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Spring 1998
BJT Amplifier(DC design)
PURPOSE:
To carry out the DC design and testing of a BJT common-emitter amplifier
REFERENCE:
T. A. DeMassa, "Electrical and Electronic Devices, Circuits and
Instruments", West Publishing Company
PROCEDURE:
Carry out the DC design and testing of a NPN BJT(2N2222) common-emitter amplifier. Use a power supply voltage VCC = 5V and DC collector current IC = 2mA and let Q be in the middle of the DC load line.
The design must include the following:
1) DC circuit analysis
2) SPICE analysis
3) Electrical measurement verification.
DUE DATE:
The design project write-up is due March 3, 1998.
ECE 334 DESIGN PROJECT 2
Spring, 1998
BJT Amplifier(AC Design)
PURPOSE:
To design and test a BJT common-emitter amplifier using
an NPN 2N2222
REFERENCE:
T. A. DeMassa, "Electrical and Electronic Devices, Circuits and
Instruments", West Publishing Company.
PROCEDURE:
Design and build an NPN BJT common-emitter amplifier that operates in the audio frequency range (500 to 10,000 hertz). The overall voltage amplification is to be at least 50. Also, use coupling and bypass capacitors in the design. Furthermore, the design should include a small unbypassed resistor rE (50 to 100ohms) that is to be placed in series with the bypass resistors RE. This additional resistor (by proper choice) provides voltage amplification that is independent of hfe. Use a power supply voltage VCC = 5V and DC collector current IC = 2mA and let Q be in the middle of the DC load line.
The design must include the following:
1) Small-signal analysis
2) SPICE analysis
3) Electrical measurement verification.
DUE DATE:
The design project write-up is due March 10, 1998.
ECE 334 DESIGN PROJECT 3
Spring, 1998
BJT Buffer Amplifier
PURPOSE:
To design and test a BJT common-collector amplifier or emitter
follower amplifier.
REFERENCE:
T. A. DeMassa, "Electrical and Electronic Devices, Circuits and
Instruments", West Publishing Company.
PROCEDURE:
Design and build a NPN BJT common-collector amplifier(emitter follower) that operates in the audio frequency range(500 to 10,000 hertz). The overall voltage amplification is to be as close to 1 as possible using coupling and bypass capacitors. This BJT amplifier is also called a “buffer” amplifier and is used as an interface to a load to supply a larger amplified current.
The design must include the following:
1) Small-signal analysis
2) SPICE analysis
3) Electrical measurement verification.
DUE DATE:
The design project write-up is due March 31, 1998.
ECE 334 DESIGN PROJECT 4
Spring, 1998
Two Stage Amplifier
PURPOSE:
To design and test a two-stage BJT amplifier using 2 NPN 2N2222 transistors.
REFERENCE:
T. A. DeMassa, "Electrical and Electronic Devices, Circuits and
Instruments", West Publishing Company
PROCEDURE:
Design and build a two stage BJT amplifier that operates in the audio frequency range ( 10 to 10,000 hertz).The overall voltage amplification is to be at least 300. Also, each stage is to be a modified common emitter amplifier with coupling and bypass capacitors. The modification of each stage is to include a small unbypassed resistor rE (50-100ohms) that is to be placed in series with each of the bypass resistors RE. This additional resistor (by proper choice) provides voltage amplification that is independent of hfe.
The design must include the following:
1) Small-signal analysis
2) SPICE analysis
3) Electrical measurement verification.
DUE DATE:
The design project write-up is due May 5, 1998.