General Purpose Preamp

This amplifier is useful for audio and video applications. Gain is set by Rf and the voltage gain of this amplifier is approximately 1+Rf/560, where Rf is in ohms. Bandwidth depends on gain selected, but typically it is several MHz. Rf=5.1 kW, which produces a gain of 10*(20dB) voltage.
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General Purpose Preamp - Circuitos de Electronica