Consider the bridge circuit and diff-amp described in Problem 11.27 . The BJT diff-amp is to be replaced with a MOSFET diff-amp as shown in Figure 11.19 . The transistor parameters are
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Microelectronics: Circuit Analysis and Design
- Consider the MOSFET amplifer circuit shown in Figure below. Assume µnCox(W/L) = 4mA/V2, Vt = 1V Draw an equivalent DC model, and equivalent circuit of the amplifier. Determine the drain current and its overall voltage gain respectively.arrow_forward(Fundamentals of BJT) Determine: a) Transistor terminal voltages b) Transistor junction voltagesarrow_forwardExercises 1. Derive mathematical expression to determine the stability factor a S(Vcc) = Alc/AVcc for the emitter-stabilized bias circuit. 2. Discuss and compare (by equations) between the relative levels of stability for the following biasing circuits: i. the fixed-bias circuit, ii. the emitter-stabilized bias circuit, iii. the voltage-divider bias circuit, and iv. the voltage-feedback circuitarrow_forward
- The reason the AC saturation collector current is higher than the DC saturation current in power amplifiers is due to what? O bypass capacitor providing a short for the ac signal O bypass capacitor giving additional voltage to the circuit O Re being very small O The collector current cannot exceed the DC saturation current.arrow_forwardQUESTION 12: The differential amplifier shown in Figure P11.60 has a pair of pnp bipolars as input devices and a pair of npn bipolars connected as an active load. The circuit is biased by Io=0.24 mA, and the transistor parameters are ß = 80 , VẬP=90 V, and VAN = 115 V. (a) Determine Io such that the de currents in the diff-amp are balanced. (b) Find the open-circuit differential-mode voltage gain. (c) Determine the differential-mode voltage gain if a load resistance R1 = 260 k2 is connected to the output. Io (HA) Format : 4.595 Ad (open circuit) Format : 4594.5 Ag (closed loop) Format : 796.4 V+ Q2 Oa 어 RL Q3 Q4 V-arrow_forwardQUESTION 10: The circuit parameters for diff-amp shown in Figure 11.30 are V* = 6 V, V = -6 V, and Io = 0.45 mA. The transistor parameters are ß = 74, V₁1 = V42 = 115 V₂ V 43 V 44 = 90 V, and V45 = ∞0. Determine the open-circuit differential-mode voltage gain. What is the output resistance of the diff-amp? Find the value of load resistance R₁ that reduces the differential-mode gain to 71 percent of the open-circuit value. Ad (open circuit) Format: 7842.2636277565 R₂ (kn) Format: 429.43075670268 Format: 672.96782467086 R₁ (kn) ibl iz i₁ 8mºd 2 V+ 25 V- i₂ = 8m'd 2 24 2₂ Signal ground V- Figure 11.30 Cc 8md 2 -Ove RL Sning Toolarrow_forward
- 9. Design a biased-transistor circuit using VBB = Vcc= 10 V for a Q-point of Ic = 5 mA and VCE 4 V. Assume pc = 100. The design involves finding RB, RC, and the minimum power rating of the transistor. (The actual power rating should be greater.) Sketch the circuit.arrow_forwardExplain how you can find the common emitter de current gain, B, and the common emitter ac current gain, hre, from the common emitter output characteristics of an npn transistor. You need to draw typical output characteristics in scales and provide numerical calculations to support your explanation.arrow_forward2 a) i) Draw typical output characteristics of a common emitter npn transistor and clearly identify the active, saturation, and cut off regions on your drawing. ii) Explain how you can find the common emitter de current gain, B, and the common emitter ac current gain, hre, from the common emitter output characteristics of an npn transistor. You need to draw typical output characteristics in scales and provide numerical calculations to support your explanation.arrow_forward
- |12.5 The class A emitter follower in the figure to the right is to operate from +/- 10 V supplies and drive a 16 ohm load with a sinusoid with a 5 V peak amplitude. If the incremental gain is to remain within 2% of unity what must the bias current, I, be? What is the resulting efficiency?arrow_forward2. The circuit in Figure 2 has a BJT transistor with B= 200, VA = 20 V. Determine BJT DC collector current and DC collector voltage. Determine the small-signal input resistance seen by the AC voltage source, the output resistance at Vout, and the transfer function Vout/Vin. HH 1.7 V 100k Figure 2, Problem 2 10 V 2k Vout 2karrow_forward1. For the circuit in Figure 1: a) Calculate the input and output power if the input signal results in a base current of 5 mA rms. b) Calculate the input power dissipated by the circuit if Rg is changed to 1.5 kN. c) What maximum output power can be delivered by the circuit if RB is changed to 1.5 kN? d) If the circuit is biased at its center voltage and center collector operating point, what is the input power for a maximum output power of 1.5 W? +Vcc (18 V) Rc = 16 2 RB 1.2 k2 V. B - 40 100 µF Figure 1arrow_forward
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