Negative FeedbackAnalogue design's core trade: raw gain for accuracy and bandwidth.Electrical EngineeringNegative feedback trades open-loop gain foraccuracy, bandwidth and predictability.A_cl = A/(1 + Aβ) · A_cl → 1/β when Aβ is largeA = 100000, β = 0.01A_cl ≈ 100Set by β alone.Open-loop gain halvesA_cl moves 0.05%Desensitised.Gain × bandwidthStays constantLess gain, more band.THE COMMON MISTAKE✗ Assuming more feedback is always safer✓ Checking phase margin at the crossoverAccumulated phase lag turns negative feedback positive somewhere. If loopgain still exceeds one there, the circuit oscillates.Feedback cuts distortion generated inside the loop by roughly the loopgain. Noise arriving at the input is amplified with the signal.Negative Feedbacklearnposters.com
Negative Feedback — printable engineering wall chart from LearnPosters. Free vector PDF, US Letter and A4.

What’s on the Negative Feedback poster

The rule, 3 worked examples, and the mistake everyone makes.

Feedback cuts distortion generated inside the loop by roughly the loop gain. Noise arriving at the input is amplified with the signal.

Questions about the Negative Feedback poster

What’s on the Negative Feedback poster?
The rule, 3 worked examples, and the mistake everyone makes. Negative feedback trades open-loop gain for accuracy, bandwidth and predictability.; A_cl = A/(1 + Aβ) · A_cl → 1/β when Aβ is large; A = 100000, β = 0.01 = A_cl ≈ 100; Open-loop gain halves = A_cl moves 0.05%; Gain × bandwidth = Stays constant; Common mistake: Assuming more feedback is always safer → Checking phase margin at the…. Feedback cuts distortion generated inside the loop by roughly the loop gain. Noise arriving at the input is amplified with the signal.
Who is the Negative Feedback poster for?
Negative Feedback belongs to the Electrical Engineering section rather than to a school year, because engineering is not something one grade owns. Anyone learning electronics can pin it up — a beginner, a student mid-course, or someone revising years later.
When should you use the Negative Feedback poster?
Use it to see why closed-loop gain barely moves when the device parameters do. A wall chart earns its place by being glanceable from where the work is happening, so Negative Feedback belongs on the wall where that engineering work actually happens, within glancing distance, rather than filed away.
What other posters go with Negative Feedback?
Op-Amp Golden Rules, BJT Operating Regions and BJT vs MOSFET sit alongside Negative Feedback in the Electrical Engineering section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Op-Amp Golden RulesBJT Operating RegionsBJT vs MOSFET
Is the Negative Feedback poster free to download and print?
Yes. Negative Feedback downloads as a free PDF with no account, no email and no watermark, like everything else in the Electrical Engineering section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
What size does the Negative Feedback poster print at?
Negative Feedback is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Negative Feedback loses nothing.Printing guide

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