Here's two transistor circuits that look and function very much like tube amp circuits. The first is the transistor common emitter amplifier:Tube triode amp circuit on the left, transistor common emitter amp on the right. Remove transistor resistor R2 and this circuit looks just like a tube ...
The basic concept of an amplifier: A smaller current is used to modify a larger current. In the last section, we saw that an amplifier's job is to take a weak audio signal and boost it to generate a signal that is powerful enough to drive a speaker. This is an accurate description w...
A BJT is one of the most common types of transistors and can be either NPN or PNP. This means a BJT consists of three terminals: the emitter, the base and the collector. By joining these three layers, a BJT can amplify an electrical signal and switch the current on and off. Two kind...
How is the working of a power station generator connected to electromagnets? Explain the working of the Common Emitter Amplifier. Could someone explain to me about how live, earth and neutral wires work? Why does a lightbulb go out when you close the switch in a circuit. What is the purpos...
Linear-amplifier output stages are directly connected to the speaker (in some cases via capacitors). If bipolar junction transistors (BJTs) are used in the output stage, they generally operate in the linear mode, with large collector-emitter voltages. The output stage could also be implemented ...
Because the VCOM voltage of every display is set individually during production, a nonzero collector-emitter saturation voltage does not have an important effect on the circuit performance. During production of the display, if the VCE(sat) of a transistor is different from the nominal value, the...
This electronics video tutorial provides a basic introduction into the common emitter amplifier which uses a NPN bipolar junction transistor. This video explains how to calculate the voltage gain, current gain, and power gain of the CE amplifier circuit. ...
Think of a common-emitter or common-source amplifier with an active load. Over the operating range of the amplifier, its load approximates a constant current source. If it didn't the usable swing of the amplifier (for a given distortion specification) would be ludicrously small. The si...
I used a 3-pin connector for my regulator board, because I wanted it to be removable.You don't have to, but it does make things easier. See above note about capacitors. TESTING THE BOARD You can finally test your NES! Solder the output pin on your regulator (+5v out) to the 5v ...
To turn on the top N-channel MOSFET, the gate must be taken at least 3v higher than the source because it is a SOURCE FOLLOWER (similar to an EMITTER FOLLOWER). This is equal to Vin + 3v. How does pin HG get this high voltage?