| 摘要 |
The present invention is related to a noise canceling earphone and driving circuit. The driving circuit integrates onto a single chip through system-on-a-chip (SOC) technology, an analog active noise cancellation (ANC) device (203), an audio preamplifier (204), a mixer and a bridge-tied load (BTL) audio amplifier (206). When implementing the technical solution of the present invention, since the SOC technology is adopted, the following beneficial effects can be obtained: (1) Introduction of new noise signals is prevented; (2) Attenuation and distortion of signals is prevented; (3) Layout of the analog ANC device is simplified such that wiring of the left earpiece and the right earpiece is reduced; (4) External components are reduced, thereby reducing cost; (5) The whole SOC circuit with active noise cancellation (ANC) functionality can be mounted within the earpieces of the earphone; and (6) It comes with application design in preventing time division multiple access noise interference in wireless communications using radio waves.
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