In a certain concert hall, echoes of the original audio signal x(n) are generated due to the reflections at the walls and ceiling. The audio signal experienced by the listener y(n) is a combination of x(n) and its echoes. Let ...
electricalstudent Latest Questions
D 7.138 A CE amplifier has a midband voltage gain of |Am|= 100 V/V, a lower 3-dB frequency fL = 100 Hz, and a higher 3-dB frequency fH = 500 kHz. In Chapter 10 we will learn that connecting a ...
*7.137 For the follower circuit in Fig. P7.137, let transistor Q1 have β =50 and transistor Q2 have β =100, and neglect the effect of ro. Use VBE = 0.7 V. (a) Find the dc emitter currents of Q1 and Q2. ...
**7.136 For the circuit in Fig. P7.136, called a boot-strapped follower: (a) Find the dc emitter current and gm, re, and rπ. Use β = 100. (b) Replace the BJT with its T model (neglecting ro), and analyze the circuit to ...
7.135 For the emitter follower in Fig. P7.135, the signal source is directly coupled to the transistor base. If the dc component of vsig is zero, find the dc emitter current. Assume β =100. Neglecting ro, find Rin, the voltage ...
7.134 For the emitter-follower circuit shown in Fig. P7.134, the BJT used is specified to have β values in the range of 80 to 180 (a distressing situation for the circuit designer).
D 7.133 For the circuit in Fig. P7.133, find the value of the bias current I that results in Rin = Rsig. Also, find the voltage gain vo/vsig. Assume that the source provides a small signal vsig and that β ...