The goal of a good amplifier is to cause as little distortion as possible. The final signal driving the speakers should mimic the original input signal as closely as possible, even though it has been boosted several times. This basic approach can be used to amplify all kinds of things, not...
a transistor transforms a small inputcurrentinto a bigger output current. As a switch, it can be in one of two distinct states -- on or off -- to control the flow of electronic signals through an electrical circuit or electronic device. ...
10. THE TRANSISTOR CAN ACT LIKE A SWITCH (OR LIKE A PARTIALLY-ON SWITCH.) 11. CONNECT A POWER SUPPLY OR BATTERY FROM COLLECTOR TO EMITTER IN ORDER TO CREATE A BIG FLOW OF CHARGE (BUT WHY?) 12. THERE'S ANOTHER DEPLETION ZONE BETWEEN COLLECTOR AND BASE. ...
A bipolar transistor is a semiconductor device consisting of three areas either P-type or N-type - an area of one type is sandwiched between areas of the other. The transistor fundamentally amplifies current but it can be connected in circuits designed to amplify voltage or ...
Therefore you need to add a transistor to amplify the current that flows through the CdS cell. A typical circuit might look like this: Base Emitter Collector If a small amount of current flows from emitter to base, then a large amount of current can flow from emitter to collector. In ...
There is a connection between the sizes of the two currents. This is called thegainof the transistor. For a general-purpose transistor, such as the BC547 or 2N3904, this could be around 100. That means that if you have 0.1 mA flowing from the base to the emitter, you can have 10 mA...
This is the amplification effect of a transistor. The base-emitter junction can also act as a switch. When no current is applied to the base, the junction prevents current from flowing from the emitter to the collector, and when a current is applied to the base, it allows the current to...
What is a BJT? A Bipolar Junction Transistor (also known as a BJT or BJT Transistor) is a three-terminal semiconductor device consisting of two p-n junctions which are able to amplify or magnify a signal. It is a current controlled device. The three terminals of the BJT are the base, ...
From the circuit point of view, the basic amplifier circuit can be seen as a dual-port network. The role of amplification is reflected in the following aspects: 1) The amplifier circuit mainly uses the control function of the transistor or the field-effect tube to amplify the weak signal. ...
always amplify there are certain conditions for that right so in this example we'll explore this in great detail we'll understand under what conditions our transistor acts as an amplifier and under what condition it doesn't so we'll explore the complete behavior of a transistor in this video...