Patent US5148062A successfully refreshed from Google Patents.
US5148062A
Expired / Lapsed
US
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Simplified phase shifter circuit
Assignee: Raytheon Co
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Filing: 1991-12-19
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Granted: 1992-09-15
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Expires: 2011-12-19
Abstract
Abstract A phase shifter network which alternates between structurally dual networks is provided. In particular, the phase shifter has a topography which permits the network to be configured as alternatively T or π networks of low pass and high pass delay circuits in accordance with states of a single control signal fed to the phase shifter.
Inventors
- 👤 Marc E. Goldfarb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:20
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/18; H03H7/20; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/687; H03K17/6871
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
193 words
A phase shifter network comprising: a pair of inductors, each one thereof having a first end serially coupled to a common junction; a capacitor element coupled in shunt between a reference potential and the common junction; a first switching device having one input thereof coupled to the common junction and the first end of a first one of the pair of inductor elements and a second input thereof coupled to the reference potential; a second switching device having one input thereof coupled to the common junction and the first end of a second one of the inductor elements and a second input thereof coupled to the reference potential; a second capacitor having a first electrode coupled to an input terminal network; and a transistor having a pair of electrodes with a first one of the electrodes of the transistor coupled to a second electrode of said second capacitor and a second one of said electrodes of the transistor being coupled to an output terminal network with a control electrode of said transistor being coupled to control electrodes of said first and second switching devices and to a common control terminal of the network.
Claim 2
Dependent Claim
193 words
A phase shifter network comprising: a pair of inductors, each one thereof having a first end serially coupled to a common junction; a capacitor element coupled in shunt between a reference potential and the common junction; a first switching device having one input thereof coupled to the common junction and the first end of a first one of the pair of inductor elements and a second input thereof coupled to the reference potential; a second switching device having one input thereof coupled to the common junction and the first end of a second one of the inductor elements and a second input thereof coupled to the reference potential; a second capacitor having a first electrode coupled to an input terminal network; and a transistor having a pair of electrodes with a first one of the electrodes of the transistor coupled to a second electrode of said second capacitor and a second one of said electrodes of the transistor being coupled to an output terminal network with a control electrode of said transistor being coupled to control electrodes of said first and second switching devices and to a common control terminal of the network.
Claim 3
Dependent Claim
18 words
The circuit, as recited in claim 1, wherein said first and second switching devices are field effect transistors.
Claim 4
Dependent Claim
62 words
The circuit of claim 2 further comprising: a pair of resistors, a first one thereof being coupled between the first end of the first one of the pair of inductors and the common junction and a second one of the pair of resistors being coupled between the first end of the second one of the pair of inductors and the common junction.
Claim 5
Dependent Claim
133 words
A phase shifter comprising: a first transistor having a pair of electrodes, a first one of said electrodes being coupled to an input terminal of, the network; a first inductor, having a first end coupled to a second one of the electrodes of said first transistor and a second end coupled to an output terminal of the network; a pair of capacitors having first ends coupled to a junction and being coupled in series between the input and output electrodes of the network; a second inductor coupled between the junction and a reference potential; a second transistor coupled between the first end of a first one of said capacitors and said reference potential; and a third transistor coupled between the first end of a second one of said capacitors and said reference potential.
Claim 6
Dependent Claim
133 words
A phase shifter comprising: a first transistor having a pair of electrodes, a first one of said electrodes being coupled to an input terminal of, the network; a first inductor, having a first end coupled to a second one of the electrodes of said first transistor and a second end coupled to an output terminal of the network; a pair of capacitors having first ends coupled to a junction and being coupled in series between the input and output electrodes of the network; a second inductor coupled between the junction and a reference potential; a second transistor coupled between the first end of a first one of said capacitors and said reference potential; and a third transistor coupled between the first end of a second one of said capacitors and said reference potential.
Claim 7
Dependent Claim
37 words
The phase shifter of claim 4 further comprising: a pair of resistors having first ends connected to said first ends of said pair of capacitors and second ends of said pair of resistors connected to the junction.
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) | 1995-09-15 | 1996-03-16 | 1996-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-15 | 2000-03-16 | 2000-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-15 | 2004-03-16 | 2004-09-15 | $7700.00 | Window Closed / Lapsed |