Alexander Wayne Hietala
118Patents
22h-index
58Co-inventors
93Inventor score
Filing activity: Feb 18, 1982 → Jan 13, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US9711999B2 | Antenna array calibration for wireless charging | Electricity | 188 | Active |
| US5430416A | Power amplifier having nested amplitude modulation controller and phase modulation controller | Electricity | 163 | Expired |
| US5055802A | Multiaccumulator sigma-delta fractional-N synthesis | Electricity | 103 | Expired |
| US5278994A | Power amplifier saturation detection and correction method and apparatus | Electricity | 92 | Expired |
| US5424689A | Filtering device for use in a phase locked loop controller | Electricity | 79 | Expired |
| US5111162A | Digital frequency synthesizer having AFC and modulation applied to frequency divider | Electricity | 61 | Expired |
| US8774065B2 | Radio front end and power management architecture for LTE-advanced | Electricity | 56 | Active |
| US6834084B2 | Direct digital polar modulator | Electricity | 54 | Expired |
| US5150075A | Power amplifier ramp up method and apparatus | Electricity | 53 | Expired |
| US5055800A | Fractional N/M synthesis | Electricity | 48 | Expired |
| US9019011B2 | Method of power amplifier calibration for an envelope tracking system | Electricity | 47 | Active |
| US6816718B2 | DC offset correction using dummy amplifier | Electricity | 40 | Expired |
| US5093632A | Latched accumulator fractional N synthesis with residual error reduction | Electricity | 35 | Expired |
| US5495206A | Fractional N frequency synthesis with residual error correction and method thereof | Electricity | 34 | Expired |
| US5070310A | Multiple latched accumulator fractional N synthesis | Electricity | 34 | Expired |
| US5166642A | Multiple accumulator fractional N synthesis with series recombination | Electricity | 28 | Expired |
| US9515621B2 | Multimode RF amplifier system | Electricity | 28 | Active |
| US9519612B2 | Serial bus buffer with noise reduction | Emerging Cross-Sectional Technologies | 26 | Active |
| US6571091B1 | Power control method and apparatus suitable for use in a radio communication device | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5867063A | Gain distribution circuit | Electricity | 24 | Expired |
| US5448770A | Temperature-coefficient controlled radio frequency signal detecting circuitry | Electricity | 23 | Expired |
| US5140286A | Oscillator with bias and buffer circuits formed in a die mounted with distributed elements on ceramic substrate | Electricity | 22 | Expired |
| US6480555B1 | Method and apparatus for extended range frequency correction burst detection | Electricity | 21 | Expired |
| US7962108B1 | Adaptive AM/PM compensation | Electricity | 20 | Active |
| US8200181B1 | Noise reduction in a dual radio frequency receiver | Electricity | 19 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.