Errata
Want your name “in print” (well, actually, on this page, last column)? Send us your erratum candidate!
(use the Contact tab)
Note: you can sort by page or by date, and you can download a pdf. Errata are corrected in successive printings, with approximate cutoff dates (through the 6th printing) of 10Apr15, 9July15, 23July15, and 7oct15; so you can scroll down a date-sorted list to find needed corrections.
| Page | Location | Description | Found By | Date |
|---|---|---|---|---|
| 19 | Fig 1.29 | change "10mA" to "1mA" | Luca Di Taranto | 20150416 |
| 24 | last line | change "50 mA" to "5 mA" (and change "1 ms" to "10 ms" in caption of Fig. 1.39) | Ivan Baldin | 20150411 |
| 26 | last line | put 1/C in front of integral, thus: V(t)=(1/C)∫Iin(t)dt | Kevin Kutz | 20160501 |
| 27 | Fig. 1.47 | 10% error at about 20% of Vin | Carlo del Noce | 20200426 |
| 29 | first line | change "2.54" to "0.394" | Richard Speir | 20150417 |
| 32 | Table 1.1 | VF=800mV for 1N4007 | Jacques | 20150412 |
| 37 | Fig 1.78 | the diodes should point in opposite directions | John Larkin | 20150330 |
| 40 | left column, line 11 | the "2π" is outside the square root: f=1/2π√LC | Alessandro Ruggiero | 20150726 |
| 43 | Fig 1.93 caption | change "lowpass" to "highpass" | Kevin Hughes | 20150414 |
| 43 | left column, lines 1 and 15 | change "√2" to "1/√2" | Johanns Ackermann | 20150524 |
| 45 | right column, line -15 | change "reactance of" to "impedance of" | J. Casey Marnocha | 20150731 |
| 47 | Fig 1.95 | prefix √2 to the amplitude (so V0 is the rms amplitude for calculations) | Adam Poertner | 20170530 |
| 48 | right column, last eq'n | change numerator "R1" to "R2" | Richard Holmes | 20150504 |
| 50 | Fig 1.104 | change "-20dB/octave" to "-20dB/decade" | Enrico Donà | 20150407 |
| 68 | right column, line -8 | change "and frequency." to "and phase." | Peter Long | 20150413 |
| 72 | top right column | change IE to IC | Joe Santos | 20150411 |
| 78 | Exercise 2.2 | change "0.63" to "0.76" and "63µs" to "76µs" | Vincent Fusco | 20150421 |
| 78 | Fig 2.12 | bottom waveform is "collector Q1, Q3" | Paul Sedlacek | 20150423 |
| 90 | left column, line 7 | missing Δ in denominator: ΔIout/ΔVin | Sebastian Uria | 20150604 |
| 99 | Fig 2.53C | R3 should be 6.8k | Anders Gregersen | 20150823 |
| 100 | Fig 2.57B | move lower current sink to emitter of input transistor | Anders Jellinggaard | 20150414 |
| 103 | right column, line 13 | common-mode gain is 0.55 | Rod Bhar | 20150922 |
| 104 | Fig 2.65 | change "2.5k" to "25k" | Vincent Fusco | 20150426 |
| 108 | right column, line 22-23 | change "50%" to "20%" (2 places) | Rod Bhar | 20171006 |
| 157 | right column, line 11 | missing Rs in denominator | Stuart Field | 20191210 |
| 168 | left column, line 4 | change ID to IC (twice in text, once in Fig 3.53 axis label) | Lorenzo Donati | 20150611 |
| 183 | Fig 3.84 | base divider current is 50uA; and to match gains in ckt A, use resistor string 10.0k, 3.48k, 1.00k, and 499 in ckt B | Alan Morris & Graham Keeth | 20150823, 20171206 |
| 186 | Fig 3.91 | omit bubbles on gate input | Vicente Badía | 20150530 |
| 194 | Fig 3.97 | interchange FETs, wired as complementary switches (as in Fig 3.90) | Eldar Khayrullin | 20170813 |
| 196 | right column, line 6 | change "Diss" to "Ciss" | Lorenzo Donati | 20150615 |
| 204 | left column, last sentence | replace with "This circuit can switch either polarity -- when ON, the series MOSFETs sum to 2RON (the body diodes conduct only during ON-OFF transitions, or at very high currents)." | Shane Trent | 20150501 |
| 211 | Fig 3.113 | a "Catch-22": Q1 acts only after the capacitor has largely discharged. Replacement circuit here | Robert Schöftner and Peter Horowitz | 20150427 |
| 216 | last paragraph | change sentence to "Happily, MOSFETs are less likely to suffer...," and add footnote: "Some newer fine-geometry types are susceptible, however; see IR App-note AN-1155." | Chris Jones | 20150306 |
| 219 | right column, line -7 | should be gm ∝ IC | Lorenzo Donati | 20150620 |
| 226 | Fig 4.7B | interchange “+” and “-” input symbols | Enrico Perera | 20150331 |
| 228 | Fig 4.11 | R1 in numerator should be R2 | Maksym Ganenko | 20150511 |
| 233 | Fig 4.21 | interchange “+” and “-” input symbols | Christian Zietz | 20150421 |
| 234 | left column, line -10 | ...so for equal resistor values the input current is... | Poul-Henning Kamp | 20150411 |
| 249 | Fig 4.50 | replace "C" in last eq'n with "R2" | Russ Kegley | 20150509 |
| 267 | left column, line 15 | change "V+" to "Vref" | Steffen Kirn | 20151001 |
| 270 | right column, line 6 | change "inverting" to "noninverting" | Peter Smith | 20200129 |
| 287 | Exercise 4.36 | interchange -10 and +10 in 3rd and 4th lines | Graham Keeth | 20180101 |
| 295 | right column, line 3 | change "50µA" to "50µV" | Maksym Ganenko | 20150526 |
| 296 | right column, line -8 | change 7mAh to 70mAh | Philipp Marek | 20150907 |
| 300 | right column, line 13 | change 22-220GΩ to 4.5-45GΩ | Karl Zeilhofer | 20151203 |
| 308 | right column, line -16 | change S=mfT to S=0.3mfT | lorenzo Donati | 20150720 |
| 336 | Fig 5.52 | vertical scale in bottom graph should be 10, 100, 1000 | Lorenzo Donati | 20150722 |
| 337 | left column, line 7 | Rs=1MΩ | Philipp Marek | 20150907 |
| 347 | right column, line -14 | change ±0.02mV to ±0.01mV, 62,500:1 to 250,000:1, and 96dB to 108dB | Lorenzo Donati | 20150725 |
| 350 | left column, line -4 | change 100mV to 10mV (and, in following lines, 10V → 1V and 100W → 10W) | Marc | 20151024 |
| 354 | right column, line -12 | change "200:1" to "20:1" | Carl Van Wormer | 20151227 |
| 356 | right column, line 2 | change "0-5V" to "0-4V" | Philipp Marek | 20150907 |
| 357 | Fig 5.77 | interchange "ref" and "sense" labels, and interchange “+” and “-” input symbols on lower op-amp | Ste Kulov and Maksym Ganenko | 20150413 |
| 367 | Fig 5.87 | Replacement circuit here | Lorenzo Donati | 20150731 |
| 368 | Fig 5.88A | interchange "+" and "-" symbols on U3 | Lorenzo Donati | 20150802 |
| 416 | Fig 6.42 | change feedback resistor to 2k, and output amplitude to 0.2Vin. Axis units are "2πfRC" (also for Fig 6.41) | Alex Haynes | 20150604 |
| 437 | Fig 7.20 | interchange “+” and “-” input symbols on both op-amps | Anders Jellinggaard | 20150510 |
| 456 | Fig. 7.50 | correct waveforms divide by 4 (not 2); replacement figure here | Richard Pickvance | 20181125 |
| 466 | Fig 7.63 | capacitor on one-shot T2 should be 100nF | Lorenzo Donati | 20150809 |
| 474 | eq'n 8.3 | second term needs R in denominator | Philipp Marek | 20150907 |
| 478 | left column, lin -12 | eq'n should read: vn2=∫|en(f)H(f)|2df | Lorenzo Donati | 20150811 |
| 480 | eq'n 8.14 | denominator in argument of log should be: 4kTRsB | Ádám Hollós | 20190122 |
| 485 | eq'n 8.24 | coefficient of last term should read: 2q(IC/β0)r2bb' | Jian Zheng | 20160704 |
| 486 | Fig 8.19 | increase Cin to 4.7μF (to shunt the bias divider's noise) | Pol Welter | 20200620 |
| 506 | Fig 8.42, top | RE should be 22Ω | Maksym Ganenko | 20150703 |
| 509 | left column, lines -4 and -6 | gm should be in denominator | David Tranah | 20151006 |
| 513 | Fig. 8.49 | add 1uF bypass between output and com of LT6654 (req'd for stability) | David Crossan | 20160727 |
| 545 | Fig 8.80A | pnp is ZTX550 | Mikko Syrjälahti | 20150410 |
| 569 | left column, line 11 in section 8.13.6 | omit R on lefthand side of eq'n | Maksym Ganenko | 20150725 |
| 576 | second equation | the entire equation should have a factor 1/2 in front | Alexander Nuemeier | 20200907 |
| 600 | Fig 9.5 | output label should be "+5V, 2A" | MaWin | 20150423 |
| 608 | Fig 9.15 | change A1 to TLE2141 (operates to neg rail) | Amir Yazdani | 20170309 |
| 623 | Fig 9.39B | interchange op-amp's “+” and “-” input symbols | Enrico Perera | 20150808 |
| 629 | right column, line 5 | change "with neutral" to "with ground" | Andreas Sundstrom | 20150531 |
| 639 | Fig 9.59 caption | last word: change "Vout" to "Vin" | Mark Ferrari | 20150419 |
| 646 | Fig 9.65 | output label should be “+3.3V, 5A” and R2 should be 1.74k | Kevin McMurtrie and Maksym Ganenko | 20150403 and 20150803 |
| 648 | Eq'n 9.5 | in eq'n 9.5g change D/(1-D) to 1/(1-D), and in eq'n 9.5h change T/2L to T/2 | Mark Ferrari | 20150430 |
| 666 | right column, line -5 | N2 should be in denominator | Maksym Ganenko | 20150813 |
| 670 | eq'n in left column, line -16 | current should be squared | Chip Coldwell | 20180517 |
| 696 | Fig 9.110 caption | change Q2 to Q1 | Allan Herriman | 20151204 |
| 703 | left column, line -6 | change "DCAs" to "DACs" | Thorsten Johannvorderbrüggen | 20150407 |
| 713 | Fig 10.20 | remove bubble on gate's output | Lorenzo Donati | 20150523 |
| 722 | Table 10.4 | 3rd from bottom should read A+A'B=A+B | Lorenzo Donati | 20150525 |
| 723 | Fig 10.34 | gate at output should be OR (i.e., omit bubble) | Tyler Manning | 20150723 |
| 725 | Fig 10.38 | interchange A and B labels on lefthand figure | Lorenzo Donati | 20150525 |
| 737 | Fig 10.70 and code above | add inverter from QA to DA, and insert linebreak after QA.q in second line of ABEL code | Sebastian Wangnick | 20150505 |
| 738 | Fig 10.72B | move falling edge of D to the right by a half cycle of the input clock | Sebastian Wangnick | 20150505 |
| 740 | Fig 10.74 | R3 should be 33Ω | Joe Savio | 20160903 |
| 741 | Fig 10.78 | replace last 11 lines with this | Sebastian Wangnick | 20150505 |
| 778 | Fig 11.13 | enclose the pair of lines after the last "else" with "begin...end" | Lothar Haungs | 20150630 |
| 816 | Fig 12.38 | Time axis for bottom pair should be 0 to 4µs | Javier Alberola | 20150925 |
| 818 | Fig 12.39F | corrected mini-table here | Michael Weilguni | 20150529 |
| 824 | left column, lines 15-19 and 28-30 | circuit A discussion: replace lines 15-19 with this: "Taking the higher value, and using the datasheet's RON=200mΩ at 25°C, we've got I2RON=20W dissipation in Q2 (rising to 30W at 100°C), not a happy situation for a transistor that's ordinarily dissipating less than 2W." Circuit B discussion: replace lines 28-30 with this: "The bad news: it makes things worse for Q2, whose dissipation rises to IlimVin=120W." | Roland Clarke | 20151129 |
| 846 | Fig 12.86B, (and page 845) | H11L1 and H11N1 belong in group A (open collector) | Clemens Ladisch | 20150407 |
| 852 | Fig. 12.94C | bridge rect: reverse top right and lower left diodes | Peter Smith | 20190918 |
| 883 | Fig 13.4 | bottom resistor is 20k | Daniel Niessen | 20150413 |
| 885 | Fig 13.8B | interchange op-amp's “+” and “-” input symbols | Andrew Baker | 20150919 |
| 962-63 | §13.13.4B | in Fig 13.99, change R3 to 3.6M (also next page, bottom left column) and R4 to 330k; in the loop-gain eq'n change 2.26x105 to 3.77x105; in the gain calculation box the VCO voltage range is 1V to 4V, so KVCO is 60kHz/volt or 3.77x105rad/sec-volt | Federico Sangiuliano | 20151113 |
| 1007 | Program 14.5 | several bugs, corrected program here | Phillip Marek and Alan Stern | 20151110 and 20151119 |
| 1039 | Fig 14.45 caption | horizontal scale is 100µs/div | Casey Nordgran | 20150428 |
| 1047 | Fig 14.51 | int 64: highest bit is -263 quad binary 128: lowest bit is 2-112 | Phillip Marek | 20151110 |
| 1056 | suntan monitor | add 25ms delay (RC settle) before reading "bake" setting | Phillip Marek | 20151110 |
| 1057 | pseudocode listing, line 5 | second "PD1" should be "PD0" | João-Nuno Carvalho | 20150425 |
| 1058 | Program 15.1 | replace 2 instances of "PORTD = BUZZER" with "PORTD &= ~BUZZER" | Matt Keeter | 20160520 |
| 1065 | pseudocode listing, line -5 | if mode=remote | Phillip Marek | 20151110 |
| 1075 | pseudocode 15.4 listing | change "Pint" to "I" (2 places) | Peter Morvay | 20150614 |