US3735245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase shifter circuit
Assignee: AG Communication Systems Corp
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Filing: 1971-12-20
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Granted: 1973-05-22
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Expires: 1991-12-20
Abstract
Abstract A phase shift circuit capable of shifting the phase of an input signal over a 360* range. It consists of a center tapped feed transformer with its outer terminals connected across the outer terminals of a potentiometer. The movable arm of the potentiometer is connected through a capacitor to one or the other of the outer terminals of the transformer, with the phase shifted output taken from the potentiometer arm and a center tap of the transformer.
Inventors
- 👤 A Stigvils
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:38
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/18; H03H7/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
Phase shifting apparatus comprising: input terminal means and output terminal means, a transformer having a primary winding connected to said input terminals and a center tapped secondary winding having a first and second terminal and a center tap terminal, said center tap terminal connected to a neutral potential, a potentiometer having a pair of end terminals and a wiper arm terminal, said end terminals each connected to a terminal of said secondary winding, a transfer switch having a first and a second terminal connected respectively to said first and second terminals of said transformer secondary winding and a transfer terminal, a capacitor having a first terminal connected to said wiper arm terminal and a second terminal connected to said transfer terminal, said output terminal means connected to said wiper arm terminal and said transformer center tap.
Claim 2
Dependent Claim
136 words
Phase shifting apparatus comprising: input terminal means and output terminal means, a transformer having a primary winding connected to said input terminals and a center tapped secondary winding having a first and second terminal and a center tap terminal, said center tap terminal connected to a neutral potential, a potentiometer having a pair of end terminals and a wiper arm terminal, said end terminals each connected to a terminal of said secondary winding, a transfer switch having a first and a second terminal connected respectively to said first and second terminals of said transformer secondary winding and a transfer terminal, a capacitor having a first terminal connected to said wiper arm terminal and a second terminal connected to said transfer terminal, said output terminal means connected to said wiper arm terminal and said transformer center tap.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |