However, in a real-world VFB, the open loop gain is large at dc, but rolls off at 6 dB/octave . As open-loop gain decreases, the negative-feedback op amp’s gain drops below the ratio R F /R I .

Where A OL is equal to the amplifier’s open-loop-gain in dB: V OUT is the output voltage of the amplifier V OS is the measured operational amplifier offset voltage. In this case, it is important to ...

The open-loop output impedance is about 30W, made obvious by the flat region of the gain-of-100 curve at high frequencies. In this region, from about gain-bandwidth-frequency/100 to ...

Operating at 12V and delivering 5W from a 600mVp-p input, TI is claiming a 28dB improvement in THD+N at 100Hz compared with an open-loop Class-D designs. “You have to be careful with specifications ...