Filter, integrated passive device, electronic device and display apparatus

An integrated passive device, comprising a filter, wherein the filter is applied in a field of radio frequency and comprises:

• a first port, a second port, a first band-stop filter circuit, a low-pass filter circuit, a band-pass filter circuit, and a high-pass filter circuit;
• wherein
• the first band-stop filter circuit is coupled to the first port and is configured to perform out-of-band suppression on a signal input from the first port and input a signal subjected to the out-of-band suppression to the low-pass filter circuit;
• the low-pass filter circuit is configured to input a first signal of the signal input by the first band-stop filter circuit to the band-pass filter circuit, wherein the first signal has a frequency between a first frequency and a second frequency;
• the band-pass filter circuit is configured to input a second signal of the first signal input by the low-pass filter circuit to the high-pass filter circuit, wherein the second signal has a frequency between a third frequency and a fourth frequency;
• and
• the high-pass filter circuit is configured to pass through a third signal of the second signal input by the band-pass filter circuit, wherein the third signal has a frequency not less than the first frequency;
• wherein the first frequency is less than the second frequency;
• the third frequency is between the first frequency and the second frequency;
• and
• the fourth frequency is between the third frequency and the second frequency.

An electronic device, comprising an integrated passive device, wherein the integrated passive device comprises a filter, wherein the filter is applied in a field of radio frequency and comprises:

• a first port, a second port, a first band-stop filter circuit, a low-pass filter circuit, a band-pass filter circuit, and a high-pass filter circuit;
• wherein
• the first band-stop filter circuit is coupled to the first port and is configured to perform out-of-band suppression on a signal input from the first port and input a signal subjected to the out-of-band suppression to the low-pass filter circuit;
• the low-pass filter circuit is configured to input a first signal of the signal input by the first band-stop filter circuit to the band-pass filter circuit, wherein the first signal has a frequency between a first frequency and a second frequency;
• the band-pass filter circuit is configured to input a second signal of the first signal input by the low-pass filter circuit to the high-pass filter circuit, wherein the second signal has a frequency between a third frequency and a fourth frequency;
• and
• the high-pass filter circuit is configured to pass through a third signal of the second signal input by the band-pass filter circuit, wherein the third signal has a frequency not less than the first frequency;
• wherein the first frequency is less than the second frequency;
• the third frequency is between the first frequency and the second frequency;
• and
• the fourth frequency is between the third frequency and the second frequency.