Amplifier circuit and method of amplifying a signal in an amplifier circuit

摘要

An amplifier circuit, comprising: an input, for receiving an input signal to be amplified; a power amplifier, for amplifying the input signal; a switched power supply, having a switching frequency, for providing at least one supply voltage to the power amplifier; and a dither block, for dithering the switching frequency of the switched power supply. The dither block is controlled based on the input signal. Another aspect of the invention involves using first and second switches, each having different capacitances and resistances, and using the first or second switch depending on the input signal or volume signal. Another aspect of the invention involves controlling a bias signal provided to one or more components in the signal path based on the input signal or volume signal.

主权项

1. An amplifier circuit, comprising:
an input, for receiving a digital input signal to be amplified; a playback path comprising one or more components, for receiving the input signal and amplifying the input signal; and a bias generator for generating at least one bias and providing the at least one bias to at least one of the one or more components in the playback path; wherein the at least one bias supplied by the bias generator is controlled based on the input signal; and wherein said one or more components comprises a digital-to-analog converter (DAC) for converting the digital input signal to analog, said DAC being provided with said at least one bias.