Patent US3207914A successfully refreshed from Google Patents.
US3207914A
Expired / Lapsed
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Frequency dividing system employing tunnel diode astable multivibrators
Assignee: NIHON GAKKI SEIZO KK
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Filing: 1960-08-29
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Granted: 1965-09-21
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Expires: 1980-08-29
Abstract
No abstract record available.
Inventors
- 👤 Mabuchi Shigeaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:01
CPC Classifications
H; H03; H03B; H03B19/00; H03B19/16; H03K; H03K3/00; H03K3/02; H03K3/313; H03K3/315
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A FREQUENCY DIVIDER COMPRISING, A TUNNEL DIODE EXHIBITING A VOLTAGE-CONTROLLED NEGATIVE RESISTANCE IN THE LOW FORWARD VOLTAGE RANGE OF ITS CURRENT-VOLTAGE CHARACTERISTIC; BIAS MEANS IN CIRCUIT WITH SAID DIODE FOR ESTABLISING A DIRECT CURRENT LOAD LINE WHICH INTERSECTS THE CURRENT-VOLTAGE CHARACTERSTIC OF SAID DIODE ONLY IN THE NEGATIVE RESISTANCE REGION OF SAID DIODE; A LOADING COIL CONNECTED IN SERIES WITH SAID BIAS MEANS AND SAID TUNNEL DIODE FORMING A RELAXATION OSCILLATOR OF A FREQUENCY F; AND A SERIES CIRCUIT INCLUDING A CONDENSER AND A RESISTOR COUPLING A SOURCE OF POWER OF PERIODIC SIGNALS OF A FREQUENCY F0 WHICH IS SLIGHTLY MOER THAN 2F BUT LESS THAN 3F TO A POINT WHERE SAID TUNNEL DIODE AND SAID LOADING COIL ARE CONNECTED TO EACH OTHER, IN ORDER TO DERIVE AN OUTPUT FREQUENCY OF F0/2.
Claim 2
Dependent Claim
132 words
A FREQUENCY DIVIDER COMPRISING, A TUNNEL DIODE EXHIBITING A VOLTAGE-CONTROLLED NEGATIVE RESISTANCE IN THE LOW FORWARD VOLTAGE RANGE OF ITS CURRENT-VOLTAGE CHARACTERISTIC; BIAS MEANS IN CIRCUIT WITH SAID DIODE FOR ESTABLISING A DIRECT CURRENT LOAD LINE WHICH INTERSECTS THE CURRENT-VOLTAGE CHARACTERSTIC OF SAID DIODE ONLY IN THE NEGATIVE RESISTANCE REGION OF SAID DIODE; A LOADING COIL CONNECTED IN SERIES WITH SAID BIAS MEANS AND SAID TUNNEL DIODE FORMING A RELAXATION OSCILLATOR OF A FREQUENCY F; AND A SERIES CIRCUIT INCLUDING A CONDENSER AND A RESISTOR COUPLING A SOURCE OF POWER OF PERIODIC SIGNALS OF A FREQUENCY F0 WHICH IS SLIGHTLY MOER THAN 2F BUT LESS THAN 3F TO A POINT WHERE SAID TUNNEL DIODE AND SAID LOADING COIL ARE CONNECTED TO EACH OTHER, IN ORDER TO DERIVE AN OUTPUT FREQUENCY OF F0/2.
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |