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Analysis of the OCL power amplifier circuit in the audio power amplifier circuit.

Hardware design
August 11, 2020 by Boston 1519

I have already understood the OTL circuit. Baidu Encyclopedia said that this is an upgrade of the OTL circuit, eliminating the need for output amplifier capacitors, making the system's low-frequency response smoother. I hope you can help me analyze this circuit.

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Farrah Posted on August 11, 2020

R6 is not current-limiting, it is mainly shunting, and it divides the current of the base of Q6 and Q7.

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Roland Posted on August 11, 2020

R7 and R8 can be regarded as current limiting, connected to the emitter to limit the collector current.

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Nixon Posted on August 11, 2020

D1 and D2 are not only the function of eliminating crossover distortion, but also temperature compensation.

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