POWER AMPLIFICATION MODULE, FRONT-END CIRCUIT, AND COMMUNICATION DEVICE
First Claim
1. A power amplification module comprising:
- a previous stage amplifier configured to amplify a high-frequency signal;
a posterior stage amplifier configured to amplify the high-frequency signal amplified by the previous stage amplifier; and
a variable filter circuit arranged between the previous stage amplifier and the posterior stage amplifier, and configured to vary a pass band or an attenuation band thereof based on a frequency band of the high-frequency signal, wherein;
the variable filter circuit comprises;
one or more filters, anda switch circuit configured to vary the pass band or the attenuation band of the variable filter circuit by switching a connection path through the one or more filters based on the frequency band of the high-frequency signal,the previous stage amplifier, the switch circuit, and the posterior stage amplifier are arranged on a mounting surface of a substrate, andthe one or more filters are stacked and arranged so as to overlap with at least one of the previous stage amplifier, the switch circuit, and the posterior stage amplifier when the substrate is viewed in a plan view.
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Accused Products
Abstract
A PA module includes a previous stage amplification element to amplify a high-frequency signal, a posterior stage amplification element to amplify the high-frequency signal amplified by the previous stage amplification element, and a variable filter circuit arranged between the previous stage amplification element and the posterior stage amplification element and to vary a pass band and an attenuation band in accordance with a frequency band of the high-frequency signal, in which the variable filter circuit includes a filter portion and switches, the previous stage amplification element, the switches, and the posterior stage amplification element are arranged on a mounting surface of a substrate, the filter portion is stacked and arranged so as to overlap with at least one of the previous stage amplification element, the switches, and the posterior stage amplification element when the substrate is viewed in a plan view.
17 Citations
14 Claims
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1. A power amplification module comprising:
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a previous stage amplifier configured to amplify a high-frequency signal; a posterior stage amplifier configured to amplify the high-frequency signal amplified by the previous stage amplifier; and a variable filter circuit arranged between the previous stage amplifier and the posterior stage amplifier, and configured to vary a pass band or an attenuation band thereof based on a frequency band of the high-frequency signal, wherein; the variable filter circuit comprises; one or more filters, and a switch circuit configured to vary the pass band or the attenuation band of the variable filter circuit by switching a connection path through the one or more filters based on the frequency band of the high-frequency signal, the previous stage amplifier, the switch circuit, and the posterior stage amplifier are arranged on a mounting surface of a substrate, and the one or more filters are stacked and arranged so as to overlap with at least one of the previous stage amplifier, the switch circuit, and the posterior stage amplifier when the substrate is viewed in a plan view. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification