Non-Ideal Characteristics. Input impedance Output impedance Frequency response Slew rate Saturation Bias current Offset voltage. Input and Output Impedances. Ideal model assumes: R IN is infinite R OUT is zero In real life: R IN > 1 M W R OUT < 100 W. Input Impedance.
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We know that A0 >> 1 and that ROUT is either small or comparable with R1 and R2.
Typically, ROUT appears to be reduced by several orders of magnitude.
Ideally, gain = 10
Constant, K, depends on the op-amp. For a 741 it is around 2p´106.
i.e. A first order low-pass filter, cut-off frequency of 100 kHz.
If the amplitude of the sine wave output is just below the saturation level, the maximum frequency that an undistorted SINE WAVE output can be obtained is often known as the full power bandwidth.
E.g. 741 with saturation levels of ±13.5 V:
NB. More about saturation next time…