Circuits for improved audio signal reconstruction

摘要

An impedance matched resonant circuit uses inductors coupling an audio source and a speaker array in order to reduce feedback reflection induced by an audio signal traveling from the audio source to the array of speakers. An RC circuit could also be coupled to the positive and negative terminals of the speaker array to reduce the slope differential of the audio signal at certain frequencies. The circuit can be packaged together in a single module with switches to activate and deactivate portions of the circuit to alter the effectiveness of the circuit depending upon need.

主权项

1. A circuit configured to reduce quantization noise in an audio signal reconstructed from digitally encoded audio, comprising:
a first circuitry comprising a first inductor in series with a capacitor, both of which are in parallel with a second inductor, wherein the first circuitry is configured to be coupled to a positive terminal of an audio signal source and to a positive terminal of an array of speakers; and a second circuitry comprising a third inductor, wherein the second circuitry is configured to be coupled to a negative terminal of the audio signal source and to a negative terminal of the array of speakers, wherein the first inductor, the second inductor, the capacitor, and the third inductor are selected such that a Thevenin equivalent impedance of the first circuitry approximately matches the impedance of the second circuitry.