Question 30.20: Repeat Ex. 30.19 if the op-amps used have open-loop gains of......
Repeat Ex. 30.19 if the op-amps used have open-loop gains of 1,000.
Step-by-Step
The simulation results are shown in Fig. 30.61. The error has increased by a factor greater than 10. As indicated earlier in Eq. (30.39), the minimum op-amp open-loop gain is set by the resolution of the data converter. If we were designing a 14-bit ADC, the op-amp used would require open-loop gains greater than 2^{16} or 64k (96 dB).
\left|A_{O L D C}\right|\geq2^{N+2} (30.39)
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