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电流反馈放大器（CFA）及其性能介绍（涉及OPA621）
消耗积分:5 |
格式:rar |
大小:118 |
2009-06-04
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Although current-feedback amplifiers (CFAs) have been in
use for quite some time, there is a reluctance to view them
in the same light as voltage-feedback amplifiers (VFAs). For
instance, the gain-bandwidth curve of VFAs has a parallel
in a transimpedance-bandwidth curve for CFAs. This parameter
can be used to determine the closed-loop behavior
of the CFA in the same way that GBW can for the VFA. Not
all the fault is with the users—the amplifier manufacturers
have not standardized the CFA characterization as they
have done with VFAs. This paper describes the CFA and its
behavior in an intuitive manner.
use for quite some time, there is a reluctance to view them
in the same light as voltage-feedback amplifiers (VFAs). For
instance, the gain-bandwidth curve of VFAs has a parallel
in a transimpedance-bandwidth curve for CFAs. This parameter
can be used to determine the closed-loop behavior
of the CFA in the same way that GBW can for the VFA. Not
all the fault is with the users—the amplifier manufacturers
have not standardized the CFA characterization as they
have done with VFAs. This paper describes the CFA and its
behavior in an intuitive manner.
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