Common-Collector Amplifier Section 13.1-13.4. A note about Human Ear Human can hear between 12 Hz and 20 KHz. The range begins to shrink at the age of.

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Presentation transcript:

Common-Collector Amplifier Section

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.

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

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

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

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

Increase the Input Frequency Vout/Vs 1 K-8 1 MHz MHz MHz dB BW=1.9 MHz

Typical Audio Signal Limited output Swing

Audio Plug

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

Power Dissipation of the Current Source

Efficiency

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

Improved Push-Pull Stage

DC Bias

Voltage Gain

Output Impedance