By H. E. Kaden (auth.)

ISBN-10: 1349818046

ISBN-13: 9781349818044

ISBN-10: 1349818062

ISBN-13: 9781349818068

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Additional resources for Transistors Applied

Example text

The voltage reaction of the output voltage V2 on the input voltage VI appears in this characteristic field. e. for the current h corresponding, for instance, to the characteristic for - VCE = 5 V. Nevertheless, because of the voltage reaction, the dotted characteristic applies if the 38 THE FOUR QUADRANT CHARACTERISTIC FIELD [4 collector voltage, in accordance with the resistance straight line for RL = 2 ldl, varies with the modulation. Only the smaller input voltage VI is now required for the same current control ;2.

C. current values are always used in the following statements. c. c. values are shown separately in two circuit dia grams in Fig. 1. It can be seen, for example, tbat the output voltage is rotated in phase by 180 0 in relation to the input voltage. c. c. supply, we finally reach the transistor equivalent circuit diagram whicb will be sbown later. If we contrast tbe electron tube fundamental circuit with tbe transistor fundamental circuit we leam which electrodes correspond to each otber. Tbus the grid and tbe base, the catbode and the emitter, the anode and tbe collector all bave the same task.

6kil. c. c. input resistance RBB, considerable errors can arise in certain circumstances. Strictly speaking, a four quadrant set of characteristic curves which has been statically recorded point by point should be used, because the normal published dynamic characteristics are only valid for a constant crystal temperature and therefore only apply for a particular working point of constant dissipation. CHAPTER 8 APPARENT INTERNAL RESISTANCE WITH LOAD VARIATION It must be noted that the voltage amplification changes with variation of the load resistance.