US3268828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifier with constant amplitude output
Assignee: Unisys Corp
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Filing: 1962-11-02
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Granted: 1966-08-23
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Expires: 1982-11-02
Abstract
No abstract record available.
Inventors
- 👤 Mollinga Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:27
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0052
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
AN AMPLIFIER WITH DIRECT-CURRENT CONTROLLED GAIN COMPRISING: (A) A SOURCE OF DIRECT-CURRENT BIAS VOLTAGE; (B) A SOURCE OF ALTERNATING-CURRENT VOLTAGE TO BE AMPLIFIED; (C) A STAGE OF AMPLIFICATION HAVING INPUT TERMINALS AND OUTPUT TERMINALS, THE STAGE BEING BIASED BY THE SOURCE OF BIAS VOLTAGE SO AS TO OPERATE CLASS A; (D) MEANS CONNECTING THE SOURCE OF ALTERNATING-CURRENT VOLTAGE TO THE INPUT TERMINALS OF THE STAGE OF AMPLIFICATION; (E) A SERIES CIRCUIT CONNECTED ACROSS THE SOURCE OF BIAS VOLTAGE, THE SERIES CIRCUIT INCLUDING; (1) AN IMPEDANCE ELEMENT, THE IMPEDANCE OF WHICH VARIES INVERSELY AS A FUNCTION OF THE DIRECT-CURRENT PASSING THERETHROUGH; (2) AND A CONSTANT CURRENT SOURCE, THE CONSTANT CURRENT SOURCE BEING RESPONSIVE TO A DIRECT-CURRENT CONTROL VOLTAGE SO AS TO CHANGE THE DIRECTCURRENT PASSING THROUGH THE IMPEDANCE ELEMENT. (F) AND MEANS DIRECTLY CONNECTING ONE OF THE OUTPUT TERMINALS OF THE STAGE OF AMPLIFICATION TO A POINT IN THE SERIES CIRCUIT BETWEEN THE IMPEDANCE ELEMENT AND THE CONSTANT CURRENT SOURCE, THE IMPEDANCE OF THE IMPEDANCE ELEMENTT INFLUENCING THE OUTPUT IMPEDANCE OF THE STAGE OF AMPLIFICATION.
Claim 2
Dependent Claim
174 words
AN AMPLIFIER WITH DIRECT-CURRENT CONTROLLED GAIN COMPRISING: (A) A SOURCE OF DIRECT-CURRENT BIAS VOLTAGE; (B) A SOURCE OF ALTERNATING-CURRENT VOLTAGE TO BE AMPLIFIED; (C) A STAGE OF AMPLIFICATION HAVING INPUT TERMINALS AND OUTPUT TERMINALS, THE STAGE BEING BIASED BY THE SOURCE OF BIAS VOLTAGE SO AS TO OPERATE CLASS A; (D) MEANS CONNECTING THE SOURCE OF ALTERNATING-CURRENT VOLTAGE TO THE INPUT TERMINALS OF THE STAGE OF AMPLIFICATION; (E) A SERIES CIRCUIT CONNECTED ACROSS THE SOURCE OF BIAS VOLTAGE, THE SERIES CIRCUIT INCLUDING; (1) AN IMPEDANCE ELEMENT, THE IMPEDANCE OF WHICH VARIES INVERSELY AS A FUNCTION OF THE DIRECT-CURRENT PASSING THERETHROUGH; (2) AND A CONSTANT CURRENT SOURCE, THE CONSTANT CURRENT SOURCE BEING RESPONSIVE TO A DIRECT-CURRENT CONTROL VOLTAGE SO AS TO CHANGE THE DIRECTCURRENT PASSING THROUGH THE IMPEDANCE ELEMENT. (F) AND MEANS DIRECTLY CONNECTING ONE OF THE OUTPUT TERMINALS OF THE STAGE OF AMPLIFICATION TO A POINT IN THE SERIES CIRCUIT BETWEEN THE IMPEDANCE ELEMENT AND THE CONSTANT CURRENT SOURCE, THE IMPEDANCE OF THE IMPEDANCE ELEMENTT INFLUENCING THE OUTPUT IMPEDANCE OF THE STAGE OF AMPLIFICATION.
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) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |