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chapter 10 other bjt amplifiers common-collector common-base amp.

2. Objectives. Perform a complete dc analysis of an emitter follower.Describe the use of the emitter follower as a current amplifier and as a buffer.Perform a complete dc analysis of a common-base amplifier.Describe the use of the common-base amplifier as a voltage amplifier and a buffer.List the overall gain and impedance characteristics of all commonly used BJT amplifiers..

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chapter 10 other bjt amplifiers common-collector common-base amp.

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    1: 1 Chapter 10 Other BJT Amplifiers Common-Collector & Common-Base Amp. Pictures are redrawn (with some modifications) from Introductory Electronic Devices and Circuits By Robert T. Paynter

    2: 2

    3: 3 Fig 10.1 The emitter follower (common-collector amplifier).

    4: 4 Fig 10.2 Example 10.1.

    5: 5 Fig 10.3 Example 10.2.

    6: 6 Fig 10.5 Emitter follower and its ac equivalents.

    7: 7 Ai of CC Amp.

    8: 8 Example 10.5. Determine the input impedance of the amplifier shown in Figure 10.5a. Assume that the value of hfe for the transistor is listed on the spec sheet as 220.

    9: 9 Zout of CC Amp.

    10: 10 Fig 10.6 Example 10.6.

    11: 11 Applications for CC Amp. Current amplifier (Av 1) Buffer a circuit used to compensate for an impedance mismatch between a source and its load

    12: 12 Fig 10.12 Using a buffer to overcome an impedance mismatch.

    13: 13 Fig 10.14 Darlington emitter-follower. (1)

    14: 14 Fig 10.14 Darlington emitter-follower. (2)

    15: 15 Fig 10.16 Typical common-base amplifier.

    16: 16 Fig 10.17 The common-base ac equivalent circuit.

    17: 17 Fig 10.18 Example 10.10.

    18: 18 Common-Base Applications Voltage amplification without current gain High-frequency applications (more common)

    19: 19 BJT Amplifiers: A Summary

    20: 20 Summary The emitter-follower (common-collector amplifier.) Emitter-follower ac analysis. Emitter-follower applications. Darlington emitter-follower. The common-base amplifier and their applications.

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