@lcamtuf I think I found another bug, one that's not already in the errata. On p. 118, you calculate the noise of a 10 kHz resistor on a 20 kHz spectrum. My calculation gives 0.129 sqrt(10 kOhm) sqrt(20 kHz) in nanovolts. Plugging in the numbers, I get 1.82 microvolts, not 1.3 as printed.