ADC12D040

SNAS171E – JUNE 2002 – REVISED MARCH 2013

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TOTAL HARMONIC DISTORTION (THD) is the ratio, expressed in dB, of the rms total of the first seven

harmonic levels at the output to the level of the fundamental at the output. THD is calculated as

where

•

f1 is the RMS power of the fundamental (output) frequency and f2 through f10 are the RMS power of the first 9

harmonic frequencies in the output spectrum.

(4)

– Second Harmonic Distortion (2ND HARM) is the difference expressed in dB, between the RMS power in the

input frequency at the output and the power in its 2nd harmonic level at the output.

– Third Harmonic Distortion (3RD HARM) is the difference, expressed in dB, between the RMS power in the

input frequency at the output and the power in its 3rd harmonic level at the output.

Timing Diagram

Figure 3. Output Timing

Transfer Characteristic

Figure 4. Transfer Characteristic

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