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Representative schematic of a current-feedback op-amp or amplifier. The current-feedback operational amplifier ( CFOA or CFA ) is a type of electronic amplifier whose inverting input is sensitive to current , rather than to voltage as in a conventional voltage-feedback operational amplifier (VFA).
This image is a derivative work of the following images: File:Block_diagram_for_feedback.PNG licensed with Cc-by-sa-3.0,2.5,2.0,1.0, GFDL . 2008-02-03T01:24:43Z Brews ohare 702x283 (23414 Bytes) {{Information |Description=Block diagram for single-loop feedback amplifier |Source=Own work |Date=02/02/08 |Author=Brews_ohare |Permission=Public domain |other_versions=None }} [[Category:Electrical ...
Block diagram of the CDBA. A current differencing buffered amplifier (CDBA) is a multi-terminal active component with two inputs and two outputs and developed by Cevdet Acar and Serdar Özoğuz. Its block diagram can be seen from the figure. It is derived from the current feedback amplifier (CFA).
A block diagram of an electronic amplifier with feedback. A block diagram of an electronic amplifier with negative feedback is shown at right. The input signal is applied to the amplifier with open-loop gain A and amplified. The output of the amplifier is applied to a feedback network with gain β, and subtracted from the input to the amplifier ...
The feedback amplifier consists of a main open-loop amplifier of gain A OL and a feedback loop governed by a feedback factor β. This feedback amplifier is analyzed to determine how its step response depends upon the time constants governing the response of the main amplifier, and upon the amount of feedback used. A negative-feedback amplifier ...
This amplifier is often referred to as a shunt-series feedback amplifier, and analyzed on the basis that resistor R 2 is in series with the output and samples output current, while R f is in shunt (parallel) with the input and subtracts from the input current. See the article on negative feedback amplifier and references by Meyer or Sedra. [8 ...
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Common-emitter amplifiers give the amplifier an inverted output and can have a very high gain that may vary widely from one transistor to the next. The gain is a strong function of both temperature and bias current, and so the actual gain is somewhat unpredictable.