An OCL amplifier (output capacitor-less amplifier) is any audio amplifier with direct-coupled capacitorless output. Typically, OCL amplifiers can be any of several amplifier classes, and typically have a push-pull output stage.[1]

Advantages of OCL amplifiers over capacitor-coupled amplifiers include

  • Avoiding the cost and bulk of an output capacitor
  • better immunity to motorboat oscillation
  • larger output power at very low frequencies and DC

Disadvantages of OCL amplifiers include

  • larger power dissipation and passing DC through the load, in the minority of designs with poorly controlled DC bias point
  • increased sensitivity of the output DC bias point to process variations, although the last disadvantage is less important for older bipolar processes.

Implementations

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References

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  1. ^ OCL Amplifier Explainedhomemade-circuits.Received on January 19, 2023