Digital Power Amplifier Reference Signal Generator
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Solution Overview
Problem
Mobile electronic devices, particularly wireless communication devices, face high power consumption due to unnecessary switching in digital logic circuits of power amplifiers, leading to increased energy usage and heat dissipation even when not actively transmitting signals.
Innovation Solution
Implementing a power amplifying apparatus with a reference signal generator that alternates between enabling and disabling states, preventing unnecessary switching by providing static signals during the disabling state, thereby reducing power consumption in digital power amplifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the digital logic circuit continues to switch during disabling state to maintain signal processing capability, then the device can quickly resume transmission, but power consumption increases due to unnecessary switching
Solution Approach 1:
The patent applies dynamics by making the input signal state dynamic rather than static during disabling periods. The system transitions from a fixed non-zero signal to a time-varying signal that alternates between zero and non-zero values, allowing the digital logic circuit to periodically rest while maintaining the ability to quickly resume normal operation when needed.
Solution Approach 2:
The patent implements periodic action by applying a periodic signal to the input of the digital power amplifier during the disabling state. This periodic signaling creates regular intervals where the amplifier can remain inactive (reducing power consumption) while still maintaining system readiness through the periodic nature of the signal, allowing quick resumption when the period elapses.
2Reliability
If the digital power amplifier processes signals continuously, then transmission quality is maintained, but unnecessary power is consumed during non-transmission periods
Solution Approach 1:
The patent extracts the essential function of signal processing only when needed. By applying a periodic signal during disabling state, the system separates the maintenance function (keeping the amplifier ready) from the active processing function, allowing the amplifier to be turned off or idle during non-transmission periods while maintaining transmission quality when active.
Solution Approach 2:
The patent changes the parameter of the input signal from a continuous non-zero value to a periodic signal with varying amplitude or presence. This parameter change allows the digital power amplifier to operate efficiently by processing signals only when the periodic indication warrants transmission, thereby reducing energy waste during non-transmission periods while maintaining reliability.
3Productivity
If the multiplexer switches between in-phase and quadrature-phase signals at high frequency, then data transmission rate is improved, but the digital logic circuit consumes more power due to increased switching activity
Solution Approach 1:
The patent applies periodic action at the data transmission level by using periodic signaling during disabling states. This allows high-frequency switching to occur only when necessary for actual data transmission, while during non-transmission periods, the periodic disabling signal reduces logic circuit switching activity, thereby lowering power consumption without sacrificing data transmission rate when active.
Solution Approach 2:
The patent introduces dynamics by making the signal transmission pattern adaptive rather than continuous. The system dynamically adjusts between active high-frequency switching for data transmission and inactive or reduced switching during disabling periods, optimizing the balance between productivity and power consumption based on actual transmission needs.
Data Source
AI summary
A power amplifying apparatus is provided. A reference signal generator provides a reference signal having an enabling state and a disabling state. A digital power amplifier generates a current based on the reference signal and an input signal. An output signal of the digital power amplifier is related to the current. When the reference signal is in the enabling state, the current is related to the input signal. When the reference signal is in the disabling state, the current is irrelevant to the input signal. During the enabling state of the reference signal, a data generator provides an output alternating between an in-phase signal and a quadrature-phase signal as the input signal to the digital power amplifier. When the reference signal is in the disabling state, the data generator provides a fixed signal as the input signal to the digital power amplifier.