The two bluish circles labeled NPN and PNP are the transistor output devices. The squiggly lines are resistors that you can ignore. Note how the top transistor (TR1) handles what's labeled as the "positive half-cycle", the bottom transistor the "negative half-cycle".
The input signal in this illustration is a simple sine wave. The circuit breaks the sine wave apart and divides the reproduction duties between the two devices.
What you are looking at is a Class B circuit. No Class A'ness to it at all.
More tomorrow.
How much is enough?
The two bluish circles labeled NPN and PNP are the transistor output devices. The squiggly lines are resistors that you can ignore. Note how the top transistor (TR1) handles what's labeled as the "positive half-cycle", the bottom transistor the "negative half-cycle".
The input signal in this illustration is a simple sine wave. The circuit breaks the sine wave apart and divides the reproduction duties between the two devices.
What you are looking at is a Class B circuit. No Class A'ness to it at all.
More tomorrow.
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