US3193759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gain control means
Assignee: International Business Machines Corp
•
Filing: 1961-02-24
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Granted: 1965-07-06
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Expires: 1981-02-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles A Bogdan
- 👤 Fredric C Fitzgerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:35
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/02; G; G01; G01S; G01S7/00; G01S7/02; G01S7/35; G01S7/352
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A VOLTAGE SIGNAL GAIN CONTROL CIRCUIT FOR USE WITH LOW LEVEL ALTERNATING SIGNALS IN THE RANGE OF 200 CYCLES PER SECOND TO 8 MEGACYCLES, COMPRISING: AN INPUT CONSISTING OF A SIGNAL TERMINAL AND A COMMON TERMINAL ADAPTED TO RECEIVE SAID ALTERNATING SIGNALS; A SCALING RESISTANCE CONNECTED TO SAID SIGNAL TERMINAL; FIRST SEMICONDUCTING DIODE MEANS CONNECTED TO THE FREE END OF SAID SCALING RESISTANCE AND SAID COMMON TERMINAL; SECOND SEMICONDUCTING DIODE MEANS HAVING ONE LEAD CONNECTED TO SAID FIRST DIODE MEANS SUCH THAT THE FORWARD DIRECTION OF EACH DIODE MEANS IS OPPOSED TO THE OTHER; CAPACITANCE LINKING MEANS CONNECTED FROM THE FREE END OF SAID SECOND DIODE MEANS TO SAID COMMON TERMINAL; REMOTELY LOCATED SELECTIVELY VARIABLE CURRENT SUPPLY MEANS ADAPTED TO PROVIDE BIAS CURRENT TO SAID DIODE MEANS FOR BIASING SAID FIRST DIODE MEANS TO OPERATION IN THE KNEE REGION OF ITS CURRENTVOLTAGE CHARACTERISTIC CURVE AND OUTPUT MEANS FOR PROVIDING THE CONTROLLED SIGNAL VOLTAGE AS MEASURED ACROSS SAID FIRST DIODE MEANS.
Claim 2
Dependent Claim
160 words
A VOLTAGE SIGNAL GAIN CONTROL CIRCUIT FOR USE WITH LOW LEVEL ALTERNATING SIGNALS IN THE RANGE OF 200 CYCLES PER SECOND TO 8 MEGACYCLES, COMPRISING: AN INPUT CONSISTING OF A SIGNAL TERMINAL AND A COMMON TERMINAL ADAPTED TO RECEIVE SAID ALTERNATING SIGNALS; A SCALING RESISTANCE CONNECTED TO SAID SIGNAL TERMINAL; FIRST SEMICONDUCTING DIODE MEANS CONNECTED TO THE FREE END OF SAID SCALING RESISTANCE AND SAID COMMON TERMINAL; SECOND SEMICONDUCTING DIODE MEANS HAVING ONE LEAD CONNECTED TO SAID FIRST DIODE MEANS SUCH THAT THE FORWARD DIRECTION OF EACH DIODE MEANS IS OPPOSED TO THE OTHER; CAPACITANCE LINKING MEANS CONNECTED FROM THE FREE END OF SAID SECOND DIODE MEANS TO SAID COMMON TERMINAL; REMOTELY LOCATED SELECTIVELY VARIABLE CURRENT SUPPLY MEANS ADAPTED TO PROVIDE BIAS CURRENT TO SAID DIODE MEANS FOR BIASING SAID FIRST DIODE MEANS TO OPERATION IN THE KNEE REGION OF ITS CURRENTVOLTAGE CHARACTERISTIC CURVE AND OUTPUT MEANS FOR PROVIDING THE CONTROLLED SIGNAL VOLTAGE AS MEASURED ACROSS SAID FIRST DIODE MEANS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-07-05 | 1969-01-04 | 1969-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-05 | 1973-01-04 | 1973-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-05 | 1977-01-04 | 1977-07-06 | $7700.00 | Window Closed / Lapsed |