Questions from Electronics

Q: If VBR2 is 6.4 V, determine the range for

If VBR2 is 6.4 V, determine the range for VBR1 using Eq. (17.1).

Q: Find the level of human body capacitance Cb that would result in

Find the level of human body capacitance Cb that would result in a 45-degree phase shift between vi and vG for the network of Fig. 17.30.

Q: For the network of Fig. 17.33, if C

For the network of Fig. 17.33, if C = 1 mF, find the level of R that will result in a 50% conduction period for the load in either direction if the turn-on voltage for the diac in either direction is...

Q: For the network of Fig. 17.40, in which

For the network of Fig. 17.40, in which V = 40 V, h = 0.6, VV = 1 V, IV = 8 mA, and IP = 10 mA, determine the range of R1 for the triggering network.

Q: For a unijunction transistor with VBB = 20 V, h =

For a unijunction transistor with VBB = 20 V, h = 0.65, RB1 = 2 kΩ (IE = 0), and VD = 0.7 V, determine: a. RB2. b. RBB. c. VRB . d. VP.

Q: Determine RC and RB for a fixed-bias configuration if VCC

Determine RC and RB for a fixed-bias configuration if VCC = 12 V,  = 80, and ICQ = 2.5 mA with VCEQ = 6 V. Use standard values.

Q: Given the relaxation oscillator of Fig. 17.68:

Given the relaxation oscillator of Fig. 17.68: a. Find RB1 and RB2 at IE = 0 A. b. Determine VP, the voltage necessary to turn on the UJT. c. Determine whether R1 is within the permissible range of va...

Q: For a phototransistor having the characteristics of Fig. 17.50

For a phototransistor having the characteristics of Fig. 17.50, determine the photo induced base current for a radiant flux density of 5mW/cm2. If hfe = 40, find IC.

Q: Design a high-isolation OR-gate employing phototransistors and LEDs

Design a high-isolation OR-gate employing phototransistors and LEDs.

Q: a. Determine an average derating factor from the curve of Fig

a. Determine an average derating factor from the curve of Fig. 17.58 for the region defined by temperatures between —25°C and +50°C. b. Is it fair to say that for temperatures greater than room temper...