Latest Blog Posts for Circuits, Schematics, Hobby kits, Electronics design, Electronic Circuits

• Integrator schematic with explanation
  on Oct 2, 2013 in Integrator
  If you replace the feedback resistor with a capacitor, you get an integrating amplifier. In math, an integration operation is basically the area under a curve. If we have a voltage vs time graph, and the voltage remains constant, the integral of t...
• Summing Amplifier schematic with explanation
  on Oct 2, 2013 in Summing Amplifier
  Let's go back to the inverting amplifier. In its original form, we had one input resistance, one feedback resistance and one input voltage; but what happens if we have two or more inputs? The math goes like this:     Vrin1 = Vin1 - Vinv The inv...
• Opamp Configurations,Difference Amplifier schematic with explanation
  on Oct 2, 2013 in Difference Amplifier
  So far you've learned about how to make an opamp add an inverted (negative) voltage to a reference, & to add a positive voltage by setting the reference. Since the opamp has two inputs, one inverting & one non inverting, it should be poss...
• The non inverting amplifier schematic with explanation
  on Oct 2, 2013 in Non inverting amplifier
  For a non inverting action, a simple way to obtain it is to keep the feedback loop in place and connecting the terminal where the input used to be connected, to ground, while feeding the input signal to the non inverting input. This makes the opa...
• Inverting amplifier schematic with explanation
  on Oct 2, 2013 in Inverting amplifier
  As you leaned in the intro to opamps, when under negative feedback, the voltage difference across its inputs will be close to 0v. This is achieved via compensation from the opamp output & the feedback loop. In the simplest way to achieve it is...
• Negative Feedback schematic with explanation
  on Oct 2, 2013 in Negative Feedbac
  Opamps have a very high intrinsic gain, something in the order of 150,000 & higher; this is called the open loop gain. This gain is not very useful by itself since it is very unstable; it changes with temperature, supply voltage & also req...
• The Operational Amplifier OprAmp schematic with explanation
  on Oct 2, 2013 in Operational Amplifier
  The operational amplifier is perhaps the most versatile of amplifier circuits, used many different applications as a gain component due to high stability, gain & input impedance, as well as the fact that very little external components are nee...
• CMOS: Complementary MOSFET schematic with explanation
  on Oct 2, 2013 in Complementary MOSFET
  Let's do a quick review of MOSFET operation. An P type MOSFET in depletion mode, apply a positive voltage enough to create a wide neutral zone and it turns off by the action of holes at the base drawing electrons to it. An N type MOSFET in deplet...
• Metal Oxide Semiconductor Field Effect Transistor
  on Oct 2, 2013 in Field Effect Transistor
  Sometimes, even that small amount of current is too much, so a new FET design came into being. The Insulated Gate FET (IGFET) is another type of field effect transistor. This time, the P material is completely dumped & replaced by a metal cont...
• Junction FET operation (JFET) Schematic with explanation
  on Oct 2, 2013 in JFET
  Junction FETs work with the diode junction in reverse bias, that is, a more positive voltage is applied to the cathode instead of the anode, the cathode being the gate terminal. When a gate voltage is applied, the junction depletion region widens...

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