Patent ID: 9337829
Filing Date: 2016-05-10
CPC Classification: H03F,H03K

Claim Text:
1. An electronic device comprising: a digital data transmission stage having at least a first output terminal operative to provide a first digital signal having a voltage value corresponding to one of a first reference voltage or a second reference voltage, the digital data transmission stage being arranged to operate when a function as a digital data transmission mode is selected; an audio signal amplification stage comprising at least a first amplifier having a first output stage comprising a PMOS transistor and an NMOS transistor connected in series with one another between a third reference voltage and a fourth reference voltage, the audio signal amplification stage being arranged to operate when a function as an audio signal amplification mode is selected, at least a first biasing circuit of the body terminal of the PMOS transistor of said first output stage; wherein the first biasing circuit, when the function as a digital data transmission mode is selected, is arranged to supply to the body terminal of the PMOS transistor of the first output stage a biasing voltage corresponding to the highest between the voltage value of the output signal and the third reference voltage of the electronic device; and wherein the first biasing circuit is further arranged, when the function as an audio signal amplification mode is selected, to supply to the body terminal of the PMOS transistor of the first output stage a biasing voltage corresponding to the third reference voltage of the electronic device.