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## Basic Circuit Building Principles of the Week     Current Principle

Every week I add here a little description of a basic circuit principle (every, even the most elementary circuit, is based on a simple basic idea). I number and date these ideas consecutively as they have appeared in my mind; then, I arrange the principles systematically of circuit evolution - passive > transistor > op-amp etc.

In order to know more about the basic idea described, copy the principle name from the table below, paste it in the subject field, add additional questions in the message body and e-mail me. Your e-mail will not be automatically answered; I will prepare every e-mail answer especially for you revealing the basic circuit idea behind the circuit in a catchy and exciting manner. Thus you will get unusual and original explanations of the circuit operation that you have never seen before!

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Number/Week Subject Circuit Principles/Devices
Basic Principles for Building Passive Circuit

Principle 1

September 27, 2004

Obtaining Current Obtaining a current by applying a voltage across a resistor.
Voltage-to-Current Converter

Principle 2

October 04, 2004

Obtaining Constant Current Obtaining a constant current by depreciating a voltage across the load.
Simple Current Source

Principle 3

October 11, 2004

Current Regulating Regulating a current by a resistance.
Resistance-to-Current Converter

Principle 4

October 18, 2004

Obtaining Voltage Obtaining a voltage by passing a current through a resistor.
Current-to-Voltage Converter

Principle 5

October 25, 2004

Voltage Regulating Regulating a voltage by a resistance.
Resistance-to-Voltage Converter

Principle 6

November 01, 2004

Voltage Attenuating Attenuating a voltage by taking a partial voltage drop across a part of resistor.
Voltage Divider

Principle 7

November 08, 2004

DC Potential Shifting Moving a DC voltage by a resistor connected in series with the input voltage source and supplied by a current source.
Shifting Stage

Principle 8

November 15, 2004

Series Voltage Summing Summing/subtracting voltages by connecting the input voltage sources in series.
Series Voltage Summer/Subtracter

Principle 9

November 22, 2004

Parallel Current Summing Summing/subtracting currents by connecting the input current sources in parallel.
Parallel Current Summer/Subtracter

Principle 10

November 29, 2004

Parallel Voltage Summing Summing/subtracting voltages by preconverting the input voltages into currents.
Parallel Voltage Summer/Subtracter

Principle 11

December 06, 2004

AC Voltage Stiffening AC voltage stiffening by parallel capacitor connecting.
Bypass (Shunt) Capacitor

Principle 12

December 13, 2004

AC Voltage Shifting AC voltage shifting by series capacitor connecting.
Blocking (Decoupling) Capacitor

Principle 13

December 20, 2004

AC Voltage Decoupling AC voltage decoupling by series inductor connecting.
Inductive Filter

Principle 14

December 27, 2004

Pulse Shortening Pulse shortening by series capacitor connecting.
CR Differentiator

Principle 15

January 03, 2005

Reversing Voltage DC voltage reversing by differentiating.
CR Differentiator, LR Differentiator

Principle 16

January 10, 2005

Slowly Charging, Quickly Discharging Slowly charging, quickly discharging.
Flash Light

Basic Principles for Building Solid-State Circuits

Principle 17

January 17, 2005

DC Voltage Decoupling Voltage decoupling by series diode connecting.
Decoupling Diodes, Diode Logic Circuits

Principle 18

January 24, 2005

Current Rectifying Current rectifying by series diode connecting.
Diode Rectifier, Reverse-Polarity Protector

Principle 19

January 31, 2005

Series Voltage Limiting Voltage limiting by series diode connecting.
Series Diode Limiters

Principle 20

February 07, 2005

Parallel Voltage Limiting Voltage limiting by parallel diode connecting.
Parallel Diode Limiters, Overvoltage Protectors

Principle 21

February 14, 2005

Peak Detection Charging a capacitor to the maximal/minimal value
Peak Detector

Principle 22

February 21, 2005

DC Restoration Automatic voltage shifting of an AC signal with the peak value.
DC Restoration Circuit (Diode Clamp)

Principle 23

February 28, 2005

DC Voltage Stiffening DC voltage stiffening by parallel (zener) diode connecting.
Voltage Regulator
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Last updated February 27, 2005