US4419636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low frequency wide band signal coupler
Assignee: Individual
•
Filing: 1981-10-22
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Granted: 1983-12-06
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Expires: 2001-10-22
Abstract
Abstract One circuit is a low frequency, wide band multi-directional tap that exhibits good match characteristics with low through loss. The circuit has input and output terminals conductively interconnected, a tap output terminal, an inductive winding having n 1 /n 2 series turns and a series resistor coupling from the tap on the inductive winding to the tap output terminal. The other circuit is a low frequency, wide band multi-directional signal splitter that also exhibits good match characteristics with low through loss. The circuit has an input terminal and two output terminals interconnected by three core transformers each having an isolation resistor associated therewith.
Inventors
- 👤 Hong Yu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:50
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/48
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
94 words
A low frequency, wide band signal coupler comprising; an input terminal for receiving an input signal in the frequency range of 1 KHz to 900 MHz, a first output terminal, a second output terminal, three transformers each having a pair of windings including a first and second winding, means coupling the input and first and second output terminals to respective first windings of the respective three transformers, means coupling the three second windings in a series circuit, three isolation resistors, and means coupling the isolation resistors each respectively across one of said second windings.
Claim 2
Dependent Claim
94 words
A low frequency, wide band signal coupler comprising; an input terminal for receiving an input signal in the frequency range of 1 KHz to 900 MHz, a first output terminal, a second output terminal, three transformers each having a pair of windings including a first and second winding, means coupling the input and first and second output terminals to respective first windings of the respective three transformers, means coupling the three second windings in a series circuit, three isolation resistors, and means coupling the isolation resistors each respectively across one of said second windings.
Claim 3
Dependent Claim
16 words
A signal coupler as set forth in claim 1 wherein the frequency range is 0.01-5.0 MHz.
Claim 4
Dependent Claim
29 words
A signal coupler as set forth in claim 1 including conductive electrical means intercoupling the first and second windings of each transformer at an intermediate point of their ends.
Claim 5
Dependent Claim
16 words
A signal coupler as set forth in claim 1 using coaxial cable input and output connections.
Claim 6
Dependent Claim
26 words
A signal coupler as set forth in claim 4 wherein the isolation resistors are of a value on the order of twice the coaxial cable impedance.
Claim 7
Dependent Claim
21 words
A signal coupler as set forth in claim 5 wherein the isolation resistors are each on the order of 150 ohms.
References Cited (Backward Citations)
US3559110A
Cited
US3747028A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |