Power amplifier circuit
The power amplifier circuit addresses gain instability due to temperature changes by using a transistor-diode configuration and constant voltage generation, enhancing gain stability and reducing power consumption.
JP2026011787APending Publication Date: 2026-01-23MURATA MFG CO LTD
Patent Information
- Application Number
- JP2024112670
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2026-01-23
Smart Images
Figure 2026011787000001_ABST
Abstract
To provide a power amplifier circuit capable of appropriately compensating a gain change of an amplifier when a temperature rises.SOLUTION: A first transistor including a collector or a drain to which power is supplied from a second terminal, an emitter or a source that supplies a bias to the amplifier through a first resistance element, and a base or a gate connected to a control terminal, a first diode including an anode connected to the control terminal and a cathode, and a second diode including an anode connected to the cathode of the first diode and a cathode connected to a ground; A second transistor having a collector or a drain connected to the first terminal through a second resistive element, a base or a gate, and an emitter or a source connected to the anode of the second diode, and a constant voltage generation circuit configured to supply a constant voltage to the base or the gate of the second transistor.SELECTED DRAWING: Figure 1
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Citation Information
Patent Citations
Radio frequency amplifier and operating point stabilizing method
JP1999330866A