Power-On Reset Circuit for Voltage Conversion Apparatus
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Solution Overview
Problem
Existing voltage conversion apparatuses with integrated charge pumps and power-ON reset (POR) circuits face complexity and inaccuracies due to voltage variations, leading to large-size circuits and complicated control schemes.
Innovation Solution
A voltage conversion apparatus with a power-ON reset circuit that includes an input status detection circuit, an output status detection circuit, and a status feedback circuit, generating a POR signal based on input and output voltage readiness, using a logic circuit and delay circuit to ensure accurate POR signaling, and optionally incorporating a charge pump circuit with non-overlapping clock signals for voltage conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a charge pump is integrated with a POR circuit, then voltage conversion function is achieved, but the circuit size becomes large and control scheme becomes complicated
Solution Approach 1:
The patent divides the voltage conversion apparatus into separate functional modules: a charge pump circuit for voltage conversion, a status detection circuit for monitoring voltages, and a POR circuit for reset control. This segmentation allows each module to be optimized independently, reducing overall circuit complexity while maintaining voltage conversion capability
Solution Approach 2:
The POR circuit is extracted as a separate functional block from the charge pump circuit. The status detection circuit is also separated to independently monitor input and output voltages. This extraction eliminates the need for complex integrated control schemes while achieving both voltage conversion and accurate POR signaling
2Adaptability or versatility
If voltage conversion is performed using existing charge pump integration, then voltage conversion is achieved, but the POR signal accuracy becomes inaccurate due to voltage variations
Solution Approach 1:
The patent implements a status detection circuit that continuously monitors both input voltage (via first comparison circuit) and output voltage (via second comparison circuit), feeding back status signals to the POR circuit. This feedback mechanism allows the POR circuit to accurately determine when voltage thresholds are met, generating accurate POR signals despite voltage variations during conversion
Solution Approach 2:
The status detection circuit acts as an intermediary between the charge pump circuit and the POR circuit. It translates analog voltage levels into digital status signals that the POR circuit can reliably process, eliminating direct coupling and improving measurement precision of the POR signal
Data Source
AI summary
The present invention discloses a voltage conversion apparatus and a power-ON reset (POR) circuit and a control method thereof. The voltage conversion apparatus includes: a conversion circuit, an input status detection circuit, an output status detection circuit, a status feedback circuit, and a POR circuit. The POR circuit generates a POR signal according to an input status signal, an output status signal, and a feedback signal, to indicate whether a POR procedure is completed. The POR circuit includes: a logic circuit, for generating a reset signal indicating whether both the input and output voltages are ready; and a delay circuit, for generating the POR signal by delaying a predetermined time period according to the reset signal and a feedback signal related to the POR signal.