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ee481Lecture10

# ee481Lecture10 - E =1mA Bias Strategy • Try to Pin I C...

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RIT Professor Bowman 1 Lecture 10 Discrete BJT DC Biasing Techniques Designing for a DC Bias Classic Base Bias Two Supply Bias CB Feedback Resistor Bias Constant Current Bias

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RIT Professor Bowman 2 Bias Point Considerations Select and Maintain Desired Bias Point Process Variations – β , I S Temperature Variations – V BE , β , I S
RIT Professor Bowman 3 Poor Bias Circuits Trying to Set V BE or I B

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RIT Professor Bowman 4 DC Bias with Emitter Resistance 1 + + = β B E BE BB E R R V V I
RIT Professor Bowman 5 Amplifier Design Example For VCC=+12 V and β =100, Set I

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Unformatted text preview: E =1mA Bias Strategy • Try to Pin I C and V CE by setting I E • Set V CE to Optimize Vo Swing • Choose a Base Voltage Divider Current that is small compared to I E • Refine Bias Point for I E RIT Professor Bowman 6 Biasing with Two Supplies 1 + + − = β B E BE EE E R R V V I RIT Professor Bowman 7 CB Feedback Resistor Biasing 1 1 + = = + + − = β R I R I V R R V V I B E B B CB B C BE CC E β RIT Professor Bowman 8 DC Biasing Using a Constant Current Source...
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ee481Lecture10 - E =1mA Bias Strategy • Try to Pin I C...

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