Digital Amplifier Switching Control for Idle Power Reduction
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Solution Overview
Problem
Digital power amplifiers consume power even when no signal is input, leading to unnecessary power loss due to switching operations.
Innovation Solution
A digital amplifier design that includes a switching unit, a driving unit, an input signal detection unit, and a control unit to initiate and stop switching operations only when a signal is present, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If switching operations are continuously performed in a digital amplifier, then signal amplification function is maintained, but power consumption increases unnecessarily when no signal is input
Solution Approach 1:
The patent applies dynamics by making the switching operation state changeable based on input signal presence. The amplifier dynamically transitions between switching operation mode (when signal is present) and non-switching mode (when no signal is present), allowing the system to adapt its behavior to current operating conditions and optimize power consumption accordingly
Solution Approach 2:
The patent implements self-service through automatic detection of input signal presence by the control unit. The system automatically determines whether to perform switching operations based on its own sensing of the input signal, eliminating the need for external control and enabling autonomous power optimization
2Use of energy by moving object
If switching operations are stopped when no signal is input, then power consumption is reduced, but response time may be delayed when signal is subsequently input
Solution Approach 1:
The patent applies preliminary action by maintaining the switching unit in a ready state with power supplied to it even when no signal is input. This preliminary preparation ensures that when a signal is subsequently detected, the switching unit can immediately commence switching operations without delay, while still allowing power consumption to be optimized during idle periods
Data Source
AI summary
A digital amplifier comprises: a switching unit that amplifies a signal input to the digital amplifier by performing a switching operation; a driving unit that turns the switching unit on and off; an input signal detection unit that detects an input signal to the digital amplifier; and a first control unit that performs control such that the switching unit starts a switching operation by starting driving of the driving unit, when the digital amplifier is changed to a signal input state and the input signal detection unit detects an input signal, and performs control such that the switching unit stops the switching operation by stopping the driving of the driving unit, when the digital amplifier is changed to a no signal input state and the input signal detection unit does not detect an input signal. This configuration enables to reduce power consumption when no signal is input.