Specifications

Output Stage Biasing www.ti.com
Figure 12. 250mA Bias Current Output FFT
A correctly biased time domain distortion residual is represented above by an FFT that exhibits fairly
evenly balanced amplitudes of even and odd harmonics as they decrease over frequency. Most of the
distortion products are below the fundamental or test signal of 1kHz.
Figure 13. 1A Bias Current Distortion Residual
A high bias (Class A) output stage shows no crossover distortion and a very flat time domain distortion
residual.
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AN-1850 LME49830TB Ultra-High Fidelity High-Power Amplifier Reference SNAA058B–July 2008–Revised May 2013
Design
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