Hiro Moriyasu
Hiro Moriyasu (b. 1935 in Kure, Hiroshima, Japan – d. 17 July 2005 in Portland, OR) was an engineer who joined Tektronix in June 1956.
He pioneered the digital oscilloscope and other advanced computer technologies, and held more than 20 U.S. patents.
In the early 1970s, Hiro became the general manager of a new division of Tektronix focused on scientific graphic computing.
Upon leaving Tektronix in June 1986, Hiro spent two years at Electro Scientific, Inc., co-founded Zeelan Technology in 1990 (acquired by Mentor in 1996) and founded of Acumar Technology in 1998 (acquired by Lafayette Instruments in 2006).
Moriyasu was born in Kure, Hiroshima, Japan. He came to the United States in 1953 as an electrical engineering student at Oregon State University. He died in Portland, Oregon on 17 July 2005, aged 70.
Links
- Hiro Moriyasu @ vintagetek.org
- Tek inventors recognized at banquet (1984)
- Digital oscilloscope inventor Moriyasu dies (AP, 2005)
- Hiro Moriyasu: Engineering Hall of Fame (2006)
- Barrie Gilbert, The Gears of Genius in IEEE SCCS News (2007)
Products
- Key designer of 4051 computer
- Key designer of P7001 digitizer
- Likely designer of X381 plug-in (history uncertain)
- ... please add
Documents Authored by Hiro Moriyasu
| Document | Page | Class | Title | Author(s) | Year | Refers to |
|---|---|---|---|---|---|---|
| Tekscope 1973 V5 N2 Mar 1973.pdf | 2 | Article | The Oscilloscope with Computing Power | Hiro Moriyasu • Luis Navarro • Jack Gilmore • Bruce Hamilton | 1973 | 7704A • P7001 |
Products by Hiro Moriyasu
| Manufacturer | Model | Description | Designers | Introduced |
|---|---|---|---|---|
| Tektronix | X381 | Experimental timebase plug-in | Hiro Moriyasu | (not released) |
| Tektronix | 321 | Portable single channel scope | Oz Svehaug • Oliver Dalton • Hiro Moriyasu | 1960 |
| Tektronix | Q | Strain gauge preamp plug-in | Hiro Moriyasu | 1960 |
| Tektronix | O | Dual opamp plugin | Hiro Moriyasu | 1962 |
| Tektronix | 321A | Portable single channel scope | Oz Svehaug • Oliver Dalton • Hiro Moriyasu | 1964 |
| Tektronix | P7001 | Digitizer for the 7704A oscilloscope | Hiro Moriyasu • Luis Navarro • Bruce Hamilton • Jack Gilmore • Bob Shand • Bruce Hamilton • Jack Robinson • Bill Lucas • Jack Grimes • Dennis Keldsen • Mohamed Saba • Dick Beatty • Wayne Eshelman • George Rhine • Bill Markwart • Marlow Butler • Carl Dalby • Colin Doward • Gale Byers | 1973 |
| Tektronix | 4051 | Graphics-capable desktop microcomputer | Hiro Moriyasu | 1975 |
Components by Hiro Moriyasu
Patents by Hiro Moriyasu
| Page | Office | Number | Title | Inventors | Company | Filing date | Grant date |
|---|---|---|---|---|---|---|---|
| Patent CA 910988A | CA | 910988A | Transmission line circuit having common delay line for two signal paths of opposite direction | Hiro Moriyasu | Tektronix Inc | 1972-09-26 | |
| Patent CA 907199A | CA | 907199A | Read only memory employing striplines | Hiro Moriyasu | Tektronix Inc | 1972-08-08 | |
| Patent CA 798503A | CA | 798503A | Trigger level control circuit | Hiro Moriyasu | Tektronix Inc | 1968-11-05 | |
| Patent CA 793994A | CA | 793994A | Automatic time base rate circuit | Hiro Moriyasu | Tektronix Inc | 1968-09-03 | |
| Patent US 3325742A | US | 3325742A | Hybrid amplifier circuit | Hiro Moriyasu | Tektronix Inc | 1963-08-06 | 1967-06-13 |
| Patent US 3441863A | US | 3441863A | Drift compensated direct coupled amplifier circuit having adjustable d.c. output voltage level | Hiro Moriyasu | Tektronix Inc | 1965-08-02 | 1965-08-02 |
| Patent US 3439282A | US | 3439282A | Time base generator with automatic rate control | Hiro Moriyasu | Tektronix Inc | 1965-08-20 | 1965-08-20 |
| Patent US 3473044A | US | 3473044A | Monostable comparator circuit | Hiro Moriyasu | Tektronix Inc | 1965-12-13 | 1965-12-13 |
| Patent US 3408580A | US | 3408580A | Oscilloscope device exhibiting reduced jitter | Hiro Moriyasu | Tektronix Inc | 1966-03-17 | 1966-03-17 |
| Patent AU 1028470A | AU | 1028470A | Multistable circuit including elements preset for conduction | Hiro Moriyasu | Tektronix Inc | 1969-01-21 | 1970-01-14 |
| Patent AU 438245 | AU | 438245 | Multistable circuit including elements preset for conduction | Hiro Moriyasu | Tektronix Inc | 1969-01-21 | 1970-01-14 |
| Patent US 3681617A | US | 3681617A | Multistable circuit including elements preset for conduction | Hiro Moriyasu | Tektronix Inc | 1969-01-21 | 1969-01-21 |
| Patent US 3639785A | US | 3639785A | Pulse generator | Hiro Moriyasu | Tektronix Inc | 1969-01-21 | 1969-01-21 |
| Patent US 3596170A | US | 3596170A | Circuit for regulating peak values of an ac wave | Hiro Moriyasu • Hideki Iwata | Tektronix Inc | 1969-09-12 | 1969-09-12 |
| Patent US 3643234A | US | 3643234A | Read-only memory employing striplines | Hiro Moriyasu | Tektronix Inc | 1970-03-02 | 1970-03-02 |
| Patent US 3879669A | US | 3879669A | Adjustable trigger level control circuit | Hiro Moriyasu | Tektronix Inc | 1971-07-21 | 1973-12-10 |
| Patent US 3730993A | US | 3730993A | Transmission line circuit having common delay line for two signal paths of opposite direction | Hiro Moriyasu | Tektronix Inc, Moriyasu H | 1972-01-13 | 1973-05-01 |
| Patent CA 1018684A | CA | 1018684A | Oscilloscope sampling system | Luis Navarro • Wim Velsink • Jack Gilmore • Hiro Moriyasu | Luis Navarro, Wim Velsink, Tektronix, Jack Gilmore, Hiro Moriyasu | 1973-01-08 | 1976-06-04 |
| Patent CA 1032281A | CA | 1032281A | Oscilloscope system for acquiring, processing, and displaying information | Luis Navarro • Hiro Moriyasu • Wim Velsink • Jack Gilmore | Tektronix | 1973-01-08 | 1974-01-07 |
| Patent US 4225940A | US | 4225940A | Oscilloscope system for acquiring, processing, and displaying information | Hiro Moriyasu • Jack Gilmore • Wim Velsink • Luis Navarro | Tektronix Inc | 1978-10-02 | 1978-10-02 |
| Patent US 5034698A | US | 5034698A | Dual-path wideband and precision data acquisition system | Hiro Moriyasu | Hiro Moriyasu | 1990-01-22 | 1990-01-22 |
| Patent US 5243343A | US | 5243343A | Signal acquisition system utilizing ultra-wide time range time base | Hiro Moriyasu | Zeelan Technology, Inc. | 1990-12-03 | 1990-12-03 |
| Patent US 5349539A | US | 5349539A | Behavioral model parameter extractor | Hiro Moriyasu | Zeelan Technology, Inc. | 1991-10-28 | 1991-10-28 |
| Patent US 5444459A | US | 5444459A | Signal acquisition system utilizing ultra-wide time range time base | Hiro Moriyasu | Zeelan Technology, Inc. | 1993-06-22 | 1995-08-22 |
| Patent US 5857986A | US | 5857986A | Interactive vibrator for multimedia | Hiro Moriyasu | Hiro Moriyasu | 1996-05-24 | 1996-05-24 |
| Patent US 5797860A | US | 5797860A | Low profile vibrating floor mat | Hiro Moriyasu | Hiro Moriyasu | 1996-07-26 | 1996-07-26 |
| Patent US 6027463A | US | 6027463A | Music massager | Hiro Moriyasu | Hiro Moriyasu | 1996-12-27 | 1996-12-27 |
| Patent US 6516527 | US | 6516527 | Inclinometer | Hiro Moriyasu | Hiro Moriyasu | 2000-11-03 | 2000-11-03 |
| Patent US 2004143201 | US | 2004143201 | Method of supporting and fastening for effective energy transfer utilizing a vibrating motor for a floor mat application | Hiro Moriyasu | Hiro Moriyasu | 2003-01-17 | 2003-01-17 |
| Patent US 6853103 | US | 6853103 | Low profile push-pull magnetic vibrating apparatus | Hiro Moriyasu | Hiro Moriyasu | 2003-01-31 | 2003-01-31 |