Sketch the circuit in your lab notebook, labeling the values of all components. It is an ideal transistor amplifier circuit for applications where a higher level of gain is required than that which would be provided by a single transistor stage. TRANSISTOR AMPLIFIERS The circuit we will use is mounted on a pre-wired circuit board. The two transistor amplifier offers a reasonably high impedance while providing a low output impedance. The design includes PNP and NPN transistors and adopts the overall topology of the Sziklai pair, but with additional resistors included to define the gain.
This electronic circuit design shows a simple two transistor amplifier with feedback to offer a defined gain level that can be determined by the resistors in the circuit. A transistor is a miniature electronic component that can do two different jobs.
#Transistor amplifier generator#
Transistor circuit collection Common emitter Emitter follower Common base Darlington pair Sziklai pair Current mirror Long tailed pair Constant current source Capacitance multiplier Two transistor amplifier High pass filter Switch circuits Pulse generator simple class A npn transistor amplifier with 12V power source. Thus, a weak signal (0.1V) applied to the input circuit appears in the amplified form (10V) in the collector circuit.Simple two transistor amplifier There are many differnet transistor amplifier configuration - one here uses a PNP and NPN transistor and has the gain defined by two resistors. Typically, transistors consist of three layers, or terminals, of a semiconductor material, each of which can carry a current. When collector current flows through such a high resistance, it produces a large voltage drop across it. In the collector circuit, a load resistor R C of high value is connected. Stability considerations affect the maximum (stable) gain that can be achieved and the ease of design. For stability analysis, the active device in a linear amplifier can often be treated as a two-port (see Figure 2.5.6 (a)). Common-base circuit, common-collector circuit and common-emitter circuit can. So it is not surprising that stable amplifiers can be designed using available transistors. A transistor can increase the strength of a weak signal and hence it can be used as an amplifier in a circuit.
#Transistor amplifier software#
This change is almost the same in collector current because of the transmitter action. TransistorAmp is a circuit design software for bipolar transistor amplifiers. When a weak signal is applied to the input, a small change in signal voltage causes a change in emitter current (or we can say a change of 0.1V in signal voltage causes a change of 1mA in the emitter current) because the input circuit has very low resistance.
The DC voltage V EE keeps the emitter-base junction under the forward biased condition regardless of the polarity of the input signal and is known as a bias voltage. The DC voltage V EE is applied to the input circuit along with the input signal to achieve the amplification. Transistor can be used as amplifier in the following three configurations. The input signal or weak signal is applied across the emitter base and the output is obtained to the load resistor R C which is connected in the collector circuit.
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