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5) In the circuit below, we would like to bias the transistor +10V +10V such that it operates in the active region. (Assuming that we want to have a de collector current of le = 1ma, Vor = 0.7V and ß = 100.) R le Re 80k a) Find the Vihevnin and Ravein equivalent for the shaded region of the circuit. 8- 100 Ra RE 20k? b) Find the value of R, which places the transistor in the active region with /e = 1ma. c) Find the value of Re which are also suitable for keeping the transistor in the active region with Ie = imA.

5) In the circuit below, we would like to bias the transistor +10V +10V such that it operates in the active region. (Assuming that we want to have a de collector current of le = 1ma, Vor = 0.7V and ß = 100.) R le Re 80k a) Find the Vihevnin and Ravein equivalent for the shaded region of the circuit. 8- 100 Ra RE 20k? b) Find the value of R, which places the transistor in the active region with /e = 1ma. c) Find the value of Re which are also suitable for keeping the transistor in the active region with Ie = imA.

Question
**Exercise 5** In the circuit below, we aim to bias the transistor so that it operates in the active region. We assume a DC collector current of \( I_C = 1 \text{mA} \), a base-emitter voltage \( V_{BE} = 0.7 \text{V} \), and a transistor beta \( \beta = 100 \). **Tasks:** a) Find the \( V_{\text{Thevenin}} \) and \( R_{\text{Thevenin}} \) equivalent for the shaded region of the circuit. b) Determine the value of \( R_E \) which places the transistor in the active region with \( I_C = 1 \text{mA} \). c) Calculate a suitable value for \( R_C \) that ensures the transistor remains in the active region with \( I_C = 1 \text{mA} \). **Circuit Diagram Explanation:** The circuit comprises a transistor with the following key components: - A power supply of \( +10 \text{V} \). - Resistor \( R_1 = 80 \text{k}\Omega \) and \( R_2 = 20 \text{k}\Omega \), forming a voltage divider. - The collector current \( I_C \) flows through \( R_C \) and \( R_E \). - The transistor has a current gain of \( \beta = 100 \). The goal is to calculate the Thevenin equivalent and determine appropriate \( R_E \) and \( R_C \) values for optimal transistor operation in the active region.
Transcribed Image Text:**Exercise 5** In the circuit below, we aim to bias the transistor so that it operates in the active region. We assume a DC collector current of \( I_C = 1 \text{mA} \), a base-emitter voltage \( V_{BE} = 0.7 \text{V} \), and a transistor beta \( \beta = 100 \). **Tasks:** a) Find the \( V_{\text{Thevenin}} \) and \( R_{\text{Thevenin}} \) equivalent for the shaded region of the circuit. b) Determine the value of \( R_E \) which places the transistor in the active region with \( I_C = 1 \text{mA} \). c) Calculate a suitable value for \( R_C \) that ensures the transistor remains in the active region with \( I_C = 1 \text{mA} \). **Circuit Diagram Explanation:** The circuit comprises a transistor with the following key components: - A power supply of \( +10 \text{V} \). - Resistor \( R_1 = 80 \text{k}\Omega \) and \( R_2 = 20 \text{k}\Omega \), forming a voltage divider. - The collector current \( I_C \) flows through \( R_C \) and \( R_E \). - The transistor has a current gain of \( \beta = 100 \). The goal is to calculate the Thevenin equivalent and determine appropriate \( R_E \) and \( R_C \) values for optimal transistor operation in the active region.
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