Patent US3218573A successfully refreshed from Google Patents.
US3218573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunnel diode circuit using transistor to bias the tunnel diode
Assignee: US Philips Corp
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Filing: 1962-07-18
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Granted: 1965-11-16
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Expires: 1982-07-18
Abstract
No abstract record available.
Inventors
- 👤 Theodorus Jozef Van Kessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:56
CPC Classifications
E; E04; E04H; E04H6/00; E04H6/08; E04H6/12; E04H6/30; E04H6/36; H; H03; H03B; H03B7/00; H03B7/02; H03B7/06; H03B7/08; H03D; H03D7/00; H03D7/02; H03D7/04; H03F; H03F1/00; H03F1/08; H03F1/22; H03F3/00; H03F3/04; H03F3/10; H03F3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A CIRCUIT FOR BIASING A TUNNEL DIODE COMPRISING A TUNNEL DIODE, A TRANSISTOR HAVING EMITTER, BASE AND COLLECTOR ELECTRODES, A SUPPLY SOURCE, FIRST AND SECOND RESISTORS CONNECTED SERIALLY TO SAID SOURCE, MEANS CONNECTING THE EMITTER-BASE PATH OF SAID TRANSISTOR AND SAID TUNNEL DIODE WITH THE SAME PAST DIRECTION IN SERIES ACROSS ONE OF SAID RESISTORS, WHEREBY SAID TUNNEL DIODE IS BIASED TO A NEGATIVE SLOPE PART OF ITS CHARACTERISTICS, MEANS FOR PROVIDING OSCILLATIONS ACROSS SAID TUNNEL DIODE, CAPACITOR MEANS IN PARALLEL WITH SAID FIRST RESISTOR AND HAVING A LOW IMPEDANCE WITH RESPECT TO SAID OSCILLATIONS, AND LOAD CIRCUIT MEANS CONNECTED TO SAID COLLECTOR ELECTRODE, WHEREBY SAID OSCILLATIONS ARE AMPLIFIED BY SAID TRANSISTOR.
Claim 2
Dependent Claim
112 words
A CIRCUIT FOR BIASING A TUNNEL DIODE COMPRISING A TUNNEL DIODE, A TRANSISTOR HAVING EMITTER, BASE AND COLLECTOR ELECTRODES, A SUPPLY SOURCE, FIRST AND SECOND RESISTORS CONNECTED SERIALLY TO SAID SOURCE, MEANS CONNECTING THE EMITTER-BASE PATH OF SAID TRANSISTOR AND SAID TUNNEL DIODE WITH THE SAME PAST DIRECTION IN SERIES ACROSS ONE OF SAID RESISTORS, WHEREBY SAID TUNNEL DIODE IS BIASED TO A NEGATIVE SLOPE PART OF ITS CHARACTERISTICS, MEANS FOR PROVIDING OSCILLATIONS ACROSS SAID TUNNEL DIODE, CAPACITOR MEANS IN PARALLEL WITH SAID FIRST RESISTOR AND HAVING A LOW IMPEDANCE WITH RESPECT TO SAID OSCILLATIONS, AND LOAD CIRCUIT MEANS CONNECTED TO SAID COLLECTOR ELECTRODE, WHEREBY SAID OSCILLATIONS ARE AMPLIFIED BY SAID TRANSISTOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |