Blogs listed below are grouped by a few general topics. Some may be listed in more than one category. Follow-ups are indented under the initial topic.
A sequential listing of the most recent blogs is here... The Signal
Op Amp Characteristics, Behaviors
Op Amp Voltage Ranges—input and output, clearing some confusion
Rail-to-Rail Inputs—what you should know!
Internal Input Bias Current Cancellation of bipolar (BJT) op amps
Input Bias Current Cancelation Resistors—do you really need them?
Input Bias Current of CMOS and JFET Amplifiers
Temperature Effects on Input Bias Current… plus a Random Quiz
Op Amp Noise—the non-inverting amplifier
Op Amp Noise—but what about the feedback? noise contribution of feedback resistors
1/f Noise—the flickering candle
Chopper Op Amps—are they really noisy?
Input Capacitance—common-mode?...differential?… huh?
Matchy Matchy—how alike are dual op amps?
Swinging Close to Ground—single supply operation
Why Op Amps Oscillate—an intuitive look at two frequent causes
Taming the Oscillating Op Amp
Taming Oscillations—the capacitive load problem
Slew Rate—the op amp speed limit
Settling Time a look at the character of the settling waveform
Bypass Capacitors… yes, but why?
Op Amps… G=1 stable & decompensated
The Inverting Attenuator, G = -0.1… is it unstable?
Protecting Inputs from Damage— EOS protecting from input over-voltage
ESD… Zapp! protecting circuits and systems from damage and functional failures
The Unused Op Amp—what to do? how to connect unused op amps
“I Need High Input Impedance!” input impedance vs. input bias current
“Typical”—what does it mean in a data sheet specification?
Differential Input Clamps-- can they affect your op amp circuits?
Offset Voltage and Open-Loop Gain—they’re cousins
Op Amps used as Comparators—is it okay?
Where are the Trim Pins? some background on offset voltage trim pins
Instrumentation Amps and Difference Amps
Instrumentation Amplifiers—avoiding a common pitfall providing a path for input bias current
Difference Amplifiers—the need for well-matched resistors
Making Your Own Difference Amp—sometimes 1% resistors are good enough
SPICE and simulation issues
SPICE It Up! … but does Bob Pease say no? is SPICE a crutch or a tool?
SPICEing Op Amp Stability using SPICE to check stability of op amp circuits
SPICEing Offset Voltage how to check the sensitivity of circuits to offset voltage
Simulating Gain-Bandwidth—the generic op amp model
Power Supply Bypassing—SPICE Simulations vs. Reality
Application Circuits and Issues
Grounding Principles... techniques for proper grounding and bypassing of amplifiers
Bypass Capacitors… yes, but why? insight on the why of supply bypassing
Handy Gadgets and Resistor Divider Calculations, includes an Excel spreadsheet for offset voltage dividers
Put Gain Up Front—waxing philosophical
ESD… Zapp! protection of boards and systems from ESD
Resistor Noise—reviewing basics, plus a Fun Quiz
PCB Layout Tricks—striped capacitors and more
Protecting Inputs from Damage— EOS
Current Sources (and sinks)—understanding compliance range
TIA Input Z: Infinite… or Zero? What is it, really? transimpedance amplifier input Z
Comparators—what’s all the chatter?
Paralleling Op Amps—is it possible?
Thermocouples—stuff that every analog designer should know
Illuminating Photodiodes ;-) the basics of photodiodes
When Potentiometers go to Pot using pots in ratiometric mode
Controlling Volume—log pots volume controls
Pop Quiz! A 20-question quiz on previous blog topics. I dare you!
Brain Teaser... an infinite resistor network
Brain Teaser —the solution
Resistor Puzzle—the sequel
Resistor Puzzle Solution... and a rant on schematics
Breadboarding with Micro-Packages—Ouch!
Handy Gadgets and Resistor Divider Calculations a cool Excel worksheet attached
Excel Cell formula for 1% resistors bonus material at the end of this blog
Goop—a sticky topic one of the most popular blogs
Honoring an Analog Giant Bob Pease
Interview Questions—memorable times on both sides
Oh, That Interview Question— a reprise
“The Signal” travels to EDN
I Like Change… except when it happens! (changes to our blogs)
Knowing Where to Tap A goodbye from Bruce and urging on knowledge-sharing and mentoring.
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