit and method therefor | Electricity | 30 | Expired |
| US8686651B2 | Multiple stage sequential current regulator | Emerging Cross-Sectional Technologies | 30 | Active |
| US7498754B2 | Architecture for driving multiple loads at constant current | Emerging Cross-Sectional Technologies | 30 | Active |
| US4398339A | Fabrication method for high power MOS device | Electricity | 28 | Expired |
| US4393391A | Power MOS transistor with a plurality of longitudinal grooves to increase channel conducting area | Electricity | 27 | Expired |
| US6525515B1 | Feedback apparatus and method for adaptively controlling power supplied to a hot-pluggable subsystem | Physics | 25 | Expired |
| US8013640B1 | Programmable ultrasound transmit beamformer integrated circuit and method | Physics | 23 | Active |
| US7513873B2 | Low-noise ultrasound method and beamformer system for doppler processing | Physics | 20 | Active |
| US6917504B2 | Apparatus and method for adaptively controlling power supplied to a hot-pluggable subsystem | Physics | 20 | Expired |
| US6667583B2 | Method and apparatus for efficiently driving a low-voltage device from a wide-range input supply | Electricity | 20 | Expired |
| US5171705A | Self-aligned structure and process for DMOS transistor | Emerging Cross-Sectional Technologies | 19 | Expired |
| US7564263B2 | High-speed logic signal level shifter | Electricity | 18 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.