Lambda Electronics
21Patents
0Active
21Granted
32Portfolio score
Filing activity: Apr 19, 1989 → Apr 12, 2002
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5291382A | Pulse width modulated DC/DC converter with reduced ripple current coponent stress and zero voltage switching capability | Electricity | 145 | Expired |
| US6961253B1 | Drive circuits for synchronous rectifiers | Emerging Cross-Sectional Technologies | 45 | Expired |
| US5339217A | Composite printed circuit board and manufacturing method thereof | Emerging Cross-Sectional Technologies | 33 | Expired |
| US5465201A | Overload protection of switch mode converters | Electricity | 21 | Expired |
| US5021937A | Maximum duty cycle limiting of pulse width modulators | Electricity | 18 | Expired |
| US6442047B1 | Power conversion apparatus and methods with reduced current and voltage switching | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5438505A | Adaptive control method for power converters | Physics | 12 | Expired |
| US5430405A | Control circuit for converters operating in the discontinuous mode | Electricity | 11 | Expired |
| US4985821A | Indirect current sensing of DC to DC converters | Electricity | 9 | Expired |
| US6606259B2 | Clamped-inductance power converter apparatus with transient current limiting capability and operating methods therefor | Emerging Cross-Sectional Technologies | 8 | Expired |
| US6744647B2 | Parallel connected converters apparatus and methods using switching cycle with energy holding state | Electricity | 8 | Expired |
| US5394025A | Stabilization of MOS-FET type voltage to current converters | Physics | 7 | Expired |
| US5289166A | Voltage detector | Physics | 6 | Expired |
| US5014182A | High frequency self-oscillating inverter with negligible switching losses | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6005779A | Rectification and inversion circuits | Electricity | 5 | Expired |
| US6703817B2 | Pulse width modulated power conversion apparatus and methods using capacitor-charge feedback | Electricity | 4 | Expired |
| US6201706A | "Power supply device with externally disconnectable ""Y"" capacitors" | Electricity | 4 | Expired |
| US5920461A | Surface mount power supply device | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5894216A | Solid-state saturable reactor emulator | Physics | 4 | Expired |
| US6008997A | Series resonant converter with inherent short circuit protection | Emerging Cross-Sectional Technologies | 1 | Expired |
| US6289580A | Surface mount power supply device | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.