Audio Power Amplifier Circuit for Shared Speaker and Motor Drive
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing audio power amplifiers require two separate power amplifiers for audio and motor signals, leading to high power consumption and cost in electronic devices.
Innovation Solution
A driving circuit that integrates a transistor with a motor to form a combined body, connects a speaker in parallel with this body, and uses a single audio power amplifier to drive both the speaker and motor, reducing the need for a second power amplifier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two separate power amplifiers are used for audio and motor signals, then the audio signal processing and motor signal processing can be performed independently, but the power consumption and cost increase
Solution Approach 1:
The patent combines the audio power amplifier and motor power amplifier into a single integrated power amplifier circuit. The audio codec processes both audio signals and motor signals, and a single power amplifier amplifies both types of signals simultaneously. This merging eliminates the need for separate power amplifier hardware, reducing power consumption and device cost while maintaining independent processing capabilities through signal routing control.
Solution Approach 2:
The power amplifier is designed with multi-functionality to handle both audio signal amplification and motor signal amplification. The audio codec can switch between different output modes (audio output or motor output), and the single power amplifier serves both functions by receiving different signal types through the same processing path, thereby reducing the total number of components required.
2Reliability
If two separate power amplifiers are used for audio and motor signals, then each signal can be amplified with dedicated hardware, but the device cost increases
Solution Approach 1:
The patent merges the audio power amplifier and motor power amplifier into one integrated unit. The audio codec includes a DSP module that can process both audio and motor signals, and a single power amplifier provides amplification for both signal types. This consolidation reduces the bill of materials and manufacturing complexity, lowering device cost while maintaining dedicated processing paths through software/firmware control.
Solution Approach 2:
The integrated power amplifier is designed to perform multiple functions: amplifying audio signals to drive speakers and amplifying motor signals to drive vibration motors. The audio codec can dynamically switch between modes, allowing the same hardware to serve different purposes, thereby reducing overall device cost without sacrificing performance in either function.
3Use of energy by moving object
If a single power amplifier is used to drive both speaker and motor, then power consumption and cost are reduced, but the circuit configuration becomes more complex
Solution Approach 1:
The patent combines the audio and motor power amplification functions into a single circuit unit. The audio codec outputs both audio and motor signals to the same power amplifier, which then drives both the speaker and vibration motor. This merging simplifies the overall hardware architecture by reducing the number of power amplifier components, connection wires, and mounting points, thereby reducing device complexity despite the multi-functional requirement.
Solution Approach 2:
The single power amplifier is designed as a universal amplifier capable of handling both audio and motor signal types. The audio codec manages signal routing and mode switching, allowing the same amplification circuit to serve dual purposes. This approach reduces circuit complexity compared to having separate dedicated amplifiers, as it eliminates redundant components and interconnections.
Data Source
AI summary
A driving circuit for an audio power amplifier and an electronic device are provided. The driving circuit includes an audio codec, an audio power amplifier (PA), a power management integrated circuit (PMIC), a transistor, a speaker, and a motor. The transistor is connected in series with the motor to form a combined body, the speaker is connected in parallel with the combined body to form a two-in-one device, the audio PA is connected in series with the two-in-one device, the PMIC is connected in series with the two-in-one device, and the audio codec is connected in series with the audio PA. In the technical solutions provided in embodiments of the disclosure, a power amplifier can drive both the motor and the speaker, so that a power amplifier may be omitted and the power consumption and cost of the electronic equipment may be reduced.