Unitrode Corporation
72Patents
0Active
72Granted
41Portfolio score
Filing activity: Aug 20, 1974 → Jul 26, 1999
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5652501A | Voltage sensor for detecting cell voltages | Emerging Cross-Sectional Technologies | 233 | Expired |
| US5627460A | DC/DC converter having a bootstrapped high side driver | Emerging Cross-Sectional Technologies | 198 | Expired |
| US5581170A | Battery protector | Electricity | 120 | Expired |
| US5663878A | Apparatus and method for generating a low frequency AC signal | Electricity | 104 | Expired |
| US4716514A | Synchronous power rectifier | Emerging Cross-Sectional Technologies | 82 | Expired |
| US5929577A | Brushless DC motor controller | Electricity | 77 | Expired |
| US5157269A | Load current sharing circuit | Physics | 74 | Expired |
| US6114835A | Multi-cell battery pack charge balancing circuit | Electricity | 70 | Expired |
| US5422562A | Switching regulator with improved Dynamic response | Electricity | 69 | Expired |
| US5767664A | Bandgap voltage reference based temperature compensation circuit | Emerging Cross-Sectional Technologies | 68 | Expired |
| US5206540A | Transformer isolated drive circuit | Electricity | 60 | Expired |
| US6344959B1 | Method for sensing the output voltage of a charge pump circuit without applying a load to the output stage | Electricity | 59 | Expired |
| US5359276A | Automatic gain selection for high power factor | Emerging Cross-Sectional Technologies | 56 | Expired |
| US5585741A | Impedance emulator | Physics | 47 | Expired |
| US5751139A | Multiplexing power converter | Emerging Cross-Sectional Technologies | 44 | Expired |
| US5504416A | Battery charger circuit including battery temperature control | Emerging Cross-Sectional Technologies | 39 | Expired |
| US5004705A | Inverted epitaxial process | Emerging Cross-Sectional Technologies | 37 | Expired |
| US5361041A | Push-pull amplifier | Electricity | 36 | Expired |
| US5098861A | Method of processing a semiconductor substrate including silicide bonding | Emerging Cross-Sectional Technologies | 34 | Expired |
| US5416354A | Inverted epitaxial process semiconductor devices | Electricity | 33 | Expired |
| US5710697A | Power supply controller having frequency foldback and volt-second duty cycle clamp features | Electricity | 31 | Expired |
| US6144245A | Adaptive leading edge blanking circuit to eliminate spike on power switching transistor current sense signal | Electricity | 28 | Expired |
| US5338979A | Controllable bus terminator | Emerging Cross-Sectional Technologies | 28 | Expired |
| US5691889A | Controller having feed-forward and synchronization features | Electricity | 28 | Expired |
| US5291384A | Phase shifted switching controller | Emerging Cross-Sectional Technologies | 27 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.