Electronics: Theory and Practice by Gerardo Mesias

Author:Gerardo Mesias [Mesias, Gerardo]
Language: eng
Format: azw3, pdf
Publisher: Taylor and Francis
Published: 2012-09-09T16:00:00+00:00

DC conditions

Criteria

10R1 vs βRE Use

100 000 120 000 Approx.

Approximate method

Second stage

100 000 33 600 Thevenin

Thevenin method

Figure 7.22

AC conditions

Total voltage gain

Av = 94.073×32.967 = 3101

Using the gain impedance formula

Calculation of current gain

Figure 7.23

Output of first transistor

Figure 7.24

Output side

Figure 7.25

PROBLEM 7.4 CASCADED SYSTEMS

Figure 7.26

For the cascade amplifier, find the resistances as shown, the voltage amplification and the current amplification. Assume the temperature to be 20°C.

Answer: RIN1 = 1166, RIN2, = 1166. Av = 8408 and Ai = 4383

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