Fig. 6.61 shows an alternate scheme for biasing the NE5234 output stage . Ignoring all base currents,

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Fig. 6.61 shows an alternate scheme for biasing the NE5234 output stage_.Ignoring all base currents, find |I_C74| I_C75. Use Fig. 6.42 for the relative emitter areas of all the transistors except assume that Q₄₆is identical to Q₄₃.

Figure 6.61

Vcc R65 R43 7.5 k2 1.3 k2 IREF = |!c36l – Ic35 7.4 μΑ Pbase Q64 Q43 Q74 Q68 25 Out 26 Q40 Q39 Q65 Оз7 R46 R40 R39.

Figure 6.42

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Analysis and Design of Analog Integrated Circuits

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Authors: Paul R. Gray, ‎ Paul J. Hurst Stephen H. Lewis, ‎ Robert G. Meyer

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Fig. 6.61 shows an alternate scheme for biasing the NE5234 output stage . Ignoring all base currents,

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Transistors Q 39 and Q 40 form a differential amplifier that operates in a negative feedback ...View the full answer

Analysis and Design of Analog Integrated Circuits

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