• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
Figure 4-2.Actual output of a series-positive limiter
Figure 4-3B.Positive and negative bias. NEGATIVE BIAS

Neets Module 09-Introduction to Wave-Generators and Wave-Shaping Circuits
Page Navigation
  145    146    147    148    149  150  151    152    153    154    155  
4-4 You can readily see that the formula comparison of the forward- and reverse-bias resistance conditions shows that a small amount of reverse current will flow during the limited portion of the input waveform. This small amount of reverse current will develop as the small positive voltage (0.09 volt) shown in figure 4-2 (T0 to T1 and T2 to T3). The actual amount of voltage developed will depend on the type of diode used. For the remainder of this chapter, we will use only idealized waveforms and disregard this small voltage. SERIES-POSITIVE LIMITER WITH BIAS.—In the series-positive limiter (figure 4-1, view (A)), the reference point at the bottom of resistor R1 is ground, or 0 volts. By placing a dc potential at point (1) in figure 4-3 (views (A) and (B)), you can change the reference point. The reference point changes by the amount of dc potential that is supplied by the battery. The battery can either aid or oppose the flow of current in the series-limiter circuit. POSITIVE BIAS (aiding) is shown in view (A) and NEGATIVE BIAS (opposing) is shown in view (B).






Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.