Hybrid Power Supply Circuit With Delay Compensation Synchronization
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Solution Overview
Problem
Existing power supply circuits face efficiency degradation when amplifying high-speed signals due to operation delays in the amplification route, particularly affecting the coordination between switching and linear amplifiers, leading to reduced output power and overall efficiency.
Innovation Solution
A power supply circuit with a delay device to pre-delay the input signal, a current detector to monitor output current, and a predicted signal generation circuit to synchronize the output currents of the linear and switching amplifiers, reducing the effect of delays and ensuring near-ideal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a switching amplifier is used to amplify the amplitude signal with high efficiency, then power efficiency is improved, but operation delay occurs in the amplification route causing coordination errors between amplifiers
Solution Approach 1:
The patent applies preliminary action by delaying the input signal before it enters the switching amplifier. The delay device pre-delays the amplitude signal by a predetermined time that matches the total operation delay of the amplification route (current detector + predicted signal generation circuit + switching amplifier). This allows the switching amplifier to process a signal that is already timed to compensate for the delays it and subsequent circuits will introduce, ensuring synchronized operation with the linear amplifier without requiring real-time delay compensation.
2Speed
If the amplification route is simplified to reduce delay, then operation speed is improved, but power efficiency decreases due to increased linear amplifier operation
Solution Approach 1:
The patent resolves this contradiction by applying preliminary action through the delay device that pre-delays the input signal. This allows the system to maintain the full amplification route (current detector + predicted signal generation circuit + switching amplifier) without simplification, because the pre-delay compensates for the inherent delays in these circuits. The linear amplifier and switching amplifier can operate in coordinated fashion with their respective delay characteristics, maintaining high power efficiency while achieving the required operation speed through proper timing synchronization.
3Device complexity
If delay compensation is not applied, then device complexity is reduced, but output power decreases due to coordination errors between amplifiers
Solution Approach 1:
The patent applies preliminary action by introducing a delay device that pre-delays the input signal to the switching amplifier. This simple timing adjustment compensates for the operation delays in the amplification route, enabling the switching amplifier to operate in coordination with the linear amplifier. The pre-delay ensures that the amplitude signal and carrier signal are properly synchronized at the output, maintaining high output power without requiring complex delay compensation circuits or feedback mechanisms.
Data Source
AI summary
In a power supply circuit which uses a switching amplifier in combination with a linear amplifier, in order to be capable of correcting errors of operation of the switching amplifier and the linear amplifier, that is to say, in order to cause the switching amplifier and the linear amplifier to operate in coordination in a near-ideal state, the power supply circuit is provided with first amplification unit for delaying an input signal by a predetermined set time and amplifying the input signal, current detection unit for detecting a current value of an output signal of the first amplification unit, predicted signal generation unit for generating a pulse signal on a basis of an output signal of the current detection unit and the input signal, second amplification unit for amplifying the pulse signal and signal output unit for combining current of the output signal of the first amplification unit and current of the output signal of the second amplification unit to output the combined current, wherein the set time is time for reducing an effect of delay times generated at the current detection unit, the predicted signal generation unit and the second amplification unit.