Question

Use CAD software to simulate the common–emitter amplifier and characterize itsperformance. The simulations should include: 1) a dc bias analysis to verify thebias point of the transistor, 2) a transient analysis to verify the ac gain of the CE amplifier, 3) an ac analysis to characterize the frequency response of the circuit (i.e.,magnitude gain and phase shift over frequency) , 4) a parameter sweep analysisto characterize the output voltage versus load resistance (i.e., determine range of acceptable loads), 5) a temperature stability analysis (to determine variations innominal gain for temperature variations over the standard operating temperaturerange), and 6) input and output resistance (determined experimentally using thetest source method).

Answer 1

Use CAD software to simulate the common–emitter amplifier and characterize itsperformance is described below

Explanation:

Characteristics of Common Emitter Amplifier

• The voltage gain of common emitter amplifier is medium.
• The power gain is high in the common emitter amplifier.
• There is a phase relationship of 180 degrees in input and output.
• In the common emitter amplifier, the input and output resistors are medium.

The common emitter circuit is popular because it's well-suited for voltage amplification, especially at low frequencies. Common-emitter amplifiers are also used in radio frequency transceiver circuits. Common emitter configuration commonly used in low-noise amplifiers.

Why CE configuration having 180 degree phase shift in a CE amplifier, when base voltage increase, base current increases. It causes an increase in collector current also. The collector current causes a voltage drop in the collector resistor. ... Thus it produces a 180 phase shift.

⦁ CE is most widely used because it provides the voltage gain required for most of the day to day applications of preamp and power amps. ... ⦁ Common emitter is the most basic configuration for amplifier circuits. It also provide the maximum transconductance or voltage gain for a given load.

This type of biasing arrangement uses two resistors as a potential divider network across the supply with their center point supplying the required Base bias voltage to the transistor. Voltage divider biasing is commonly used in the design of bipolar transistor amplifier circuits.