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Old 25th February 2015, 02:43 PM   #1
waso is offline waso  Russian Federation
diyAudio Member
Join Date: Aug 2010
Location: Russia
Default Nataly eXPerience. Without compromise.

This is the last in the series of my amplifiers "Nataly" development today. It used all the useful insights that were used in previous versions and takes into account the nuances of correction. Used SuperA mode output stage, which can significantly reduce the distortion of higher order. The amplifier is equipped with a limiter, protection of the output stage, the signal compensation on the speaker wires.
The first stage of the amplifier performs the function of the doubling of the input voltage, and a peak limiter. The output of the operational amplifier is loaded on the buffer stage, preserving the work of the Operational Amplifier in class A.Main stage is inverting composite amplifier. Such a construction eliminates the common-mode voltage at the inputs of the Operational amplifier. In the summing point also receives the correction signals zero amplifier output from the integrator, double inverted voltage drop on the "ground" speaker wire for the virtual removal of the speaker wires from the system. The voltage amplifier has a gain of 5.1 kω\470 Ohm ) +1, it is protected from overload by output current when the protection operation.
The BIAS source is controlled dynamically, the control circuit the quiescent current support output transistors in active mode.
Peak limiter monitors emerging at the time limitation of output signal output voltage output OP4, decreases the gain of the first stage (OP1) and served a light signal to the user.
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Last edited by waso; 25th February 2015 at 03:48 PM.
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