Bias Generation Circuit With Feedback Voltage Stabilization
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Solution Overview
Problem
The bias voltage generated by existing bias generation circuits is not stable due to changes in other voltages within the circuit, leading to unstable operation of circuits that rely on this bias voltage.
Innovation Solution
A bias generation circuit is designed with a first load circuit, a bias circuit, a voltage stabilizing circuit, and a second load circuit. The voltage stabilizing circuit and second load circuit jointly regulate the current through the bias circuit, ensuring the bias voltage remains within a stable value range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bias generation circuit is used to convert working voltage to bias voltage, then the bias voltage can be generated, but the bias voltage becomes unstable when other voltages in the circuit change
Solution Approach 1:
The patent implements a feedback mechanism where the voltage stabilizing circuit continuously monitors the regulating node voltage and adjusts the bias circuit output accordingly. When voltage changes occur in the circuit, the feedback loop detects these changes and compensates by adjusting the bias voltage to maintain stability, directly resolving the contradiction between generating bias voltage and maintaining stability under voltage variations.
Solution Approach 2:
The patent introduces a voltage stabilizing circuit as an intermediary between the bias circuit and the load. This intermediary component isolates the bias voltage from direct influence by other voltage changes in the circuit, acting as a buffer that maintains stable bias voltage output even when input voltages or load conditions vary.
2Device complexity
If the bias voltage is generated based on working voltage, then the circuit structure is simple, but the bias voltage cannot remain within a stable value range
Solution Approach 1:
The voltage stabilizing circuit employs feedback control to monitor and adjust the bias voltage in real-time. This feedback mechanism adds minimal circuit complexity while effectively maintaining bias voltage stability within a predetermined range, preventing the bias voltage from drifting when working voltage changes.
Solution Approach 2:
The patent utilizes parameter changes in the voltage stabilizing circuit to dynamically adjust the bias voltage output. By changing operational parameters such as transistor gate voltages or resistor ratios in response to detected voltage variations, the circuit maintains stable bias voltage output without requiring a completely complex circuit architecture.
Data Source
AI summary
A bias generation circuit and a memory circuit are provided. The bias generation circuit includes: a first load circuit coupled between a working voltage and an regulating node; a bias circuit configured to receive the working voltage and output a bias voltage according to the working voltage; a voltage stabilizing circuit coupled to an output end of the bias circuit and configured to receive a reference voltage and regulate a voltage of the regulating node according to the bias voltage and the reference voltage; and a second load circuit having one end coupled to the output end of the bias circuit and the other end coupled to the regulating node.