ML1490 amplifier equivalent, rf/if/audio amplifier wideband amplifier.
Vr. Diode D1 rectifies the positive peaks of Q1's output only when these peaks are greater than Vr ≈ 7.0 V . The resulting output is filtered by Cx, Rx. Rx controls the .
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Figure 5. Voltage Gain and Supply Current versus Supply Voltage (Video Amplifier, See Figure 20)
AV, SINGLE±.
OF SPEECH COMPRESSOR The amplifier drives the base of a PNP transistor operating common
–emitter with a voltage gain of approximately 20. The control R1 varies the quiescent Q point of this transistor so that varying amounts of signal .
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