Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6900752 | Stepwise zero-data-detection mute circuit | Toshikazu Oda, Hiroyuki Eguchi | 2005-05-31 |
| 6366228 | Selecting circuit, digital/analog converter and analog/digital converter | — | 2002-04-02 |
| 6236349 | Analog-digital converter analog-digital converting method and volume controller system | — | 2001-05-22 |
| 6204789 | Variable resistor circuit and a digital-to-analog converter | — | 2001-03-20 |
| 6114981 | D/A converter | — | 2000-09-05 |
| 5841308 | Amplifier for cancelling noise between circuit systems | — | 1998-11-24 |
| 5789980 | Amplifier and semiconductor device which are operated at a low voltage | Mariko Terada | 1998-08-04 |
| 5610606 | 1-bit D/A conversion circuit | Toshitaka FUKUNAGA | 1997-03-11 |
| 5345233 | Digital .SIGMA.-.DELTA. modulator | Koichiro Sato, Tsunetaka Matsuo | 1994-09-06 |
| 5225835 | Sigma delta type digital/analog converter system | Shin-ichi Majima | 1993-07-06 |
| 5202685 | Digital sigma-delta modulator having a limiter circuit | — | 1993-04-13 |
| 4733162 | Thermal shutoff circuit | Hiroyuki Haga, Hiromi Kusakabe | 1988-03-22 |
| 4580100 | Phase locked loop clock recovery circuit for data reproducing apparatus | Hiroshi Suzuki, Tadashi Kojima | 1986-04-01 |
| 4379268 | Differential amplifier circuit | — | 1983-04-05 |
| 4271075 | Process for producing 3,3-bis-(4-dimethylaminophenyl)-6-dimethylaminophthalide | Kazuyuki Wakasugi | 1981-06-02 |