COMBINATION-TYPE AMPLIFIER WITH MULTIPLE POWER SOURCES

摘要

Disclosed is a combination-type amplifier with multiple power sources. The combination-type amplifier with multiple power sources according to the present invention includes a linear amplifying unit, a first sensing unit, a second sensing unit, a comparing unit, a gate driving unit, a switch unit, and a filter unit. The linear amplifying unit amplifies an input signal such that the input signal becomes identical with a feedback signal obtained by the feedback of an output signal, and outputs a linear current. The first sensing unit senses the linear current, and outputs a first sensed signal. The second sensing unit senses the output signal, and outputs a second sensed signal. The comparing unit compares the first sensed signal and a first reference signal and outputs a first control signal, and compares the second sensed signal and a second reference signal to an N-reference signal and outputs a second control signal to an N-control signal. The gate driving unit outputs a first driving control signal to an N-driving control signal in response to the first control signal to the N-control signal. The switch unit outputs a switching signal by switching and transferring a first power voltage to an N-power voltage in response to the first driving control signal to the N-driving control signal. The filter unit filters the switching signal, and outputs the output signal. The combination-type amplifier with multiple power sources according to the present invention varies the power to be supplied to the combination-type amplifier in accordance with the size of output voltage, thereby reducing loss of the linear amplifying unit and improving efficiency.