John Kobbe
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John R. Kobbe (? – d. 2013-03-07) joined Tektronix in 1951 to work in the test department.
Having had no formal engineering education, Kobbe co-initiated a "scope class" to design and build an oscilloscope in the test department, during which he designed an un-blanking circuit and a simplified sweep circuit that were eventually used in the 300 series.
Kobbe then joined the Engineering department and later the Advanced Research group.
Products and Inventions
- unblanking and sweep circuits for 310, 315
- 570 curve tracer
- Use of lossy coax cable in scope probes: US Patent 2883619, Electrical Probe. John Kobbe and Bill Polits. Applied 1956.
- US Patent 2,930,986, Distributed Amplifier. John Kobbe and Bill Polits. Applied 1956. (PDF)
- T581 CRT (ref. Staric/Margan paper)
Links
- My Early Tektronix Days by John Kobbe
- Oscilloscope Patents by John Kobbe
- How the Tektronix Series 500 Scopes Came Together by John Kobbe
- Death Notice in May 2013 Tek Retirees newsletter
Products by John Kobbe
| Manufacturer | Model | Description | Designers | Introduced |
|---|---|---|---|---|
| Tektronix | 315 | "Portable" tube scope | Frank Hood • Dick Ropiequet • John Kobbe • Ted Goodfellow • Jim Morrow • Cliff Moulton | 1952 |
| Tektronix | K | 30 MHz amplifier plug-in | John Kobbe | 1955 |
| Tektronix | 570 | Curve tracer for tubes | John Kobbe | 1955 |
| Tektronix | 310 | 4 MHz oscilloscope | Frank Hood • John Kobbe | 1955 |
| Tektronix | 541 | 30 MHz oscilloscope | John Kobbe | 1955 |
| Tektronix | G | 20 MHz differential amplifier | John Kobbe | 1955 |
| Tektronix | 575 | Curve tracer for transistors | John Kobbe • Deane Kidd | 1957 |
| Tektronix | CA | 24 MHz dual-channel amplifier | John Kobbe • Bill Polits | 1959 |
| Tektronix | 310A | 4 MHz oscilloscope | Frank Hood • John Kobbe | 1959 |
Components by John Kobbe
| Model | Class | Description | Designers | Used in |
|---|---|---|---|---|
| 154-0696-00 | CRT | CRT | John Kobbe | 213 |
| T54 | CRT | CRT | John Kobbe | 541 • 545 |
| T581 | CRT | CRT | John Kobbe | 581 • 585 |
| T5810 | CRT | CRT | John Kobbe | 581A • 585A |
Patents by John Kobbe
| Page | Office | Number | Title | Inventors | Company | Filing date | Grant date |
|---|---|---|---|---|---|---|---|
| Patent US 2804571A | US | 2804571A | Unblanking circuit for cathode ray tubes | John Kobbe | Tektronix Inc | 1953-04-20 | 1957-08-27 |
| Patent US 2791642A | US | 2791642A | Phase inversion circuit | John Kobbe | Tektronix Inc | 1953-07-06 | 1957-05-07 |
| Patent US 2853609A | US | 2853609A | Multivibrator hold off circuit | Dick Ropiequet • John Kobbe | Tektronix Inc | 1955-02-21 | 1958-09-23 |
| Patent US 2930986A | US | 2930986A | Distributed amplifier | John Kobbe • Bill Polits | Tektronix Inc | 1956-02-29 | 1960-03-29 |
| Patent US 2883619A | US | 2883619A | Electrical probe | John Kobbe • Bill Polits | Tektronix Inc | 1956-02-29 | 1959-04-21 |
| Patent US 3061788A | US | 3061788A | Multivibrator hold-off circuit | John Kobbe | Tektronix Inc | 1958-09-17 | 1962-10-30 |
| Patent US 3122652A | US | 3122652A | Time base generator | John Kobbe • Oz Svehaug | Tektronix Inc | 1960-12-21 | 1964-02-25 |
| Patent US 3185887A | US | 3185887A | Deflection amplifier compensation linearizer circuit | John Kobbe | Tektronix Inc | 1961-03-20 | 1965-05-25 |
| Patent US 3168679A | US | 3168679A | Intensity control compensation circuit for use in a cathode ray oscilloscope | John Kobbe | Tektronix Inc | 1961-05-08 | 1965-02-02 |
| Patent US 3219801A | US | 3219801A | Pulse counter | John Kobbe • Sam McCutcheon | Tektronix Inc | 1961-08-25 | 1965-11-23 |
| Patent US 3248655A | US | 3248655A | Ratchet memory circuit and sampling system employing such circuit | John Kobbe • Cliff Moulton • John V Rogers • Norm Winningstad | Tektronix Inc | 1962-05-07 | 1966-04-26 |
| Patent US 3168656A | US | 3168656A | Transmission line circuit having termination impedance which includes emitter junction of transistor | John Kobbe | Tektronix Inc | 1962-06-18 | 1965-02-02 |
| Patent US 3247462A | US | 3247462A | Balanced paraphase amplifier including a feed forward path | John Kobbe | Tektronix Inc | 1963-08-19 | 1966-04-19 |
- KOBBE, JOHN R. (M'55), Circuit Design Engr., Tektronix, Inc., Box 831, Portland, Ore.
