US4379264A
Expired / Lapsed
US
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Broadband phase shifter
Assignee: Mobil Oil AS
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Filing: 1980-08-11
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Granted: 1983-04-05
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Expires: 2000-08-11
Abstract
Abstract An electronic circuit which operates as a phase shifter is disclosed which uses a phase inversion principle. The circuit is broadband and may be either manually or electronically operated.
Inventors
- 👤 Wilfried K. Lenhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:44
CPC Classifications
G; G01; G01R; G01R25/00; G01R25/04; H; H03; H03H; H03H11/00; H03H11/02; H03H11/16; H03H11/20
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
104 words
A phase shifting circuit comprising: receiving means for receiving an incoming electrical signal having a frequency selected from a wide band of frequencies and producing two signals one 90 degrees out of phase with the other; having amplitudes approximately equal to said incoming electrical signal first gain means for amplitude varying one of said two signals over a continuous range; second gain means for amplitude varying an other of said two signals over a continuous range and combining means for combining said one amplitude varied signal and said other amplitude varied signal and producing a signal having a phase shift from said incoming signal.
Claim 2
Dependent Claim
104 words
A phase shifting circuit comprising: receiving means for receiving an incoming electrical signal having a frequency selected from a wide band of frequencies and producing two signals one 90 degrees out of phase with the other; having amplitudes approximately equal to said incoming electrical signal first gain means for amplitude varying one of said two signals over a continuous range; second gain means for amplitude varying an other of said two signals over a continuous range and combining means for combining said one amplitude varied signal and said other amplitude varied signal and producing a signal having a phase shift from said incoming signal.
Claim 3
Dependent Claim
19 words
The phase shifting circuit according to claim 1 wherein said receiving means includes means for providing a reference signal.
Claim 4
Dependent Claim
17 words
The phase shifting circuit according to claim 1 wherein said receiving means comprises a quadrature hybrid circuit.
Claim 5
Dependent Claim
23 words
The phase shifting circuit according to claim 3 wherein said first gain means and second gain means comprise phase inverting variable gain devices.
Claim 6
Dependent Claim
42 words
The phase shifting circuit according to claim 4 wherein said phase inverting variable gain devices are selected from a group consisting of a step attenuator, electronic attenuator, a combination gain and attenuation device, a double balance mixer, and a gain control amplifier.
Claim 7
Dependent Claim
27 words
The phase shifting circuit according to claim 4 additionally including control means for selectively controlling the gain of said first gain means and said second gain means.
Claim 8
Dependent Claim
25 words
The phase shifting circuit according to claim 6 wherein said control means includes means for converting a desired phase shift to a gain control current.
Claim 9
Independent Claim
87 words
A method for providing a phase shift to an incoming signal selected from a broad band of frequencies comprising the steps of: receiving an incoming signal; dividing said incoming signal into a first signal and a second signal 90 degrees out of phase with said first signal; selectively gain varying said first signal and second signal over a continuous range and combining said gain varied first signal and said gain varied second signal to provide a third signal having a predetermined phase shift from said incoming signal.
Claim 10
Independent Claim
87 words
A method for providing a phase shift to an incoming signal selected from a broad band of frequencies comprising the steps of: receiving an incoming signal; dividing said incoming signal into a first signal and a second signal 90 degrees out of phase with said first signal; selectively gain varying said first signal and second signal over a continuous range and combining said gain varied first signal and said gain varied second signal to provide a third signal having a predetermined phase shift from said incoming signal.
Claim 11
Dependent Claim
19 words
The method according to claim 8 also including the step of detecting said first signal as a reference signal.
Claim 12
Dependent Claim
98 words
A phase shifting circuit comprising: first means for dividing an incoming signal having a frequency within a wide band of frequencies into two signals, one 90 degrees out of phase with the other each having an amplitude approximately equal to said incoming signal second means for selectively varying the amplitude of one of said two signals and an other of said two signals each over a continuous range; and third means for combining said amplitude varied one signal and said amplitude varied other signal to provide a third signal having a predetermined phase shift from said incoming signal.
Claim 13
Dependent Claim
98 words
A phase shifting circuit comprising: first means for dividing an incoming signal having a frequency within a wide band of frequencies into two signals, one 90 degrees out of phase with the other each having an amplitude approximately equal to said incoming signal second means for selectively varying the amplitude of one of said two signals and an other of said two signals each over a continuous range; and third means for combining said amplitude varied one signal and said amplitude varied other signal to provide a third signal having a predetermined phase shift from said incoming signal.
Claim 14
Dependent Claim
22 words
The phase shifting circuit according to claim 10 also including the fourth means for receiving said one signal as a reference signal.
Claim 15
Dependent Claim
19 words
The phase shifting circuit according to claim 11 also including fifth means for controlling gain of said second means.
Claim 16
Independent Claim
105 words
An apparatus for providing a phase shift to an incoming signal selected from a broad band of frequencies comprising: quadrature hybrid circuit for receiving the incoming signal and dividing it into two signals one 90 degrees out of phase with the other; first device for varying the amplitude of said one of two signals over a continuous range second device for varying the amplitude of said other of said two signals over a continuous range and summing circuit for adding said amplitude varied one signal and said amplitude varied other signal and producing a third signal having a preselected phase difference from said incoming signal.
Claim 17
Independent Claim
105 words
An apparatus for providing a phase shift to an incoming signal selected from a broad band of frequencies comprising: quadrature hybrid circuit for receiving the incoming signal and dividing it into two signals one 90 degrees out of phase with the other; first device for varying the amplitude of said one of two signals over a continuous range second device for varying the amplitude of said other of said two signals over a continuous range and summing circuit for adding said amplitude varied one signal and said amplitude varied other signal and producing a third signal having a preselected phase difference from said incoming signal.
Claim 18
Dependent Claim
26 words
The apparatus according to claim 12 also including a conductor connected to the output of said quadrature hybrid for detecting one signal as a reference signal.
Claim 19
Dependent Claim
33 words
The apparatus according to claim 14 also including a first and a second gain control circuit for providing a gain control current to control the gain of said first and said second devices.
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) | 1986-04-04 | 1986-10-04 | 1987-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-04 | 1990-10-04 | 1991-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-04 | 1994-10-04 | 1995-04-05 | $7700.00 | Window Closed / Lapsed |