US3153759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring the high frequency current amplification factor of transistor
Assignee: Individual
•
Filing: 1962-08-22
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Granted: 1964-10-20
•
Expires: 1982-08-22
Abstract
No abstract record available.
Inventors
- 👤 Yagyu Susumu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:28
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/26; G01R31/2607; G01R31/2608; G01R31/2614
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
APPARATUS FOR MEASURING HIGH FREQUENCY CHARACTERISTIC VALUES OF TRANSISTORS COMPRISING AN OSCILLATOR CIRCUIT WITH ONE TERMINAL CONNECTED TO THE GROUND AND THE OTHER TERMINAL CONNECTED TO THE BASE ELECTRODE OF A TRANSISTOR TO BE MEASURED VIA A BASE CONDENSER AND A BASE RESISTOR, SAID BASE ELECTRODE BEING GROUNDED THROUGH A BASE INDUCTANCE, AN EMITTER CIRCUIT WHICH IS GROUNDED THROUGH A RESISTOR AND A BIAS SOURCE OF PULSATING CURRENT, SAID EMITTER CIRCUIT BEING ALSO GROUNDED THROUGH AN EMITTER CONDENSER, COLLECTOR CIRCUIT MEANS CONNECTED TO THE COLLECTOR ELECTRODE OF SAID TRANSISTOR, OBSERVATION CIRCUIT MEANS COMPRISING A CATHODE RAY OSCILLOSCOPE, MEANS CONNECTING SAID COLLECTOR CIRCUIT MEANS TO ONE SET OF DEFLECTION ELECTRODES OF SAID OSCILLOSCOPE AND MEANS FOR APPLYING THE POTENTIAL OF SAID BIAS SOURCE TO THE OTHER SET OF DEFLECTION ELECTRODES OF SAID OSCILLOSCOPE.
Claim 2
Dependent Claim
132 words
APPARATUS FOR MEASURING HIGH FREQUENCY CHARACTERISTIC VALUES OF TRANSISTORS COMPRISING AN OSCILLATOR CIRCUIT WITH ONE TERMINAL CONNECTED TO THE GROUND AND THE OTHER TERMINAL CONNECTED TO THE BASE ELECTRODE OF A TRANSISTOR TO BE MEASURED VIA A BASE CONDENSER AND A BASE RESISTOR, SAID BASE ELECTRODE BEING GROUNDED THROUGH A BASE INDUCTANCE, AN EMITTER CIRCUIT WHICH IS GROUNDED THROUGH A RESISTOR AND A BIAS SOURCE OF PULSATING CURRENT, SAID EMITTER CIRCUIT BEING ALSO GROUNDED THROUGH AN EMITTER CONDENSER, COLLECTOR CIRCUIT MEANS CONNECTED TO THE COLLECTOR ELECTRODE OF SAID TRANSISTOR, OBSERVATION CIRCUIT MEANS COMPRISING A CATHODE RAY OSCILLOSCOPE, MEANS CONNECTING SAID COLLECTOR CIRCUIT MEANS TO ONE SET OF DEFLECTION ELECTRODES OF SAID OSCILLOSCOPE AND MEANS FOR APPLYING THE POTENTIAL OF SAID BIAS SOURCE TO THE OTHER SET OF DEFLECTION ELECTRODES OF SAID OSCILLOSCOPE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-20 | 1968-04-20 | 1968-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-20 | 1972-04-20 | 1972-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-20 | 1976-04-20 | 1976-10-20 | $7700.00 | Window Closed / Lapsed |