single supply headphone amp with noise cancelling

142

02:00:38

a single supply headphone amplifier (top) with a noise cancellation circuit (bot).
the circuit could be driven by an 3V Li battery or two 1.5 V normal batterys.

the bottom circuit is an allpass filter used to invert the input which is than added to the output.
In real application a delay circuit would lead to better cancellation (you have to put your signal in the right phase to the noise).
This circuit could be used in DIY Headphones.

published 6 years ago

zorgrian

4 years ago

Zero dB gain and it amplifies up to GHz

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