Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7262587 | Circuit and method for controlling DC-DC converter | Hirofumi Dogome, Takashi Matsumoto | 2007-08-28 |
| 7176663 | Control circuit for DC/DC converter | Takashi Matsumoto, Akira Haraguchi | 2007-02-13 |
| 7129682 | DC to DC converter producing output voltage exhibit rise and fall characteristics independent of load thereon | Mitsuo Saeki, Hidetoshi Yano, Hidekiyo Ozawa, Seiya Kitagawa, Toshiyuki Matsuyama +2 more | 2006-10-31 |
| 7098639 | DC-DC converter and method for controlling DC-DC converter | Masahiro Natsume, Hidekiyo Ozawa | 2006-08-29 |
| 7045990 | Portable device having a charging circuit and semiconductor device for use in the charging circuit of the same | Hidekiyo Ozawa | 2006-05-16 |
| 7019501 | DC/DC converter | Hirofumi Dogome, Takashi Matsumoto, Hidekiyo Ozawa, Chikara Tsuchiya | 2006-03-28 |
| 6911806 | DC to DC converter producing output voltage exhibiting rise and fall characteristics independent of load thereon | Mitsuo Saeki, Hidetoshi Yano, Hidekiyo Ozawa, Seiya Kitagawa, Toshiyuki Matsuyama +2 more | 2005-06-28 |
| 6882133 | DC/DC converter control circuits and DC/DC converter systems with power saving mode in accordance with an external control signal | Akira Haraguchi, Takashi Matsumoto | 2005-04-19 |
| 6828764 | Regulator circuit and control method thereof | Yoshihiro Nagaya, Toshiyuki Matsuyama | 2004-12-07 |
| 6724175 | POWER SUPPLY CONTROL DEVICE, POWER SUPPLY CIRCUIT, POWER SUPPLY CONTROL METHOD, AND ELECTRONIC APPARATUS CONTROLLING OUTPUT VOLTAGE THEREOF IN ACCORDANCE WITH A VOLTAGE DETECTED ACROSS AN ON SWITCHING ELEMENT | Kouichi Matsuda, Hidekiyo Ozawa, Kazuhiko Itakura | 2004-04-20 |
| 6696821 | DC-DC converter, duty-ratio setting circuit and electric appliance using them | Akira Haraguchi, Takashi Matsumoto | 2004-02-24 |
| 6674657 | Overvoltage-protective device for power system, AC/DC converter and DC/DC converter constituting the power system | Yoshihiro Nagaya, Toshiyuki Matsuyama | 2004-01-06 |
| 6664772 | DC to DC converter producing output voltage exhibiting rise and fall characteristics independent of load thereon | Mitsuo Saeki, Hidetoshi Yano, Hidekiyo Ozawa, Seiya Kitagawa, Toshiyuki Matsuyama +2 more | 2003-12-16 |
| 6587006 | Oscillator circuit | Jun Kawajiri, Yoshihiro Nagaya | 2003-07-01 |
| 6337563 | DC-DC converter and semicondutor integrated circuit device for DC-DC converter | Toshiyuki Matsuyama, Yoshihiro Nagaya | 2002-01-08 |
| 6194875 | Controller for DC-DC converter | Toshiyuki Matsuyama, Hidekiyo Ozawa, Seiya Kitagawa | 2001-02-27 |
| 6147477 | DC to DC converter producing output voltage exhibiting rise and fall characteristics independent of load thereon | Mitsuo Saeki, Hidetoshi Yano, Hidekiyo Ozawa, Seiya Kitagawa, Toshiyuki Matsuyama +2 more | 2000-11-14 |
| 6025706 | Method for controlling the output voltage of a DC-DC converter | Toshiyuki Matsuyama | 2000-02-15 |
| 5966003 | DC-DC converter control circuit | Takashi Matsumoto, Toshiyuki Matsuyama, Seiya Kitagawa | 1999-10-12 |
| 5850137 | Charging apparatus and current/voltage detector for use therein | Takashi Matsumoto, Yoshiaki Sano | 1998-12-15 |
| 5539302 | Reference power supply | Kazuyoshi Arimura | 1996-07-23 |
| 5218319 | Differential amplifier and active filter using the same | — | 1993-06-08 |