The most often requested video! In this tutorial Dave explains what Operational Amplifiers (OpAmps) are and how they work. The concepts of negative feedback, open loop gain, virtual grounds and opamp action. The comparator, the buffer, the inverting and non-inverting amplifiers, the differential amplifier, and the integrator circuit configurations are also explained.
Then a practical breadboard circuit to demonstrate a virtual ground and the effect of voltage rail limitations.
OpAmps Tutorial – What is an Operational Amplifier? - [Link]
Keithley 2460 Source Measure Unit (SMU) Review, Teardown and Experiments - [Link]
by w2aew @ youtube.com
The Vbe Multliplier circuit, also known as an Amplified Diode or Adjustable Diode, is a useful circuit that allows you to set a user desired voltage drop without using a series combination of diodes or zeners. This video describes and demonstrates how this circuit works, and shows a few applications where it is used. It is commonly used to set the bias on a low-impedance push-pull output stage of an amplifier. All transistors shows are typical general purpose devices like the 2N3904/2N3906. The scope is being used as a simple curve tracer in the first part of the video.
Basics of a Vbe Multiplier: what it is, how it works & where it is used - [Link]
Teardown, Repair and Analysis of an HP 8562B 22GHz Spectrum Analyzer - [Link]
Just a bit of fun…I try use an oscilloscope to measure / calculate the speed of sound. I also conduct a hearing test during the video.
Measuring the Speed of Sound with an Oscilloscope - [Link]
A look inside Flir’s Lepton thermal imaging sensor.
Flir Lepton extreme teardown - [Link]
What’s inside Keysight’s new 34470A 7 1/2 digit Truevolt bench multimeter?
What are the PCB changes from the 34461A?
What voltage reference does it use to get 16ppm nominal accuracy?
EEVblog #723 – Keysight 34470A 7.5 Digit Multimeter Teardown - [Link]
What’s inside a 2000 vintage Globalstar GSP1600 Tri-Band Satellite Phone? Behold the Erectile Antenna, a helical designed extending antenna.
EEVblog #721 – Globalstar Satellite Phone Teardown - [Link]