Strain error compensation amplifier
First Claim
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1. A strain compensation amplifier comprising:
- a strain detection circuit in which an input signal is distributed by a power distributor, and a signal obtained by amplifying one output by a main amplifier via a first variable attenuator and a first variable phase unit is synthesized with a signal obtained by adjusting a timing of another output distributed from said power distributor by a first delay unit by a first power synthesizer to detect a strain component generated in said main amplifier; and
a strain removal circuit in which a signal obtained by amplifying said strain component outputted from said first power synthesizer by an auxiliary amplifier via a second variable attenuator and a second variable phase unit is reverse-phase synthesized with a signal obtained by adjusting a timing of a signal outputted from said first power synthesizer and amplified by the main amplifier by a second delay unit by a second power synthesizer to offset said strain component, a monitor output is obtained by a directional coupler, and a unidirectional property is enhanced by an isolator to obtain a power synthesis output, wherein at least two or more of said power distributor, said first delay unit, said first power synthesizer, said second delay unit, said second power synthesizer, said directional coupler, said isolator, a terminating resistor of said second power synthesizer, and the terminating resistor of said directional coupler are unified.
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Abstract
According to the present invention, there is provided a strain (error) compensation amplifier which realizes miniaturization, loss reduction, and cost reduction. In the strain (error) compensation amplifier, by unifying at least two or more of a power distributor, a first delay unit, a first power synthesizer, a second delay unit, a second power synthesizer, a directional coupler, an isolator and a terminating resistor, the miniaturization, loss reduction, and cost reduction are realized.
23 Citations
22 Claims
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1. A strain compensation amplifier comprising:
- a strain detection circuit in which an input signal is distributed by a power distributor, and a signal obtained by amplifying one output by a main amplifier via a first variable attenuator and a first variable phase unit is synthesized with a signal obtained by adjusting a timing of another output distributed from said power distributor by a first delay unit by a first power synthesizer to detect a strain component generated in said main amplifier; and
a strain removal circuit in which a signal obtained by amplifying said strain component outputted from said first power synthesizer by an auxiliary amplifier via a second variable attenuator and a second variable phase unit is reverse-phase synthesized with a signal obtained by adjusting a timing of a signal outputted from said first power synthesizer and amplified by the main amplifier by a second delay unit by a second power synthesizer to offset said strain component, a monitor output is obtained by a directional coupler, and a unidirectional property is enhanced by an isolator to obtain a power synthesis output, wherein at least two or more of said power distributor, said first delay unit, said first power synthesizer, said second delay unit, said second power synthesizer, said directional coupler, said isolator, a terminating resistor of said second power synthesizer, and the terminating resistor of said directional coupler are unified. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- a strain detection circuit in which an input signal is distributed by a power distributor, and a signal obtained by amplifying one output by a main amplifier via a first variable attenuator and a first variable phase unit is synthesized with a signal obtained by adjusting a timing of another output distributed from said power distributor by a first delay unit by a first power synthesizer to detect a strain component generated in said main amplifier; and
Specification
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Current AssigneeHitachi Kokusai Electric Incorporated (Hitachi, Ltd.)
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Original AssigneeHitachi Kokusai Electric Incorporated (Hitachi, Ltd.)
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InventorsNagano, Terufumi, Himono, Masahiro, Uchida, Takashi, Sera, Yasuo
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Primary Examiner(s)Pascal, Robert
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Assistant Examiner(s)Nguyen, Patricia T.
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Application NumberUS09/727,780Publication NumberTime in Patent Office596 DaysField of Search330/151, 330/149, 333/109, 333/164, 333/156US Class Current330/151CPC Class CodesH03F 1/3229 using a loop for error extr...
