Band-pass filter circuit, band-pass filter chip and radio frequency front-end module

• Main Authors: WANG JIAN, SUN BOWEN, YU CONG, SHENG CHAOYUN, ZHAO KUNLI
• Format: Patent
• Language: Chinese; English
• Published: 01.08.2023
• Subjects: BASIC ELECTRONIC CIRCUITRY; ELECTRICITY; IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS

The utility model provides a band-pass filter circuit, a band-pass filter chip and a radio frequency front-end module. The band-pass filter circuit comprises a series circuit, a first parallel circuit, a second parallel circuit and a third parallel circuit, and the series circuit comprises a first series resonator, a first coupling capacitor, a second coupling capacitor and a second series resonator which are sequentially connected in series. The first series resonator comprises a first series inductor and a first series reconfigurable capacitor which are connected in parallel, and the second series resonator comprises a second series inductor and a second series reconfigurable capacitor which are connected in parallel; the first parallel circuit comprises a first parallel reconfigurable capacitor and a first parallel resonator which are connected in series; the second parallel circuit comprises a second parallel reconfigurable capacitor and a second parallel resonator which are connected in series; and the t