Patent ID: 11916529
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A matching circuit that performs output impedance matching for an amplifier, the matching circuit comprising:
a low pass filter comprising a shared ground and a plurality of parallel-connected capacitors, the plurality of parallel-connected capacitors being connected from a common node on a signal line to the shared ground, the low pass filter being configured to attenuate a second harmonic component of an amplified signal;
a high pass filter; and
a parallel resonant circuit connected to the high pass filter to receive the amplified signal with the second harmonic component attenuated, the parallel resonant circuit configured to attenuate a third harmonic component of an amplified signal,
wherein the shared ground of the plurality of parallel-connected capacitors of the low pass filter and a ground of the high pass filter are isolated from each other with a wiring pattern of the matching circuit therebetween, and
wherein the shared ground of the low pass filter and a ground of the amplifier are isolated from each other.