A bipolar transistor has parameters
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Microelectronics: Circuit Analysis and Design
- supply is Vcc=40V and the input voltage to the base circuit is VB=6V. If VCE(sat)=1.2V, VBE(sat)=1.6V and Rg=0.70, then the forced B would be: The beta B of a bipolar transistor shown below varies from 12 to 75. The load resistance is Rc=1.20. The DC Ic Vcc Rg IB VCE VB V BE Select one: O a. 5.14 Ob. 2.14 O c. 4,14 O d. 3.14arrow_forwardCO sensitivily in KH. 7-26 A VCO has an unmodulated carrier frequency of 100 MHz and sensitivity of – 12 kHz/V. Delermine the frequency when the input signal is set at 5 V.arrow_forwardDetermine the modulation index for a PM modulator with a deviation sensitivity of kp= 1.7 rad/V and a modulating signal of vm(t) = 7cos (2π3000t). A phase modulator has kp= 2.8rad/V. What rms voltage of a sine wave causes a peak phase deviation of 74°? Determine the peak phase deviation for a PM modulator with deviation sensitivity K = 3.8 rad/V and a modulating signal vm= 12 sin(2π1000t).arrow_forward
- For the given circuit determine the voltage gain by letting the emitter capacitor with negligible reactance for the frequency, and an re of 25:arrow_forwardThis problem is AC analysis problem. DC analysis is not needed to answer the question. A) If we assume that the peak voltage of Vbe must be less than 10 mV to avoid small signal violations determine the value of Rsig if Vi has a peak amplitude of 1 V and Is = 1mA. Hint: Don't forget r!! Answer: Rsig =. B) If you did the DC analysis on this problem and calculated Vc = 50 mV and Vs = -100 mV what is the maximum amplitude of the output voltage while the circuit stays in active mode. Answer: Vo,max =, When you "verify" a mode of operation you will need to calculate all three voltages (Vc, Ve, VE for BJTS and VG, Vs, Vp for MOSFETS) and show the correct two conditions are satisfied. Assume Capacitors acts like open circuits at DC and short circuits for AC. > Assume the following: 5V o Beta = 100 O VBE = 0.7 o V: (Thermal) = 26 mV o Vr (Threshold) = 2V O VA = - o For MOSFET saturation mode: assume: lp = K(VGs-Vr)? (Assume K = 10 mA/V²). 5kn C2 01 C1 Rsig 1kn 10k Vi IIs :C3 1mA -5Varrow_forwardAssignment-1 Q1. The output characteristic of a typical transistor is shown below, where the quiescent point is selected on it. This transistor is used in the bias circuit presented below. Find the suitable values of Rg and Rc to fix the Q-point of the circuit properly. +Vcc = 12 V 12- Ia = 70 uA 10- Is 60 uA Ta=50 A 8- Rc 6. la= 40 uA 4. Is = 30 uA 2- Is = 20 uA B = 100 VBE = 0.7 V -2- 6 8 10 12 14 16 VCE (V) toarrow_forward
- Design (only the block diagram) an Armstrong indirectly FM modulator to generate an FM carrier with a carrier frequency of 98.1MHz and df (frequency deviation) =75kHz.A narrowband FM generator is available at a carrier frequency of 100 KHz and a (frequency deviation) df=10Hz.The stockroom has an oscillator with an adjustable frequency in the range of 10 to 11MHz.There are plenty of Frequency multipliers.arrow_forwardIf a modulating signal of 20Khz is applied to an AM modulator of the S.S.B type, the bandwidth will be of value:arrow_forward(a) What collector current is required for a bipolar transistor to achieve a transconductance of 40 mS? (b) Repeat for a transconductance of 200μS. (c) Repeat for a transconductance of 40 μS.arrow_forward
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