Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7834672 | Low power charge pump | Vincent Tso, James Ho | 2010-11-16 |
| 7132835 | PLL with built-in filter-capacitor leakage-tester with current pump and comparator | — | 2006-11-07 |
| 6801080 | CMOS differential input buffer with source-follower input clamps | — | 2004-10-05 |
| 6426662 | Twisted-ring oscillator and delay line generating multiple phases using differential dividers and comparators to match delays | — | 2002-07-30 |
| 6320438 | Duty-cycle correction driver with dual-filter feedback loop | — | 2001-11-20 |
| 6124741 | Accurate PLL charge pump with matched up/down currents from Vds-compensated common-gate switches | — | 2000-09-26 |
| 5523723 | Low noise low voltage phase lock loop | Bharat Bhushan, Paul Ta | 1996-06-04 |
| 5515012 | Very low noise, wide frequency range phase lock loop | Bharat Bhushan, Paul Ta | 1996-05-07 |
| 4912619 | Circuit for limiting inrush current during initial turn-on of a clock-derived power supply | — | 1990-03-27 |
| 4890013 | Circuit for sensing voltages beyond the supply voltage of the sensing circuit | — | 1989-12-26 |
| 4876517 | Circuit for sensing FET or IGBT drain current over a wide dynamic range | — | 1989-10-24 |