Amplifier circuit

JP2025005592APending Publication Date: 2025-01-17MURATA MFG CO LTD

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Patent Information

Application Number: JP2023105817
Authority / Receiving Office: JP · JP
Patent Type: Applications
Current Assignee / Owner
Filing Date: 2023-06-28
Publication Date: 2025-01-17

Application Information

Patent Timeline

28 Jun 2023

Application

JP2023105817

17 Jan 2025

Publication

JP2025005592A

IPC: H03F1/02; H03F3/24; H03F3/68

CPC: H03F1/0288; H03F1/565; H03F1/32; H03F3/19; H03F3/21; H03F3/602; H03F2200/192; H03F2200/451

Inventors: 徳田郁実

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AI Technical Summary

Technical Problem

In Doherty amplifier circuits, non-ideal load impedance at the output terminal of the carrier amplifier leads to power efficiency deterioration and signal distortion due to leakage of the peak amplifier's output signal.

Method used

Incorporating a phase shift circuit and an auxiliary amplifier to invert the phase of the peak amplifier's output signal, canceling it with the carrier amplifier's output signal at the output terminal, thereby preventing leakage and improving power efficiency and linearity.

Benefits of technology

The proposed solution enhances power efficiency and suppresses signal distortion by effectively combining the signals, maintaining consistent gain and reducing leakage, thus improving the overall performance of the Doherty amplifier circuit.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a Doherty amplifier circuit that can improve power efficiency and reduce signal distortion.SOLUTION: An amplifier circuit 10 includes: a carrier amplifier 11 connected between a signal input terminal 120 and a signal output terminal 110; a peak amplifier 21 connected between the signal input terminal 120 and the signal output terminal 110; a phase shift line 43 connected between the carrier amplifier 11 and the signal output terminal 110; an auxiliary amplifier 22 connected between the signal input terminal 120 and an input end of the carrier amplifier 11; and phase shift lines 41 and 42 connected between the signal input terminal 120 and the input end of the carrier amplifier 11, and configured to invert the phase of the output signal of the auxiliary amplifier 22 at the signal output terminal 110 with respect to the phase of the output signal of the peak amplifier 21 at the signal output terminal 110.SELECTED DRAWING: Figure 1

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Citation Information

Patent Citations

Doherty amplifier
JP2016127568A