- Construct A Common Emitter Small Signal Amplifier With A Gain B Of 120 It Has A Supply Voltage Of 15v And A Load Resi 1 (55.04 KiB) Viewed 32 times
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Construct a common-emitter small signal amplifier with a gain (B) of 120. It has a supply voltage of 15V and a load resistance (RL) of 980 2. The emitter-resistor (RE) is 1842 with a current of 7.05 mA. Calculate the the values of all other resistors in the network. Calculate also the value of the quiescent drain current (ID) and collector-emitter voltage (VD) using the graphical approach. Once the values of the resistors are calculated, construct the circuit (using CAD* tool). Replace Vcc with a variable voltage supply from 0 to 15 V. Adjust the value of Vcc at 1 V interval from 0 V to 15 V and measure the collector-current (Ic) for each value of Vcc. Simulate* and gather data. Assume the transistor to be used is a 2N2222 (NPN BJT). See requirements below. a) Solutions (mathematical and graphical) b) Schematic Diagram c) Data and graph of Vcc= VCE VS IC
Construct a transistor switch using an NPN BJT that will drive an LED with a rated continuous forward current of 30 mA. Design the switch so that the forward current to the LED shall not be greater than 60 mA. The LED will turn when an input current of 85 A. Calculate the value of the resistors. Assume a supply voltage of 5 V. Construct the circuit (using CAD* tool). Simulate the circuit by turning “on” and “off the switch. Measure the input and output current at both states. Adjust the circuit if the output current exceeds the required or less than that of the LED's continuous forward current rating. See requirements below. c) Solutions d) Schematic Diagram e) Data of the “on” and “off” state