Figure 7.1. On the left is an AC generator, neither side is grounded. Two wires connect the generator to the two inputs of a differential amplifier on the right. In the middle is a generator with one side grounded. This generator is labeled noise. Two capacitors connect to the ungrounded side of the noise generator. One of the capacitors connects to one of the lines connecting the AC generator and the differential amplifier. The other capacitor connects to the other line. End verbal description.
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