Posts by Circuit fantasist
For many years I have been working on unraveling the basic ideas behind famous circuit solutions. Thus I gradually managed to accumulate a collection of circuit principles and clever tricks. I have...
Another hardware solution There is another hardware debouncing technique widely used in the past. It is implemented by an SPDT push button driving (buffered by) an RS latch. (ganssle.com) This con...
In addition to the previous considerations, I will add a few more. Stages with voltage output (such as a voltage follower) are implemented as voltage dividers consisting of two elements in series "...
... it is still unclear to me how to determine the voltage drop introduced by these transistors... Very interesting question... I have asked myself many times in the past... and I have not bee...
Here is another "functional explanation" of this phenomenon (see also my RG question). General feature. Unlike resistors that directly decrease current, both capacitors and inductors do it by subt...
With the capacitor C3 disconnected, the stage has a minimum gain and with C3 connected it has a maximum gain. There is a compromise solution with a moderate gain - to connect a resistor in series t...
Your circuit will make sense if you do two things: significantly increase both R3 and R4 reverse D1 or move it to Q1's base Let's first see the role of the resistances R3 and R4. These are ...
Although the voltage drop across the current-sensing resistor R6 is floating and it can "move" between the 28 V rails, the A1A op-amp input voltages can (have to) vary within the 5 V power supply. ...
Both differential amplifier and differentiator react to a voltage difference. But in the differential amplifier, the difference is between two voltages applied to the amp inputs at the same time wh...
Setup We can best understand the behavior of the tunnel diode in the region with negative resistance if we imagine it as a self-variable (dynamic) resistor R driven by a variable voltage source V ...
My Comment I will begin my answer by commenting on the other two answers from two months ago. I will show that they do not contradict but rather complement each other. Ideal current sources. I ca...
I fully agree with OP considerations about measuring the transistor output curve. We can very easily and precisely set successive current values with constant increment. Thus, the IV curves will be...
Figuratively speaking, Olin Lathrop's answer is a wonderful story about the unequal "tug of war" between a "pulling up" resistor and "pulling down" switch. And, when the switch is 'off', the "strug...
Load line Formal "explanation" In common emitter collector we just draw a line from the vertical axis (Ic) at the point (0,VCC/RC) to the horizontal axis at the point(VCC,0) and where that line...
