US3248557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor parametric reactance amplifier
Assignee: Bendix Corp
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Filing: 1959-07-20
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Granted: 1966-04-26
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Expires: 1979-07-20
Abstract
No abstract record available.
Inventors
- 👤 Lawrence E Dickens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:42
CPC Classifications
H; H03; H03F; H03F7/00; H03F7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A COMPOSITE AMPLIFIER COMPRISING A FIRST SEMICONDUCTOR P-N JUNCTION EXHIBITING A VOLTAGE VARIABLE NONLINEAR CAPACITANCE, MEANS FOR COUPLING AN INPUT SIGNAL OF A FIRST FREQUNCY ACROSS SAID JUNCTION, MEANS FOR APPLYING PUMP VOLTAGE OF A SECOND HIGHER FREQUENCY ACROSS SAID JUNCTION, A TUNED CIRCUIT CONNECTED TO SAID JUNCTION FOR SUPPLYING A RESONANT IMPEDANCE ACROSS WHICH APPEARS AN AMPLIFIED REPLICA OF SAID INPUT SIGNAL AT A FREQUENCY OF MF P+-NF1 WHERE FP IS SAID PUMP FREQUENCY, F1 IS SAID INPUT FREQUENCY AND M AND N ARE ANY INTEGERS, A SECOND P-N JUNCTION FORMED ON ONE SIDE OF AND SPACED FROM SAID FIRST JUNCTION, A LOAD CIRCUIT CONNECTED TO SAID SECOND JUNCTION ON THE SIDE REMOTE FROM THE SIDE COMMON TO BOTH JUNCTIONS AND TUNED TO SAID MFP+-NF1 FREQUENCY AND MEANS FOR BIASING SAID JUNCTIONS TO OBTAIN IN SAID LOAD CIRCUIT TRANSISTOR AMPLIFICATION OF SAID AMPLIFIER REPLICA.
Claim 2
Dependent Claim
145 words
A COMPOSITE AMPLIFIER COMPRISING A FIRST SEMICONDUCTOR P-N JUNCTION EXHIBITING A VOLTAGE VARIABLE NONLINEAR CAPACITANCE, MEANS FOR COUPLING AN INPUT SIGNAL OF A FIRST FREQUNCY ACROSS SAID JUNCTION, MEANS FOR APPLYING PUMP VOLTAGE OF A SECOND HIGHER FREQUENCY ACROSS SAID JUNCTION, A TUNED CIRCUIT CONNECTED TO SAID JUNCTION FOR SUPPLYING A RESONANT IMPEDANCE ACROSS WHICH APPEARS AN AMPLIFIED REPLICA OF SAID INPUT SIGNAL AT A FREQUENCY OF MF P+-NF1 WHERE FP IS SAID PUMP FREQUENCY, F1 IS SAID INPUT FREQUENCY AND M AND N ARE ANY INTEGERS, A SECOND P-N JUNCTION FORMED ON ONE SIDE OF AND SPACED FROM SAID FIRST JUNCTION, A LOAD CIRCUIT CONNECTED TO SAID SECOND JUNCTION ON THE SIDE REMOTE FROM THE SIDE COMMON TO BOTH JUNCTIONS AND TUNED TO SAID MFP+-NF1 FREQUENCY AND MEANS FOR BIASING SAID JUNCTIONS TO OBTAIN IN SAID LOAD CIRCUIT TRANSISTOR AMPLIFICATION OF SAID AMPLIFIER REPLICA.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |