US4024452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated solid state isolator circuit
Assignee: AT&T Inc
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Filing: 1976-03-10
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Granted: 1977-05-17
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Expires: 1996-03-10
Abstract
Abstract Disclosed is a ground isolating circuit adapted for construction on a single integrated circuit surface. The circuit comprises a microwave oscillator responsive to an applied data signal, a planar transformer for coupling the microwave signals generated by the oscillator, and a detector for rectifying the coupled, ground isolated microwave signal.
Inventors
- 👤 Harold Seidel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:15
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
69 words
An integrated circuit for developing an output signal in response to, but isolated from, an input signal comprising: an oscillator activated by said input signal for generating microwave signals; a planar transformer having a primary and a secondary winding, with said primary winding being responsive to said microwave signals; and means connected to said secondary winding for rectifying the signal of said secondary winding to develop said output signal.
Claim 2
Dependent Claim
69 words
An integrated circuit for developing an output signal in response to, but isolated from, an input signal comprising: an oscillator activated by said input signal for generating microwave signals; a planar transformer having a primary and a secondary winding, with said primary winding being responsive to said microwave signals; and means connected to said secondary winding for rectifying the signal of said secondary winding to develop said output signal.
Claim 3
Dependent Claim
47 words
The circuit of claim 1 wherein said primary winding of said planar transformer comprises a first fixed length planar conductor and wherein said secondary winding of said planar transformer comprises a second fixed length planar conductor situated in proximity and parallel to said first length planar conductor.
Claim 4
Dependent Claim
23 words
The circuit of claim 1 wherein said oscillator, said planar transformer and said means for rectifying are constructed on a signal semiconductor surface.
Claim 5
Independent Claim
93 words
A method for providing ground isolation between a first circuit supplying a data signal and a second circuit receiving a replica signal of said data signal comprising the steps of: applying said data signal to an oscillator so as to cause said oscillator to develop a microwave frequency signal; applying said microwave frequency signal to a primary winding of a planar transformer for coupling said microwave frequency signal to a secondary winding of said transformer; and rectifying the output signal of said secondary transformer for developing said replica signal of said data signal.
Claim 6
Independent Claim
93 words
A method for providing ground isolation between a first circuit supplying a data signal and a second circuit receiving a replica signal of said data signal comprising the steps of: applying said data signal to an oscillator so as to cause said oscillator to develop a microwave frequency signal; applying said microwave frequency signal to a primary winding of a planar transformer for coupling said microwave frequency signal to a secondary winding of said transformer; and rectifying the output signal of said secondary transformer for developing said replica signal of said data signal.
Claim 7
Independent Claim
82 words
A method for providing ground isolation between a first circuit supplying a data signal and a second circuit receiving a replica signal of said data signal comprising the steps of: developing a microwave frequency signal in response to said data signal; applying said developed microwave frequency signal to an integrated circuit planar transformer to provide a ground isolated replica signal of said developed microwave frequency signal; and rectifying said ground isolated replica signal, developing thereby said replica signal of said data signal.
Claim 8
Independent Claim
82 words
A method for providing ground isolation between a first circuit supplying a data signal and a second circuit receiving a replica signal of said data signal comprising the steps of: developing a microwave frequency signal in response to said data signal; applying said developed microwave frequency signal to an integrated circuit planar transformer to provide a ground isolated replica signal of said developed microwave frequency signal; and rectifying said ground isolated replica signal, developing thereby said replica signal of said data signal.
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) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |