Filter, integrated passive device, electronic device and display apparatus

1 . A filter, applied in a field of radio frequency and comprising: 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.

2 . The filter according to claim 1 , comprising: a second band-stop filter circuit;

the high-pass filter circuit is coupled to the second port through the second band-stop filter circuit; and

the second band-stop filter circuit is coupled to the second port, and is configured to perform out-of-band suppression on the third signal passed by the high-pass filter circuit and input a signal subjected to out-of-band suppression to the second port.

3 . The filter according to claim 1 , wherein the band-pass filter circuit comprises: a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a first inductor, a second inductor, and a ground terminal;

a first electrode of the first capacitor is coupled to the low-pass filter circuit, and a second electrode of the first capacitor is coupled to a first electrode of the second capacitor;

a second electrode of the second capacitor is coupled to a first electrode of the third capacitor;

a second electrode of the third capacitor is coupled to a first electrode of the fourth capacitor;

a second electrode of the fourth capacitor is coupled to the high-pass filter circuit;

a first electrode of the fifth capacitor is coupled to the first electrode of the third capacitor, and a second electrode of the fifth capacitor is coupled to a second electrode of the sixth capacitor;

a first electrode of the sixth capacitor is coupled to the second electrode of the third capacitor;

a first electrode of the seventh capacitor is coupled to the second electrode of the fifth capacitor, and a second electrode of the seventh capacitor is coupled to a first electrode of the eighth capacitor;

a second electrode of the eighth capacitor is coupled to the ground terminal;

a first electrode of the first inductor is coupled to the first electrode of the first capacitor, and a second electrode of the first inductor is coupled to the second electrode of the first capacitor; and

a first electrode of the second inductor is coupled to the second electrode of the sixth capacitor, and a second electrode of the second inductor is coupled to the first electrode of the eighth capacitor.

4 . The filter according to claim 1 , wherein the band-pass filter circuit comprises: a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a third inductor, a fourth inductor, a fifth inductor, and a ground terminal;

a first electrode of the ninth capacitor is coupled to the low-pass filter circuit, and a second electrode of the ninth capacitor is coupled to a first electrode of the tenth capacitor;

a second electrode of the tenth capacitor is coupled to the high-pass filter circuit;

a first electrode of the eleventh capacitor is coupled to the first electrode of the ninth capacitor, and a second electrode of the eleventh capacitor is coupled to a first electrode of the twelfth capacitor;

a second electrode of the twelfth capacitor is coupled to the ground terminal;

a first electrode of the thirteenth capacitor is coupled to the second electrode of the ninth capacitor, and a second electrode of the thirteenth capacitor is coupled to a first electrode of the fourteenth capacitor;

a second electrode of the fourteenth capacitor is coupled to the ground terminal;

a first electrode of the third inductor is coupled to the first electrode of the twelfth capacitor, and a second electrode of the third inductor is coupled to the second electrode of the twelfth capacitor;

a first electrode of the fourth inductor is coupled to the first electrode of the fourteenth capacitor, and a second electrode of the fourth inductor is coupled to the second electrode of the fourteenth capacitor; and

a first electrode of the fifth inductor is coupled to the first electrode of the tenth capacitor, and a second electrode of the fifth inductor is coupled to the second electrode of the tenth capacitor.

5 . The filter according to claim 1 , wherein the band-pass filter circuit comprises: a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor, a twenty-third capacitor, a twenty-fourth capacitor, a twenty-fifth capacitor, a twenty-sixth capacitor, a twenty-seventh capacitor, a twenty-eighth capacitor, a sixth inductor, a seventh inductor, an eighth inductor, a ninth inductor, a tenth inductor, and a ground terminal;

a first electrode of the fifteenth capacitor is coupled to the low-pass filter circuit, and a second electrode of the fifteenth capacitor is coupled to a first electrode of the sixteenth capacitor;

a second electrode of the sixteenth capacitor is coupled to a first electrode of the seventeenth capacitor;

a second electrode of the seventeenth capacitor is coupled to a first electrode of the eighteenth capacitor;

a second electrode of the eighteenth capacitor is coupled to a first electrode of the nineteenth capacitor;

a second electrode of the nineteenth capacitor is coupled to a first electrode of the twentieth capacitor

a second electrode of the twentieth capacitor is coupled to the high-pass filter circuit;

a first electrode of the twenty-first capacitor is coupled to the first electrode of the seventeenth capacitor, and a second electrode of the twenty-first capacitor is coupled to a second electrode of the twenty-second capacitor;

a first electrode of the twenty-second capacitor is coupled to the second electrode of the seventeenth capacitor;

a first electrode of the twenty-third capacitor is coupled to the second electrode of the twenty-first capacitor, and a second electrode of the twenty-third capacitor is coupled to a first electrode of the twenty-fourth capacitor;

a second electrode of the twenty-fourth capacitor is coupled to the ground terminal;

a first electrode of the twenty-fifth capacitor is coupled to the second electrode of the eighteenth capacitor, and a second electrode of the twenty-fifth capacitor is coupled to a first electrode of the twenty-sixth capacitor;

a second electrode of the twenty-sixth capacitor is coupled to the ground terminal;

a first electrode of the twenty-seventh capacitor is coupled to the second electrode of the nineteenth capacitor, and a second electrode of the twenty-seventh capacitor is coupled to a first electrode of the twenty-eighth capacitor;

a second electrode of the twenty-eighth capacitor is coupled to the ground terminal;

a first electrode of the sixth inductor is coupled to the first electrode of the fifteenth capacitor, and a second electrode of the sixth inductor is coupled to the second electrode of the fifteenth capacitor;

a first electrode of the seventh inductor is coupled to the second electrode of the twenty-second capacitor, and a second electrode of the seventh inductor is coupled to the first electrode of the twenty-fourth capacitor;

a first electrode of the eighth inductor is coupled to the first electrode of the twenty-sixth capacitor, and a second electrode of the eighth inductor is coupled to the second electrode of the twenty-sixth capacitor;

a first electrode of the ninth inductor is coupled to the first electrode of the twenty-eighth capacitor, and a second electrode of the ninth inductor is coupled to the second electrode of the twenty-eighth capacitor; and

a first electrode of the tenth inductor is coupled to the first electrode of the twentieth capacitor, and a second electrode of the tenth inductor is coupled to the second electrode of the twentieth capacitor.

6 . The filter according to claim 1 , wherein the first band-stop filter circuit comprises: a twenty-ninth capacitor, and an eleventh inductor;

a first electrode of the twenty-ninth capacitor is coupled to the first port, and a second electrode of the twenty-ninth capacitor is coupled to the low-pass filter circuit; and

a first electrode of the eleventh inductor coupled to the first electrode of the twenty-ninth capacitor, and the second electrode of the eleventh inductor coupled to the second electrode of the twenty-ninth capacitor.

7 . The filter according to claim 2 , wherein the second band-stop filter circuit comprises: a thirtieth capacitor, and a twelfth inductor;

a first electrode of the thirtieth capacitor is coupled to the high-pass filter circuit, and a second electrode of the thirtieth capacitor is coupled to the second port; and

a first electrode of the twelfth inductor coupled to a first electrode of the thirtieth capacitor, and a second electrode of the twelfth inductor coupled to the second electrode of the thirtieth capacitor.

8 . The filter according to claim 1 , wherein the low-pass filter circuit comprises: a thirty-first capacitor, a thirty-second capacitor, a thirty-third capacitor, a thirty-fourth capacitor, a thirty-fifth capacitor, a thirty-sixth capacitor, a thirty-seventh capacitor, a thirteenth inductor, and a ground terminal;

a first electrode of the thirty-first capacitor is coupled to the first band-stop filter circuit, and a second electrode of the thirty-first capacitor is coupled to a first electrode of the thirty-second capacitor;

a second electrode of the thirty-second capacitor is coupled to a first electrode of the thirty-third capacitor;

a second electrode of the thirty-third capacitor is coupled to the band-pass filter circuit;

a first electrode of the thirty-fourth capacitor is coupled to the first electrode of the thirty-second capacitor, and a second electrode of the thirty-fourth capacitor is coupled to a second electrode of the thirty-fifth capacitor;

a first electrode of the thirty-fifth capacitor is coupled to the second electrode of the thirty-second capacitor;

a first electrode of the thirty-sixth capacitor is coupled to the second electrode of the thirty-fourth capacitor, and a second electrode of the thirty-sixth capacitor is coupled to a first electrode of the thirty-seventh capacitor;

a second electrode of the thirty-seventh capacitor is coupled to the ground terminal; and

a first electrode of the thirteenth inductor is coupled to the second electrode of the thirty-fifth capacitor, and a second electrode of the thirteenth inductor is coupled to the first electrode of the thirty-seventh capacitor.

9 . The filter according to claim 2 , wherein the high-pass filter circuit comprises: a thirty-eighth capacitor, a thirty-ninth capacitor, a fortieth capacitor, a forty-first capacitor, a forty-second capacitor, a fourteenth inductor, a fifteenth inductor, and a ground terminal;

a first electrode of the thirty-eighth capacitor is coupled to the band-pass filter circuit, and a second electrode of the thirty-eighth capacitor is coupled to the second band-stop filter circuit;

a first electrode of the thirty-ninth capacitor is coupled to the first electrode of the thirty-eighth capacitor, and a second electrode of the thirty-ninth capacitor is coupled to a first electrode of the fortieth capacitor;

a second electrode of the fortieth capacitor is coupled to the ground terminal;

a first electrode of the forty-first capacitor is coupled to the second electrode of the thirty-eighth capacitor, and a second electrode of the forty-first capacitor is coupled to a first electrode of the forty-second capacitor;

a second electrode of the forty-second capacitor is coupled to the ground terminal;

a first electrode of the fourteenth inductor is coupled to the first electrode of the fortieth capacitor, and a second electrode of the fourteenth inductor is coupled to the second electrode of the fortieth capacitor; and

a first electrode of the fifteenth inductor is coupled to the first electrode of the forty-second capacitor, and a second electrode of the fifteenth inductor is coupled to the second electrode of the forty-second capacitor.

10 . The filter according to claim 1 , wherein a capacitance value of each of the capacitors in the filter is in a range of 0.1-10 pF.

11 . The filter according to claim 1 , wherein an inductor value of each of the inductors in the filter is in a range of 0.1-10 nH.

12 . The filter according to claim 1 , wherein the filter is formed on a glass substrate.

13 . The filter according to claim 1 , wherein the filter is a high frequency filter.

14 . 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.

15 . 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.

16 . A display apparatus, comprising the electronic device according to claim 15 .