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5. The equivalent circuit for the bipolar transistor in Fig.3 has components: 0.15 [pF], 8m= 8m= 180 [mS], C= 0.6[pF]. =
Posted: Thu May 05, 2022 2:45 pm
by answerhappygod
- 5 The Equivalent Circuit For The Bipolar Transistor In Fig 3 Has Components 0 15 Pf 8m 8m 180 Ms C 0 6 Pf 1 (151.02 KiB) Viewed 32 times
5. The equivalent circuit for the bipolar transistor in Fig.3 has components: 0.15 [pF], 8m= 8m= 180 [mS], C= 0.6[pF]. = 400[2], C₁= 5.2 [pF], C₁= 5.2 [pF], C 0.15 [pF], r π a. Write expressions for the y-parameters of the transistor and find their values at 220 MHz. Is the transistor absolutely stable? b. The transistor from Fig.3 is used in the amplifier circuit, which has the functional diagram in Fig.4. Inductors L11 and L12 are uncoupled. The amplifier must meet the following specifications and requirements: Center frequency: 220 MHz, 3dB bandwidth: 25 MHz in synchronous tuning, Matching at the input port: RG = 500 (no matching requirement at the output port) • Stability factor of K = 5. The amplifier must stay stable if either the generator incl. RG, or the load RL, or both are disconnected. The last requirement ensures that the feedback effect through capacitor Cu may be disregarded in design of the input and output tuning circuits. The role of parallel resistor Rp is to fulfil the last disconnection requirements. Calculate the values of Rp and RL. c. Find the components of the input tuning circuit L11, L12, and C1. Rp C₂ L2 RG ww EG iellll illll L11 L12 C₁ Fig.4 www H1 RL Illll ww + V₂ I