Signal integration circuit and electronic device

A signal integration circuit, suitable for a communication module and an external module, the signal integration circuit comprising:

• a first input port, coupled to an input signal, wherein the input signal comprises a high band signal and a non-high band signal, the non-high band signal comprises a low band signal, or comprises a low band signal and a first L1 band signal, and wherein the first L1 band signal has an overlapping band overlapping with a specific frequency in the low band signal;
• a second input port, coupled to the first L1 band signal, for inputting the first L1 band signal;
• a third input port, coupled to the first L5 band signal, for inputting the first L5 band signal;
• a fourth input port, coupled to the external module so as to input a second L1 band signal and a second L5 band signal, wherein the external module outputs the second L1 band signal and the second L5 band signal, a band of the second L1 band signal partially overlaps with a band of the first L1 band signal, and a band of the second L5 band signal partially overlaps with a band of the first L5 band signal;
• a first output port, coupled to the communication module, selectively outputting a first output signal and a second output signal, wherein the first output signal comprises the high band signal, the low band signal excluding a signal of the overlapping band, and the first L1 band signal, and the second output signal comprises the high band signal, the low band signal excluding the signal of the overlapping band, and the second L1 band signal;
• and
• a second output port, coupled to the communication module, selectively outputting the first L5 band signal and the second L5 band signal;
• wherein, when the fourth input port is not coupled to the external module, the first output port outputs the first output signal, and the second output port outputs the first L5 band signal.