opamps - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-07-28T19:15:03+00:00

Op-amps ---------- Op-amp Information * * * Bandwidth Measurement Measuring the bandwidth of an operational amplifier (op-amp) means determining the frequency range over which it can amplify signals accurately. Bandwidth is typically defined as the f…

inductance

oscar (oscar@undisclosed.example.com) — 2026-06-21T08:22:30+00:00

Inductance High vs. Low Permeability Core Comparison Feature High Permeability (μ) Low Permeability (μ) Inductance per turn High Low Saturation Current (I_sat) Low (saturates easily) High (resists saturation) Knee Sharp and abrupt Gradual and soft

saturationscope.jpg - created

oscar (oscar@undisclosed.example.com) — 2026-06-21T08:11:05+00:00

electronics

oscar (oscar@undisclosed.example.com) — 2026-06-21T08:04:27+00:00

---------- Basic Equations * Voltage Equations * Inductance Measuring * Measuring Inductance * Measuring Small Resistance * Characteristic Cable Impedance AC Power Supply Circuit * Rectifier Circuit Transistors * Common Emitter Theory * Transistor Bias * Common Emitter Calculation 1 * Common Emitter Calculation 2 Transfer Functions * *

characteristic-cable-impedance - created

oscar (oscar@undisclosed.example.com) — 2026-06-02T15:22:25+00:00

Characteristic Cable Impedance Method 1: Measure C and L of a known cable length For a transmission line: Z0 = SQRT( L' / C' ) where: L' = inductance per meter (H/m) C' = capacitance per meter (F/m) Step 1: Measure capacitance Take a known cable length l. Leave the far end open-circuit. Measure the capacitance between center conductor and shield:

logarithm-db

oscar (oscar@undisclosed.example.com) — 2026-05-16T17:34:51+00:00

Logarithm Scale & dB ---------- Octave & Decade A logarithmic scale uses decades (factors of 10) or octaves (factors of 2) to represent vast ranges of data, such as frequency, on a compact graph. Decades, useful for spanning magnitudes (10, 100, 1000 Hz), represent a 10:1 ratio, while octaves (doubling) are common in audio.

opamps - [Op-amp Topics]

oscar (oscar@undisclosed.example.com) — 2026-05-15T12:21:50+00:00

Op-amps ---------- Op-amp Topics * Opamp Measurements * Opamp Stability * Feedback capacitors Op-amp Links * * *

opamp-feedback

oscar (oscar@undisclosed.example.com) — 2026-05-15T12:21:09+00:00

Feedback Capacitors ---------- Purpose Purposes for adding capacitor in the feedback loop of opamps: Improve stability: Real op-amps are not ideal. An op-amp already contains internal poles and phase shift. External components (wiring capacitance, probe capacitance, transistor gates, ADC inputs, photodiodes, etc.) add even more phase shift. Too much phase shift in the feedback loop can turn negative feedback into positive feedback at high frequency → oscillation. The capacitor helps by redu…

opamps-stability

oscar (oscar@undisclosed.example.com) — 2026-05-15T11:58:09+00:00

Op-amp Stability ---------- Op-amp Stability Links * * * * …

opamp-measurement

oscar (oscar@undisclosed.example.com) — 2026-05-15T11:57:26+00:00

Op-amps Measurement ---------- Bandwidth Measurement Measuring the bandwidth of an operational amplifier (op-amp) means determining the frequency range over which it can amplify signals accurately. Bandwidth is typically defined as the frequency at which the gain drops by 3 dB compared to its low-frequency value. There are two closely related bandwidth concepts:

sidebar

oscar (oscar@undisclosed.example.com) — 2026-05-15T11:52:21+00:00

Contents Linux * Linux System * Debian specific * Home Server * Applications * Systems & Peripherals Computing * Networking Topics * Windows Topics * Git * Regex * MOTD text to ascii Raspberry * raspberry-cross-platform * raspberry-sd * raspberry-gpio * Domotica ESP Development * ESP8266 * ESP32 Electronics * Various Subjects * Logarithm Scale & dB * Op-amps * LTSpice Android * adb-tools * OnePlus 6T Other * Heating * Audio Topics * …

cmrr2.png - created

oscar (oscar@undisclosed.example.com) — 2026-05-05T15:17:07+00:00

cmrr1.png - created

oscar (oscar@undisclosed.example.com) — 2026-05-05T15:17:07+00:00

ltspice-loop-measure.jpg - created

oscar (oscar@undisclosed.example.com) — 2026-05-04T16:41:25+00:00

log-formulas.jpg - created

oscar (oscar@undisclosed.example.com) — 2026-05-04T15:05:44+00:00

git-combine-merge-before.svg - created