The pop noise removal circuit and the pop noise removal method in the digital audio amplifier which uses double power source

摘要

Topic Being simple in the digital audio amplifier which uses double power source, at the same time, price being inexpensive, the pop noise removal circuit and the pop noise removal method where it can materialize easily on the semiconductor chip are disclosed.Solutions Until recently, using relay, it removed pop noise, but, in the pop noise removal circuit which relates to this invention, using the small-numbered individual electronic device, it can remove pop noise. The pop which relates to this inventionAs for the noise removal circuit the case of power source impression and cancellation, the electrical switch, namely, being the system which controls the gate voltage of the power MOS transistor, structure being simple, there is a merit that integration is easy on the semiconductor chip.