Audio amplifier based on current mirror circuit
The utility model discloses an audio amplifier based on a current mirror circuit. Comprising a positive power supply, a negative power supply, a positive balance differential signal end, a negative balance differential signal end, a signal conversion input circuit, a first Willison current mirror ci...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The utility model discloses an audio amplifier based on a current mirror circuit. Comprising a positive power supply, a negative power supply, a positive balance differential signal end, a negative balance differential signal end, a signal conversion input circuit, a first Willison current mirror circuit, a second Willison current mirror circuit, a third Willison current mirror circuit, a signal conversion output circuit and a signal output end. According to the utility model, a current mirror circuit architecture is adopted, audio signals output from the front end can be transmitted to the output end in a lossless manner, and the audio signals can be directly converted into voltage signals which are large enough by a grounding resistor at the output end without gain amplification, so that signals with low distortion and high signal-to-noise ratio are realized; meanwhile, the volume of the grounding resistor at the output end can be directly controlled by a potentiometer or a numerical control resistor.
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