Dynamic Current-Limiting Power Circuit for Wireless Adapters
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Solution Overview
Problem
Existing wireless network adapters face challenges in reducing capacitor size and cost while maintaining normal operation, as large capacitors are costly and removing the current-limiting chip can cause notebook computers to restart.
Innovation Solution
A power circuit with a current-limiting chip, a current-limiting value setting circuit, and a baseband chip, where the current-limiting value is dynamically set based on time sequence periods to reduce capacitor requirements, using impedance devices and MOS transistors to manage current levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large capacitors are used in the wireless network adapter, then the adapter can operate normally, but the cost and volume of the adapter increase
Solution Approach 1:
The patent applies dynamics by making the current-limiting value adjustable through a control circuit that responds to voltage drops. The current limiting parameter is no longer fixed but dynamically adapted based on real-time power supply conditions, allowing the system to maintain normal operation with smaller capacitors.
Solution Approach 2:
The patent changes the current-limiting parameter from a fixed value to a dynamically adjustable value. By modifying the current-limiting value based on detected voltage drops, the system optimizes power management and reduces capacitor requirements while ensuring reliable operation.
2Volume of stationary object
If the current-limiting chip is removed to reduce capacitor requirements, then capacitor cost and volume decrease, but the notebook computer restarts affecting normal use
Solution Approach 1:
The patent extracts the current-limiting function from a dedicated current-limiting chip and integrates it into the baseband chip's control circuit. This eliminates the need for separate current-limiting hardware and large capacitors while maintaining the protective function through software-controlled current limiting.
Solution Approach 2:
The patent makes the baseband chip multi-functional by integrating the current-limiting control function into it. The baseband chip now serves both as the wireless communication controller and as the current-limiting regulator, eliminating the need for separate dedicated components.
3Device complexity
If the current-limiting value is fixed, then the circuit is simple, but the capacitor size must be large to handle peak current demands
Solution Approach 1:
The patent transforms the fixed current-limiting value into a dynamic parameter that adjusts based on power supply conditions. The control circuit detects voltage drops and responds by adjusting the current limit, enabling smaller capacitors to suffice while maintaining circuit feasibility.
4Stability of the object's composition
If larger capacitors are used to ensure stable power supply, then power stability improves, but the adapter cannot be miniaturized and cost increases
Solution Approach 1:
The patent implements feedback by having the control circuit continuously monitor the power supply voltage and adjust the current-limiting value in response to detected voltage drops. This feedback mechanism ensures power stability during timeslot transmitting without requiring large capacitors, enabling miniaturization while maintaining stability.
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
This solution reduces capacitor size and cost while ensuring normal operation of the wireless network adapter by dynamically adjusting current-limiting values, preventing notebook computer restarts and enabling downsizing of the adapter.
Implementation Method 1
A drain electrode of the MOS transistor is connected to the current setting port of the current-limiting chip, a gate electrode of the MOS transistor is connected to the general-purpose input/output port of the baseband chip, and a source electrode of the MOS transistor is connected to the ground through the sixth impedor. The MOS transistor is an N-channel MOS transistor. In the first time sequence period of timeslot transmitting of the baseband chip, the general-purpose input/output port generates a high level and the drain electrode of the MOS transistor is conducted with the source electrode. In the other time sequence periods of timeslot transmitting and a non-timeslot-transmitting period of the baseband chip, the general-purpose input/output port generates a low level and the drain electrode of the MOS transistor is disconnected with the source electrode.
Data Source
AI summary
The present invention provides a power circuit, including a current-limiting chip, a current-limiting value setting circuit, and a baseband chip. A current setting port of the current-limiting chip is connected to a general-purpose input/output port of the baseband chip through the current-limiting value setting circuit. The general-purpose input/output port is configured to generate a first signal in a first time sequence period of timeslot transmitting of the baseband chip so that the current-limiting value setting circuit sets a current-limiting value of the current-limiting chip as a first current-limiting value. In the other time sequence periods of timeslot transmitting of the baseband chip, the general-purpose input/output port generates a second signal so that the current-limiting value setting circuit sets the current-limiting value of the current-limiting chip as a second current-limiting value. The first current-limiting value is greater than the second current-limiting value.