US4213083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for compensating transmission errors of a transformer
Assignee: Siemens AG
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Filing: 1977-08-29
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Granted: 1980-07-15
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Expires: 1997-08-29
Abstract
Abstract A circuit arrangement for compensating for the transmission errors introduced into a desired signal by passage of the signal through a transformer arrangement. The circuit arrangement comprises a phase-shift which is responsive to the output of the secondary of the transformer and which generates a compensating signal whose phase and amplitude are adjusted such that the compensating signal when combined with the desired signal and passed therewith through the transformer substantially cancels the errors in the desired signal resulting from the transformer. The circuit arrangement is further provided with a summer for combining the desired and compensation signals prior to application of the former signal to the transformer.
Inventors
- 👤 Hanz-Joachim Freygang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:13
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/34; H03F1/347; H01; H01F; H01F27/00; H01F27/42; H01F27/422; H01F27/425
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
184 words
A circuit arrangement for compensating for the transmission errors occurring in a desired signal as a result of passage of said desired signal through a transformer, said transformer having a primary winding and secondary winding, said secondary winding being adapted to be connected to a load impedance, said circuit arrangement comprising: phase shift means adapted to be responsive to the output of said secondary winding for generating a compensating signal having a phase and amplitude adjusted so as to result in the substantial cancellation of the transmission errors occurring in said desired signal when combined with said desired signal and passed therewith through said transformer; combining means for combining said compensating signal and said desired signal for application to said primary winding of said transformer; first means responsive to the output of said secondary winding applied to said load impedance for generating a signal which is in phase with the current flowing through said load impedance and whose amplitude is proportional to the amplitude of said current; and second means for coupling the signal generated by said first means to said phase shift means.
Claim 2
Dependent Claim
184 words
A circuit arrangement for compensating for the transmission errors occurring in a desired signal as a result of passage of said desired signal through a transformer, said transformer having a primary winding and secondary winding, said secondary winding being adapted to be connected to a load impedance, said circuit arrangement comprising: phase shift means adapted to be responsive to the output of said secondary winding for generating a compensating signal having a phase and amplitude adjusted so as to result in the substantial cancellation of the transmission errors occurring in said desired signal when combined with said desired signal and passed therewith through said transformer; combining means for combining said compensating signal and said desired signal for application to said primary winding of said transformer; first means responsive to the output of said secondary winding applied to said load impedance for generating a signal which is in phase with the current flowing through said load impedance and whose amplitude is proportional to the amplitude of said current; and second means for coupling the signal generated by said first means to said phase shift means.
Claim 3
Dependent Claim
22 words
A circuit arrangement in accordance with claim 1 wherein: said phase shift means includes a phase shifter having an adjustable phase shift.
Claim 4
Dependent Claim
22 words
A circuit arrangement in accordance with claim 1 wherein: said phase shifter has an output to input signal ratio which is adjustable.
Claim 5
Dependent Claim
53 words
A circuit arrangement in accordance with claim 1 wherein: said combining means comprises a summing circuit, said summing circuit having inputs for receiving said desired signal and said compensating signal, a summing point at which said desired and compensating signals are summed, and an output coupling the sum signal to said primary winding.
Claim 6
Dependent Claim
75 words
A circuit arrangement in accordance with claim 4 wherein: said summing circuit includes a power amplifier having an output adapted to be connected to said primary winding; and said compensating signal has a phase and amplitude adjusted so as to result in substantial cancellation of the transmission errors occurring in said desired signal as a result of passage through said power amplifier and said transformer when summed with said desired signal at said summing point.
Claim 7
Dependent Claim
28 words
A circuit arrangement in accordance with claim 1 wherein: said means responsive to said output comprises a resistor adapted to be connected in series with said load impedance.
Claim 8
Dependent Claim
89 words
Apparatus in accordance with claim 1 wherein said phase shift means includes: a first amplifier arrangement responsive to the signal generated by said first means, said first amplifier arrangement having an adjustable gain and causing substantially zero phase shift to signals passing therethrough; and a second amplifier arrangment responsive to the signal generated by said first means, said means amplifier arrangement having an adjustable gain and causing a 90° phase shift to signals passing therethrough; the outputs of said first and second amplifiers being coupled to said combining means.
Claim 9
Dependent Claim
56 words
A circuit arrangement in accordance with claim 7 wherein: said phase shift means further includes: a third amplifier arrangement having an input adapted to be connected to said secondary winding, an adjustable gain, and causing a 90° phase shift to signals passing therethrough; the output of said third amplifier arrangement being coupled to said combining means.
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) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |