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transistor is biased

transistor is biased

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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  1. For the circuit in Figure 1, the transistor is biased so that ICQ is 10 mA and VCEQ is 8 V. As a starting point, let VRE be 20% of VCC. Calculate the values needed for RE and RC.Assume β is 100. Select the nearest standard values for the two
    Calculate the values of R1 and R2
12:55 This account does not allow editing on your Sign in device. For an account with full acces...more You will recall from your study of BJT amplifiers that each transistor must be biased so that they will be operating in the active (linear) region. If this step is omitted, the output signal will be distorted. In this experiment, you will see how the selection of the bias network components directly affects the accuracy and stability of the bias point against component tolerances and transistor parameter variations. PRELIMARY For the circuit in Figure 1, the transistor is biased so that Ica is 10 mA and VCEQ is 8 V. As a starting point, let Vre be 20% of Vcc. Calculate the values needed for Re and Rc. Assume B is 100. Select the nearest standard values for the two resistors. 1. VRc= Rc = VRe= le = Re= Vcc=20V KVL Ice Rc Ico R1 Saturation point VCEQ Quiescent point 2N3904 · RE VCEO R2 Load line Cut off point Figure 1: The basic biasing circuit for the BJT amplifier. 2. Referring to Figure 2, set Rih to (B+1) Rp and calculate the values of R1 and R2. 10 Figure 2: The equivalent circuit of the input bias circuit. Rth = Ith or Ib= Vth = R1 = R2 = 3. Repeat the above procedure, except design for VRE = 40% Vcc. This will be design#2. 3-1: Vcc=20V
Transcribed Image Text:12:55 This account does not allow editing on your Sign in device. For an account with full acces...more You will recall from your study of BJT amplifiers that each transistor must be biased so that they will be operating in the active (linear) region. If this step is omitted, the output signal will be distorted. In this experiment, you will see how the selection of the bias network components directly affects the accuracy and stability of the bias point against component tolerances and transistor parameter variations. PRELIMARY For the circuit in Figure 1, the transistor is biased so that Ica is 10 mA and VCEQ is 8 V. As a starting point, let Vre be 20% of Vcc. Calculate the values needed for Re and Rc. Assume B is 100. Select the nearest standard values for the two resistors. 1. VRc= Rc = VRe= le = Re= Vcc=20V KVL Ice Rc Ico R1 Saturation point VCEQ Quiescent point 2N3904 · RE VCEO R2 Load line Cut off point Figure 1: The basic biasing circuit for the BJT amplifier. 2. Referring to Figure 2, set Rih to (B+1) Rp and calculate the values of R1 and R2. 10 Figure 2: The equivalent circuit of the input bias circuit. Rth = Ith or Ib= Vth = R1 = R2 = 3. Repeat the above procedure, except design for VRE = 40% Vcc. This will be design#2. 3-1: Vcc=20V
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