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Engineering and Tech / Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) 7 / Chapter 7 / Problem 7.51

Microelectronic Circuits (The Oxford Series in Electrical and Computer Engineering) | 7th Edition | ISBN: 9780199339136 | Authors: Adel S. Sedra, Kenneth C. Smith

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Figure P7.51 shows a transistor with the collector connected to the base. The bias

Chapter 7, Problem 7.51

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QUESTION:

Figure P7.51 shows a transistor with the collector connected to the base. The bias arrangement is not shown. Since a zero \(v_{BC}\) implies operation in the active mode, the BJT can be replaced by one of the small-signal models of Figs. 7.24 and 7.26. Use the model of Fig. 7.26(b) and show that the resulting two-terminal device, known as a diode-connected transistor, has a small-signal resistance \(r\) equal to \(r_e\).

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QUESTION:

Figure P7.51 shows a transistor with the collector connected to the base. The bias arrangement is not shown. Since a zero \(v_{BC}\) implies operation in the active mode, the BJT can be replaced by one of the small-signal models of Figs. 7.24 and 7.26. Use the model of Fig. 7.26(b) and show that the resulting two-terminal device, known as a diode-connected transistor, has a small-signal resistance \(r\) equal to \(r_e\).

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