William D. Llewellyn
32Patents
11h-index
11Co-inventors
72Inventor score
Filing activity: Jan 3, 1984 → Jul 6, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5579352A | Simplified window de-skewing in a serial data receiver | Electricity | 83 | Expired |
| US5374860A | Multi-tap digital delay line | Electricity | 40 | Expired |
| US5339050A | Frequency synthesizing phase lock loop with unvarying loop parameters | Electricity | 34 | Expired |
| US5172397A | Single channel serial data receiver | Electricity | 31 | Expired |
| US6724248B2 | DC offset self-calibration system for a digital switching amplifier | Electricity | 29 | Expired |
| US9729986B2 | Protection of a speaker using temperature calibration | Electricity | 25 | Active |
| US5329251A | Multiple biasing phase-lock-loops controlling center frequency of phase-lock-loop clock recovery circuit | Physics | 24 | Expired |
| US6127893A | Method and apparatus for controlling an audio signal level | Electricity | 19 | Expired |
| US5912779A | Method of reading and writing data on a magnetic medium | Physics | 16 | Expired |
| US7236117B1 | Apparatus and method for ping-pong mismatch correction | Electricity | 14 | Expired |
| US7026866B2 | DC offset self-calibration system for a switching amplifier | Electricity | 12 | Expired |
| US5463655A | Single-ended pulse gating circuit | Electricity | 9 | Expired |
| US7443905B1 | Apparatus and method for spread spectrum clock generator with accumulator | Electricity | 9 | Expired |
| US5394079A | Current mirror with improved input voltage headroom | Physics | 8 | Expired |
| US6329876A | Noise reduction scheme for operational amplifiers | Electricity | 7 | Expired |
| US6566946B2 | Noise reduction scheme for operational amplifiers | Electricity | 7 | Expired |
| US8866544B2 | Class D pulse width modulator with dual feedback | Electricity | 6 | Active |
| US4546307A | NPN Transistor current mirror circuit | Electricity | 6 | Expired |
| US5426539A | Multiple gap read/write head for data storage devices | Physics | 5 | Expired |
| US7515310B2 | Programmable gain amplifier with hybrid digital/analog architecture | Electricity | 5 | Active |
| US5572505A | Spring starter for a hard disk drive platter assembly | Physics | 5 | Expired |
| US5644457A | Multiple gap read/write head for data storage devices | Physics | 5 | Expired |
| US5287054A | Attenuating voltage follower circuit | Electricity | 3 | Expired |
| US5361068A | Low-current digital-to-analog converter | Electricity | 3 | Expired |
| US6785392B1 | Methods and apparatus for enabling or disabling an amplifier | Electricity | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.