Wideband variable gain amplifier with low phase variation낮은 위상 변화를 갖는 광대역 가변 이득 증폭기

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A wideband variable gain amplifier (VGA) having a low phase change is disclosed. The first VGA amplifies an input signal by a current steering manner so that an amplification gain is variable. The larger a variable gain amount of the first output signal amplified by the first VGA is, the more a relative phase change amount gradually increases in either positive direction or negative direction. The second VGA further amplifies the first amplified output signal in the current steering manner so as to vary the amplification gain. As a variable gain amount of a second output signal amplified by the second VGA becomes larger, a relative phase change amount gradually increases in a direction opposite to the phase change direction of the first VGA. This opposing phase changes of the first and second VGAs are canceled against each other to provide a variable amplification gain over the wideband frequency range with a low phase change.
Assignee
KAIST
Country
US (United States)
Application Date
2018-12-11
Application Number
16215864
Registration Date
2020-06-30
Registration Number
10700656
URI
http://hdl.handle.net/10203/275438
Appears in Collection
EE-Patent(특허)
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