1. Common-Collector Amplifier Section 13.1-13.4

2. A note about Human Ear Human can hear between 12 Hz and 20 KHz. The range begins to shrink at the age of 8 with high frequency fading.

3. VB1/VS Matlab0.7304 ADS0.73 Measurement0.734 Vs,pp=100 mV, Freq=1 KHz

4. VB1/VS Matlab-13.963 ADS-14.9 Measurement-14 Vs,pp=100 mV, Freq=1 KHz mV

5. Vs,pp=100 mV Slight mismatch Bias current of Q2=13 mA 13 mA x 8 Ohms=104 mV

6. Apply a small Signal (Vpp=30 mV) VB1/VS Matlab--11.17 ADS-8.266 Measurement-8

7. Increase the Input Frequency Vout/Vs 1 K-8 1 MHz-7.21 2 MHz-5.26 3 MHz-4.32 3dB BW=1.9 MHz

8. Typical Audio Signal Limited output Swing

9. Audio Plug

10. Power Dissipation of Q1 Assumption: The instantaneous power dissipated by Q1:I C V CE Average Power

11. Power Dissipation of the Current Source

12. Efficiency

13. Efficiency of Emitter Follower Pdiss of Q1: Pdiss of I1: Total power wasted in Q1 and I1: Output power:

14. Improved Push-Pull Stage

15. DC Bias

16. Voltage Gain

17. Output Impedance