xc (t) Xp (t) 7.29. Figure P7.29(a) shows the overall system for filtering a continuous-time signal using a discrete-time filter. If Xc(jw) and H(ejw) are as shown in Figure P7.29(b), with 1/T = 20 kHz, sketch Xp(jw), X(ejw), Y(ejw), Yp(jw), and Y.(jw). +00 p(t) = Σ8(t-nT) 8118 Conversion x[n] = xc (nT) h[n] y[n] yc (nT) Conversion to a sequence to an H(e) impulse train Xc(jw) 1 -π X104 TTX104 (a) w (b) Figure P7.29 1 H(el) H(jw) Yp (t) Yc (t) 1/11- πT/T w

Transmitter: a carrier frequency of 108 kHz and a modulating frequency of 0.3 kHz to 3.4 kHz is applied to an amplitude modulator. The USB and the LSB are both transmitted to the distant receiver, with a suppressed carrier. Receiver: the resultant USB and LSB from the transmitter are input to an amplitude demodulator. A carrier frequency of 108 kHz is reintroduced to the demodulator. Determine the following: 1. The LSB and USB at the output of the modulator. 2. The LSB and USB at the output of the demodulator.

7. In DC analysis all capacitors are replaced by a short circuit equivalent and in AC as an open circuit. Select one:TrueFalse   8. En el análisis AC del BJT todas las fuentes de cd se hacen igual a cero y las reemplaza una conexión de cortocircuito a tierra.   Seleccione una: Verdadero Falso   9. The superposition theorem is applicable to the analysis and design of the dc and ac components of a BJT network, allowing the analysis of the system's dc and ac responses to be separated. Select one:TrueFalse   10. An equivalent model is a combination of appropriately selected circuit elements that accurately simulates the real behavior of a semiconductor device in any operating condition. Select one:TrueFalse

Transmitter: a carrier frequency of 108 kHz and a modulating frequency of 3.4 kHz is plied to an amplitude modulator. The USB and the LSB are both transmitted to the distant eceiver, with a suppressed carrier. Receiver: the resultant USB and LSB from the transmitter are input to an amplitude demodulator. A carrier frequency of 108 kHz is reintroduced to the demodulator. Determine the following: 1. The LSB and USB at the output of the modulator. 2. The LSB and USB at the output of the demodulator.