RF Amplifier Supply RC Filtering for Discrete Voltage Ringing
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Solution Overview
Problem
The supply of multiple discrete voltages to amplifier circuits, as described in existing techniques, can degrade the amplification characteristics of these circuits.
Innovation Solution
An amplifier circuit and method that utilize a power amplifier and an RC series circuit, including a resistor and a capacitor connected in series between the ground and a voltage supply path, to attenuate ringing of discrete voltages and improve radio-frequency signal amplification characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If multiple discrete voltages are supplied to the power amplifier circuit in the ET mode, then the power-added efficiency (PAE) is improved, but the amplification characteristics are degraded
Solution Approach 1:
An RC series circuit is introduced as an intermediary component between the voltage supply path and the power amplifier. This RC circuit acts as a mediator that conditions the discrete voltages before they reach the amplifier, filtering out high-frequency noise and ringing while allowing the voltage switching functionality to remain. The resistor and capacitor work together to smooth the voltage transitions, thereby preserving amplification characteristics while maintaining the efficiency benefits of discrete voltage supply.
Solution Approach 2:
The RC series circuit uses simple, inexpensive passive components (resistor and capacitor) that can be easily replaced or adjusted. These components provide temporary conditioning of the voltage signals without requiring complex active circuitry, enabling cost-effective improvement of amplification characteristics while maintaining the discrete voltage supply approach for efficiency.
2Productivity
If multiple discrete voltages are supplied within one frame of the radio frequency signal, then the power amplifier efficiency is improved, but high-frequency noise and ringing are generated
Solution Approach 1:
The RC series circuit converts the harmful high-frequency noise and ringing generated by discrete voltage switching into beneficial effects. By filtering these noise components, the RC circuit transforms the problematic voltage transitions into clean, conditioned voltage signals that maintain the efficiency advantages of discrete voltage supply while eliminating the associated noise and ringing interference.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed solution effectively attenuates high-frequency noise, particularly ringing, thereby improving the quality of radio-frequency signals amplified using discrete voltages.
Implementation Method 1
an RC series circuit that includes a resistor and a first capacitor, which are connected in series between the ground and a voltage supply path between the tracker circuit and the power amplifier
Implementation Method 2
a first capacitor, which are connected in series between the ground and a voltage supply path
Data Source
AI summary
An amplifier circuit is provided for amplifying a radio frequency signal within one frame of a radio frequency signal by using multiple discrete voltages supplied from the tracker circuit. The amplifier circuit includes a power amplifier and an RC series circuit including a resistor and a capacitor that are connected in series between the ground and a voltage supply path between the tracker circuit and the power amplifier.