1 / 19

Semiconductor junctions

Semiconductor junctions. And semiconductors. Figure 8.1-1. Band-gap context of semiconductors. . ( a) Donor impurities under E-field (= movement of loose electrons) . ( b) Acceptor impurities under E-field (movement of loose holes) .

dasha
Download Presentation

Semiconductor junctions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Semiconductor junctions And semiconductors

  2. Figure 8.1-1. Band-gap context of semiconductors.

  3. (a) Donor impurities under E-field (= movement of loose electrons) (b) Acceptor impurities under E-field (movement of loose holes)

  4. Figure 8.1-3. Holes and electrons analogy to bubblets and pellets.

  5. Figure 8.1-4(a) . The Silicon lattice (diamond lattice unit cell). Figure 8.1-4(b). The array of tetrahedrons along the (110) direction of the crystal.

  6. Figure 8.2-1. Ion implantation process of pnjunction. And a slice across the junction

  7. Figure 8.2-2. Uncovered impurity sites in the vicinity of the pnjunction boundary

  8. (a) I (V) on linear scale. (b) I (V > 0) on logarithmic scale.

  9. Figure 8.3-1. Circuit analysis conductance models of the diode. (A ‘1 mA diode’ is represented)

  10. Figure 8.4-1(a). Series diode and load, also called a half-wave rectifier (HWR). When Vs < 0 the current flow is blocked by the ‘OFF’ state of the diode. Figure 8.4-1(b). Voltage across the load due to IL .

  11. Figure 8.4-2(a). Diode bridge and load, also called a full-wave rectifier (FWR). Figure 8.4-2(b). Voltage across RL due to current through the diodes for the FWR (a.k.a. FWB). Figure 8.4-3 Full-wave rectifier (FWR) topology of figure 8.4-2(a) drawn as a full-wave bridge (FWB). Compare the position of the diodes between this figure and that of figure 8.4-2(a)

  12. Figure 8.4-4. Three-phase sum of rectified currents. The outcome shows up as a steady-state signal with a ripple of peak-peak amplitude VR and frequency = 6 x f0 .

  13. Figure 8.4-5(a). HWR with a capacitance in parallel with the load Figure 8.4-6(a) Outputof HWR with C.

  14. Figure 8.4-5(b). FWR with a capacitance in parallel with the load Figure 8.4-6(b) Output of FWR with C

  15. Figure 8.4-7(a) Zener diode component . When VR exceeds VZ the junction break down. Figure 8.4-7(b) Zener diode I-V response

  16. Figure E8.4-2 Full-wave rectifier AC-DC Zener-regulated charging plug.

  17. DIODE-CAPACITANCE SUBCIRCUIT PRIMITIVES Figure 8.5-1. Peak detector

  18. DIODE-CAPACITANCE SUBCIRCUIT PRIMITIVES Figure 8.5-2. level shifter

  19. Figure 8.5-3. voltage doubler = level shifter followed by peak detector.

More Related