OCL Amplifier

OCL Amplifier

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.

Advantages of OCL amplifiers over capacitor coupled amplifiers include

  • Avoiding the cost & 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 last disadvantage is less important for older bipolar processes.

OCL amplifer implementations


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