Basic Circuit Theory Chpter17 Problems (Unless otherwise specified, the diode characteristic is assumed to be as shown in Fig. 17-15b) 1 Sketch the characteristic of each of the following circuits shown in Fig. 17-31, the diode characteristic is shown in Fig. 17-31e. 2 Sketch the transfer characteristic of each of the following circuits shown in Fig. 17-32 the transfer characteristic being . in vv / 0 + - + - + - - ++ - v ?1 i V2 v ?1 i v i v ?1 i v i 2=g (a) (b) (c) (d) (e) Fig. 17-31 For prob. 1. 3 If in the circuit of Fig. 17-32b the input voltage is = A sin 5t, sketch the output voltage for A= 1V. Repeat for A= 3V. )(tv in + - + - - + -+ + - - - + + ?1 in vV2 o v ?1 in v V2 o v V2 (a) (b) Fig. 17-32 For prob. 2. 4 Obtain the transfer characteristic of the following circuit shown in Fig. 17-33. Let the input voltage be a triangular wave. Sketch the output voltage. 5 Obtain the i-v characteristic of the following circuit shown in Fig. 17-34. 6 For the circuit of Fig. 17-35 where e(t) = 10 + 0.5 cos t A, diode characteristic , find the voltage v in diode. )0( 2 >= vvi DaLian Maritim 1 e University Fig. 17-36 For prob. 7. R A e v 1 E 2 E B e 7 The Fig. 17-36 is a logic circuit. What does it do? + - + - + - Fig. 17-34 For prob. 5. i v V2 V1 A2A1 + - + - + - - + - + - + + - ?1 in v ?2 o v ?2 ?3 Fig. 17-33 For prob. 4. + - )(ti in v i ? 3 1 D Fig. 17-35 For prob. 6. Basic Circuit Theory Chpter17 Problems 8 The Fig. 17-37 is a “ diode matrix ”. As shown the circuit encodes the presence of e into the binary number [ 1 0 1 ] and that of e the number [ 1 1 0 ]. Explain the operation of the circuit. A B + - + - A e 1 x 2 x 3 x B e 1 0 A e 2 x 3 x B e 1 x 0 1 1 1 Fig. 17-37 For prob. 8. 9 Construct a diode matrix to encode each of the 10 decimal digits into its binary representation. 10 A nonlinear capacitor may be used as a harmonic generator. Let a nonlinear capacitor be characterized by a charge-voltage (q～v) relation: q = v+v 3 . Let v(t) = sint. Find the harmonics of the current in the capacitor. Choose a q～v relation such that only the third harmonics appears. Reference Answers to Selected Problems 6: 2 – 0.0715 cos t V. 7: “ AND ” gate. DaLian Maritime University 2