US3614644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifier apparatus with distortion compensation
Assignee: GTE Sylvania Inc
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Filing: 1969-12-15
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Granted: 1971-10-19
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Expires: 1989-12-15
Abstract
Abstract A transistor amplifier is shown wherein a second transistor is connected to generate distortion components substantially the same as those generated by non-linearities of the base-emitter junction of a transistor connected as the amplifier. The distortion components so generated are coupled to the emitter of the amplifier transistor to reduce the distortion due to the base-emitter nonlinearity.
Inventors
- 👤 Daniel Liberman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:40
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/32
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
121 words
In an amplifier having at least one semiconductive amplifying means including a transistor means with base, collector, and emitter electrodes, means for reducing distortion due to the nonlinearity of a junction between said base electrode and said emitter electrode comprising: means for providing a distortion signal including a second transistor means having base, emitter, and collector electrodes; and means connecting said emitter electrode of said first-named transistor means to said base electrode of said second transistor means for coupling the distortion signal to said emitter electrode of said first-named transistor means in a phase and amplitude relationship sufficient to substantially reduce the distortion caused by the nonlinearity of the junction betweEn said base and emitter electrodes of said first-named transistor means.
Claim 2
Dependent Claim
121 words
In an amplifier having at least one semiconductive amplifying means including a transistor means with base, collector, and emitter electrodes, means for reducing distortion due to the nonlinearity of a junction between said base electrode and said emitter electrode comprising: means for providing a distortion signal including a second transistor means having base, emitter, and collector electrodes; and means connecting said emitter electrode of said first-named transistor means to said base electrode of said second transistor means for coupling the distortion signal to said emitter electrode of said first-named transistor means in a phase and amplitude relationship sufficient to substantially reduce the distortion caused by the nonlinearity of the junction betweEn said base and emitter electrodes of said first-named transistor means.
Claim 3
Dependent Claim
56 words
An amplifier as defined in claim 1 wherein said means for providing a distortion signal further includes biasing means for biasing the electrodes of said second transistor means to establish quiescent bias conditions at the electrodes of said second transistor means substantially equal to the quiescent bias conditions at the electrodes of said first-named transistor means.
Claim 4
Dependent Claim
41 words
An amplifier as defined in claim 2 wherein said means connecting said emitter electrode of said first-named transistor means to said base electrode of said second transistor means includes a phase shift means for adjusting the phase of the distortion signal.
Claim 5
Dependent Claim
135 words
A transistor amplifier including a first transistor means having base means, collector means and emitter means, biasing means for establishing quiescent biasing conditions connected to said first transistor means, and input means connected to said base means to supply an input signal thereto in combination with a second transistor means having base means and emitter means, means for biasing said second transistor means, and means connecting said base means of said second transistor means to said emitter means of said first transistor means for coupling signal distortions due to the nonlinearity of the base-emitter junction of said second transistor means to said emitter means of said first transistor means in a phase and amplitude relationship sufficient to substantially reduce the signal distortion caused by the nonlinearity of the base-emitter junction of said first transistor means.
Claim 6
Dependent Claim
135 words
A transistor amplifier including a first transistor means having base means, collector means and emitter means, biasing means for establishing quiescent biasing conditions connected to said first transistor means, and input means connected to said base means to supply an input signal thereto in combination with a second transistor means having base means and emitter means, means for biasing said second transistor means, and means connecting said base means of said second transistor means to said emitter means of said first transistor means for coupling signal distortions due to the nonlinearity of the base-emitter junction of said second transistor means to said emitter means of said first transistor means in a phase and amplitude relationship sufficient to substantially reduce the signal distortion caused by the nonlinearity of the base-emitter junction of said first transistor means.
Claim 7
Dependent Claim
51 words
An amplifier as defined in claim 4 wherein said means connecting said base means of said second transistor means to said emitter means of said first transistor means includes a phase shift means for adjusting the phase of the signal distortions supplied to said emitter means of said first transistor means.
Claim 8
Dependent Claim
41 words
An amplifier as defined in claim 4 wherein said means for biasing said second transistor means includes a variable component for adjusting the magnitude of the signal distortions due to the nonlinearity of the base-emitter junction of said second transistor means.
Claim 9
Dependent Claim
40 words
An amplifier as defined in claim 6 wherein said means for biasing said second transistor means establishes quiescent biasing conditions at the electrodes of said second transistor means substantially equal to the quiescent biasing conditions of said first transistor means.
Claim 10
Dependent Claim
51 words
An amplifier as defined in claim 7 wherein said means connecting said base means of said second transistor means to said emitter means of said first transistor means includes a phase shift means for adjusting the phase of the signal distortions supplied to said emitter means of said first transistor 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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |