Adjustable Constant Current Circuit Using Segmented Mirror Sources
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional constant current sources in integrated circuits are power-consuming and occupy significant space, and they often require adjustment for different devices, which is not easily achievable with existing technologies.
Innovation Solution
A current circuit comprising a bandgap reference circuit, current mirror circuits, and a control circuit that provides a temperature-independent constant current, adjustable through a programmable switching device, allowing for flexible output based on a reference voltage signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If traditional constant current sources are used, then constant current can be provided, but power consumption is high and circuit area is large
Solution Approach 1:
The traditional single constant current source is segmented into multiple parallel constant current sources, each capable of providing a base constant current. By enabling selective activation of these segmented sources, the circuit can provide the required constant current while minimizing power consumption by activating only the necessary number of sources.
Solution Approach 2:
The circuit introduces dynamic control capability through control signals that can selectively activate or deactivate individual constant current sources. This dynamic adjustment allows the system to adapt its power consumption to the actual current requirements, improving energy efficiency while maintaining reliable constant current provision when needed.
2Area of stationary object
If traditional constant current sources are used, then constant current can be provided, but circuit area is large
Solution Approach 1:
The constant current provision function is divided into multiple independent but identical circuit modules. Each module occupies a smaller area than a single traditional source, and by arranging them in parallel with selective activation capability, the total area is reduced while maintaining the reliability of constant current provision through redundancy and selective deployment.
Solution Approach 2:
Multiple identical constant current source modules are designed with the same functionality, allowing any subset of them to be activated based on requirements. This universal design enables the system to provide constant current reliably while occupying minimal area by activating only the necessary number of modules rather than having all sources permanently active.
3Adaptability or versatility
If adjustable constant current is required for different devices, then flexibility is improved, but device complexity increases
Solution Approach 1:
The adjustable constant current functionality is achieved by segmenting the total current into multiple discrete parallel sources. By selectively activating different combinations of these segmented sources, a variety of current levels can be obtained without requiring complex continuous adjustment mechanisms, thus improving adaptability while keeping the control logic relatively simple.
Solution Approach 2:
The circuit incorporates dynamic control signals that can selectively enable or disable individual constant current sources based on device requirements. This dynamic switching capability provides adjustability for different devices while maintaining relatively simple circuit architecture, as the adjustment is achieved through selective activation rather than complex variable parameter control.
Data Source
AI summary
The present disclosure provides a current circuit. The current circuit includes a bandgap reference circuit, a plurality of current mirror circuits and a control circuit. The bandgap reference circuit is configured to provide a first current, wherein the first current is based on a reference voltage signal and is independent of temperature. The plurality of current mirror circuits are coupled to the bandgap reference circuit to receive the reference voltage signal, and the current mirror circuits are configured to provide a plurality of mirror currents based on the reference voltage signal provided by the bandgap reference circuit. The control circuit is configured to control a current flow from the plurality of current mirror circuits.