AUTOMATIC LEVEL CONTROL CIRCUIT, SIGNAL SOURCE, SIGNAL SOURCE OUTPUT POWER CONTROL METHOD, AND STORAGE MEDIUM

摘要

The present application provides an automatic level control (ALC) circuit, a signal source, a signal source output power control method, and a storage medium. The ALC circuit comprises at least two stages of ALC loops; each stage of ALC loop comprises an amplifier, a coupler, a power detector, and an attenuation control module connected sequentially; an input end of the amplifier is an input node of the ALC loop, and an output end of the coupler is an output node of the ALC loop; an output end of the attenuation control module is connected to a control end of an adjustable attenuator, an input end of the adjustable attenuator is an input end of the ALC circuit, and an output end of the adjustable attenuator is connected to an input node of the first stage of ALC loop; and the output nodes of all stages of ALC loops other than the last stage of ALC loop are connected to a normally on end of a two-way single-on switch, a first gating end of the two-way single-on switch is connected to an input node of the next stage of ALC loop, and an output node of the last stage of ALC loop and a second gating end of each two-way single-on switch are both connected to an output end of the ALC circuit.