US3955146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for coupling an antenna to a load
Assignee: United States Department of the Navy
•
Filing: 1972-06-30
•
Granted: 1976-05-04
•
Expires: 1992-06-30
Abstract
Abstract A circuit coupling an antenna to a load uses an integrated circuit differial amplifier with emitter feedback, a buffer amplifier and various adjusting networks to achieve constant output impedance independent of input loading over a wide range of frequencies. The adjusting networks also allow precision gain matching and phase matching between units.
Inventors
- 👤 Richard L. Brennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:44
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A circuit for coupling a variable impedance source to a constant impedance load comprising: means, connected to the source, for amplifying a signal from the source, said means including a fixed-gain differential amplifier having emitter feedback; means, connected between the amplifying means and the load, for presenting a constant impedance output to the load, said output impedance being equal to the impedance of the load, said constant impedance output means comprising a complementary emitter follower, the latter including a PNP transistor, a NPN transistor and a diode having its anode connected to the base of the NPN transistor and its cathode connected to the base of the PNP transistor; and means for adjusting the phase of the signal connected between the amplifier and the emitter follower.
Claim 2
Dependent Claim
126 words
A circuit for coupling a variable impedance source to a constant impedance load comprising: means, connected to the source, for amplifying a signal from the source, said means including a fixed-gain differential amplifier having emitter feedback; means, connected between the amplifying means and the load, for presenting a constant impedance output to the load, said output impedance being equal to the impedance of the load, said constant impedance output means comprising a complementary emitter follower, the latter including a PNP transistor, a NPN transistor and a diode having its anode connected to the base of the NPN transistor and its cathode connected to the base of the PNP transistor; and means for adjusting the phase of the signal connected between the amplifier and the emitter follower.
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) | 1979-05-04 | 1979-11-03 | 1980-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-04 | 1983-11-03 | 1984-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-04 | 1987-11-03 | 1988-05-04 | $7700.00 | Window Closed / Lapsed |