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.[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 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
- LM4910 by National Semiconductor
- Lab tutorial on OCL amplifier from Hong Kong Polytechnic University
References
- ^ OCL Amplifier Explainedhomemade-circuits.Received on January 19, 2023
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