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OTL Asylum OTL, Output Transformerless Amplifier User Group. |
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In Reply to: Re: lowering Zout, paralleling or feedback posted by martin poulin on October 23, 2004 at 19:05:30:
Hi, Martin -Positive current feedback basically measures the current through the load (usually by sensing the voltage across a low value resistor in series with the load) and typically adds this voltage, suitably scaled, to the input signal in some manner. One has to be a bit careful when employing positive current feedback, because too much will give the amplifier a negative output impedance characteristic which is not usually desirable and more yet may degrade amplifier transient response and risk large scale oscillations into loads that have low impedance minima.
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- Re: lowering Zout, paralleling or feedback - Tom Dawson 21:56:01 10/24/04 (0)
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