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Tirth Patel Se Etrx 2019110040: Ed Exp 7: Fet Characteristics and Biasing 1. Characteristics

This document discusses the characteristics and biasing of N-channel and P-channel JFETs. It examines the transfer and output characteristics of JFETs in common gate, common drain, and common source configurations. It also covers three biasing techniques - self biasing, fixed biasing, and voltage divider biasing. For each biasing circuit, the document shows the schematic, provides calculations to determine the Q-point, and graphs the load line and Q-point on the output characteristics curve. The key learning outcomes are understanding the characteristic graphs of N-channel and P-channel JFETs, different biasing techniques, and how to calculate or locate the Q-point of a JFET circuit.

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Hitanshu Jain
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46 views24 pages

Tirth Patel Se Etrx 2019110040: Ed Exp 7: Fet Characteristics and Biasing 1. Characteristics

This document discusses the characteristics and biasing of N-channel and P-channel JFETs. It examines the transfer and output characteristics of JFETs in common gate, common drain, and common source configurations. It also covers three biasing techniques - self biasing, fixed biasing, and voltage divider biasing. For each biasing circuit, the document shows the schematic, provides calculations to determine the Q-point, and graphs the load line and Q-point on the output characteristics curve. The key learning outcomes are understanding the characteristic graphs of N-channel and P-channel JFETs, different biasing techniques, and how to calculate or locate the Q-point of a JFET circuit.

Uploaded by

Hitanshu Jain
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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TIRTH PATEL SE ETRX

2019110040
ED EXP 7: FET CHARACTERISTICS AND BIASING
1. CHARACTERISTICS N-Channel JFET
1. Common Drain configuration

Figure 1: Schematic

Figure 2: Transfer Characteristics


Figure 3: Schematic

Figure 4:Output characteristics


2. Common Gate configuration

Figure 5:Schematic

Figure 6:Transfer Characteristics


Figure 7:Schematic

Figure 8:Output Characteristics


3. Common Source configuration

Figure 9:Schematic

Figure 10:Transfer Characteristics


Figure 11:Schematic

Figure 12: Output Characteristics


P-Channel JFET 1.Common Drain configuration

Figure 13:Schematic

Figure 14:Output Characteristics


Figure 15:Schematic

Figure 16:Output Characteristics


2.Common Gate configuration

Figure 17:Schematic

Figure 18:Transfer Characteristics


Figure 19: Schematic

Figure 20: Output Characteristics


3.Common Source configuration

Figure 21:Schematic

Figure 22: Transfer Characteristics


Figure 23:Schematic

Figure 24: Output Characteristics

2. BIASING
N-Channel JFET
1. Self-Bias

Figure 25:Schematic

Figure 26:Calculations
Figure 27:Waveform with Load-Line and Q-point

As we can see from the waveform, the Q-point is at about


VQ=-1.8v
IDQ=1.8mA
Which corresponds to our calculations
2. Fixed Bias

Figure 28:Schematic

Figure 29: Calculations


Figure 30: Waveform with Lod-line and Q-point

As we can see from waveform, the Q-point is at about


VQ=2V
IDQ=1.33mA
Which corresponds to our calculations
3. Voltage Divider Bias

Figure 31: Schematic

Figure 32: Calculation


Figure 33: Waveform with Load-line and Q-point

As we can see from the waveform, the Q-point is at about


VQ=-1.8V
IDQ=2.3mA
Which corresponds to our calculations
P-Channel JFET 1. Self Bias

Figure 34:Schematic

Figure 35:Calculations
Figure 36:Waveform with Load-line and Q-point

As we can see from the waveform, the Q-point is at about


VQ=-2.1V
IDQ=2.1mA
Which corresponds to our calculations
2. Fixed Bias

Figure 37:Schematic

Figure 38 :Calculations
Figure 39: Waveform with Load-line and Q-point

As we can see from the waveform, the Q-point is at about


VQ=-2V
IDQ=2.2mA
Which corresponds to our calculations
3. Voltage Divider Bias

Figure 40 :Schematic

Figure 41: Calculation


Figure 42: Waveform with Load-line and Q-point

As we can see from the waveform, the Q-point is at about


VQ=-1.8V
IDQ=2.5mA
Which corresponds to our calculations

LEARNING OUTCOMES
• Learned about the characteristic graphs of N-Channel and P-Channel JFETs in CG, CD
and CS configurations
• Learned about biasing techniques such as Self-Biasing, Fixed Biasing and Voltage
Divider Biasing.
• Understood how to calculate or graphically locate Q-point for a given JFET circuit

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