Low noise amplifier and apparatus including the same

A low noise amplifier comprising:

• a first amplifier stage including a first drive stage and a first gain stage, the first gain stage including a first-first gain block connected to a first input port and a first-second gain block connected to a second input port, the first drive stage being connected to a first load circuit and a second load circuit, the first drive stage being configured to receive an amplified first input signal from the first gain stage and transmit the received input signal to at least one of the first load circuit and the second load circuit;
• and
• a second amplifier stage including a second gain stage comprising a second gain block connected to the first input port and a second drive stage connected between the second gain stage and a second load circuit,
• wherein the low noise amplifier is configured to operate in a non-carrier aggregation mode, an inter-band carrier aggregation mode, or a non-contiguous intra-band carrier aggregation mode.

A low noise amplifier comprising:

• a first load circuit, a second load circuit, and a third load circuit;
• a first amplifier stage including a first gain stage configured to amplify a first input signal of a first input port or a second input signal of a second input port, a first-first drive stage configured to transmit an output of the first gain stage to the first load circuit, a first-second drive stage configured to transmit the output of the first gain stage to the second load circuit, and a first-third drive stage configured to transmit the output of the first gain stage to the third load circuit;
• a second amplifier stage including a second gain stage configured to amplify the second input signal of the second input port, and a second drive stage configured to transmit an output of the second gain stage to the second load circuit;
• and
• a third amplifier stage including a third gain stage configured to amplify the second input signal of the second input port, and a third drive stage configured to transmit an output of the third gain stage to the third load circuit,
• wherein in a non-contiguous intra-band carrier aggregation mode, based on the first input port or the second input port being enabled, at least two or more of the first to third amplifier stages are simultaneously enabled, and
• wherein in a non-carrier aggregation mode, the low noise amplifier is configured to transmit the first input signal, which is amplified in the first gain stage, to each of the first to third load circuits by selecting one of the first-first to first-third drive stages.