small signal amplifier as shown in the picture. If the input signal is sinusoidal  1 mVpp and β = 100, find: the load line and the Q point of the amplifier

An RF amplifier is composed of a cascade of two amplifier devices. The first has a power gain of 190W/W. The second has a power gain of 100W/W. What is the overall power gain of the cascade in dB (to two decimal places)?

Figure 2 shows a typical BJT amplifier, with its parasitic capacitances displayed. The current gain of the transistor is B=150 and the voltage gain of the amplifier is Am =-125. The small signal resistances of the transistor are re =16 ohm and r0 = infinity, respectively. The values of resistors and capacitors in the figure are: R1 =80 kohm, R2 =20 Kohm, Rc = 2 Kohm, RE = 2 Kohm, Rs =50 W, RI=5 kohm, Cs=2 uF, Cc=2 uF, Ce =10 uF, Cbc =4 pF, Cbe = 10 pF, Cce =1 pF, Cwi = 4 pF, CWO = 9 pF, and Vcc = 20 V. a) Sketch a simplified circuit diagram of Figure 2 for high frequency analysis. b) Using the concept of "Miller effect capacitance", calculate the input and Output Miller effect capacitances of Figure 2, respectively. C) Determine the upper cut-off frequency of Figure 2 that is imposed by its input network only. d) Explain briefly the possible ways to increase the upper cut-off frequencv of this amplifier.

In an NPN transistor used as an amplifier, which components or connections  control the current flow between the  others?    Pick those that apply.     Either N-doped regions.     The base, symbolized by B controls the current between the emitter, symbolized by E, and the collector, symbolized by C.     The emitter, symbolized by E controls the current between the base, symbolized by B, and the collector, symbolized by C.     The P-doped depletion region.