Amplifier Output Shunt Circuit for Lower DC Power Loss
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Solution Overview
Problem
Amplifiers in radio communication devices face challenges in achieving high gain, linearity, bandwidth, power efficiency, and power consumption, particularly in wideband and millimeter-wave communication, with stacked amplifiers leading to degraded linearity and increased power consumption.
Innovation Solution
The use of a shunt circuit to divide and shunt a portion of the direct current component of the output signal in an amplifier circuit, reducing power consumption and improving efficiency while maintaining linearity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If stacked amplifiers are used to increase power output, then power is improved, but linearity deteriorates
Solution Approach 1:
The amplifier output stage is segmented into multiple parallel amplifier branches rather than using a single stacked amplifier. Each branch processes a portion of the signal, and their outputs are combined. This segmentation maintains linearity by avoiding the cascaded gain multiplication effect of stacked amplifiers while still achieving high power output through parallel current summation.
Solution Approach 2:
The invention transitions from a vertical stacking architecture (series connection of amplifiers to multiply gain) to a horizontal parallel architecture (parallel connection of amplifiers to sum currents). This dimensional change in circuit topology allows simultaneous achievement of high power output and maintained linearity, as the parallel branches independently process signals without cumulative non-linear distortion.
2Power
If stacked amplifiers are used to increase power output, then power is improved, but power consumption increases
Solution Approach 1:
The total power consumption is segmented and distributed across multiple parallel amplifier branches rather than being concentrated in stacked amplifiers. Each branch operates at optimized power levels with independent biasing, allowing the system to achieve high total power output through efficient current summation while minimizing overall power consumption through parallel architecture benefits.
3Power
If traditional amplifiers are used to increase signal power, then power is improved, but direct current components increase power consumption
Solution Approach 1:
The invention extracts and removes the direct current (DC) component from the amplifier output signal using a DC blocking capacitor or coupling arrangement. By separating the AC signal component from the DC bias component, the system can deliver high signal power to the load while preventing excessive DC current from being dissipated, thereby reducing unnecessary power consumption and improving overall efficiency.
Data Source
AI summary
Amplifier circuits, radio communication circuits, radio communication devices, and methods provided in this disclosure. The amplifier circuit may include an amplifier configured to amplify an input signal to provide an output signal. The output signal of the amplifier may include a direct current (DC) signal. The amplifier circuit may further include a current source coupled to the amplifier. The current source may be configured to receive an electrical supply. The current source may further be configured to divide the direct current (DC) signal of the output signal based on the electrical supply.