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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).
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).
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 ...
A unity gain buffer amplifier may be constructed by applying a full series negative feedback (Fig. 2) to an op-amp simply by connecting its output to its inverting input, and connecting the signal source to the non-inverting input (Fig. 3). Unity gain here implies a voltage gain of one (i.e. 0 dB), but significant current gain is expected. In ...
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 op-amp non-inverting amplifier is a typical circuit with series negative feedback based on the Miller theorem, where the op-amp differential input impedance is apparently increased to infinity Infinite impedance uses a non-inverting amplifier with A v = 1 {\displaystyle A_{v}=1} .
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The Norton amplifier can be regarded as the dual of the operational transconductance amplifier (OTA) which takes a differential voltage input and provides a high impedance current output. The OTA has a gain measured in units of transconductance ( siemens ) whereas the Norton amplifier has a gain measured in units of transimpedance ( ohms ).