US3739294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplifier with a velocity-modulated tube and a compensation circuit for the correction of phase distortions
Assignee: Siemens AG
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Filing: 1971-07-28
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Granted: 1973-06-12
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Expires: 1991-07-28
Abstract
Abstract An amplifier with a velocity-modulated tube and a phase compensation circuit connected to the output of the tube wherein a controllable reactance is included within the phase compensation circuit and controlled in accordance with the modulation of the velocity-modulated tube by way of a directional coupler and a demodulator. The output signal of the velocitymodulated tube is reflected by way of a circulator and a line to which the controllable reactance is employed as a line termination so that the phase rotation provided by the reflected signal of the line compensates for the phase distortion of the amplifier signal which occurs in the velocity-modulated tube.
Inventors
- 👤 H Heynisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:33
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/32; H03F1/3223; H03F3/00; H03F3/54
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
199 words
An amplifier circuit comprising: a velocity-modulated tube having an input for receiving a signal to be amplified and an output, a predistortion circuit connected to said input of said velocity modulated tube for initial amplitude compensation, and a compensation circuit connected to the output of said tube for compensating phase distortions, said compensation circuit comprising: a directional coupler having an input connected to the output of said tube and first and second outputs; a circulator having a main input connected to said first output, a main output and a combination input/output; a transmission line connected to said combination input/output to receive and deliver signals; a controllable reactance connected as the termination of said transmission line and having a control input, said transmission line and said controllable reactance effective to reflect the signal received from said circulator with phase modulations opposed to those of such received signal; a demodulator having an input and an output; means coupling the input of said demodulator to the second output of said directional coupler; and means coupling the output of said demodulator to the control input of said controllable reactance, said demodulator operable to derive the phase distorted modulation signal for controlling said reactance.
Claim 2
Dependent Claim
199 words
An amplifier circuit comprising: a velocity-modulated tube having an input for receiving a signal to be amplified and an output, a predistortion circuit connected to said input of said velocity modulated tube for initial amplitude compensation, and a compensation circuit connected to the output of said tube for compensating phase distortions, said compensation circuit comprising: a directional coupler having an input connected to the output of said tube and first and second outputs; a circulator having a main input connected to said first output, a main output and a combination input/output; a transmission line connected to said combination input/output to receive and deliver signals; a controllable reactance connected as the termination of said transmission line and having a control input, said transmission line and said controllable reactance effective to reflect the signal received from said circulator with phase modulations opposed to those of such received signal; a demodulator having an input and an output; means coupling the input of said demodulator to the second output of said directional coupler; and means coupling the output of said demodulator to the control input of said controllable reactance, said demodulator operable to derive the phase distorted modulation signal for controlling said reactance.
Claim 3
Dependent Claim
23 words
The amplifier according to claim 1, wherein said means coupling said directional coupler and said demodulator includes a transformer for increasing wave resistance.
Claim 4
Dependent Claim
22 words
The amplifier according to claim 1, wherein the last-mentioned coupling means includes adjustable damping means for adjusting the control of said reactance.
Claim 5
Dependent Claim
14 words
The amplifier according to claim 1, wherein said controllable reactance includes a capacitance diode.
Claim 6
Dependent Claim
58 words
The amplifier according to claim 1, wherein said means coupling said directional coupler and said demodulator includes a transformer for increasing wave resistance, said means coupling the output of said demodulator to the control input of said controllable reaCtance includes adjustable damping means for adjusting the control of said reactance, and said controllable reactance includes a capacitance diode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |