Voltage Doubler Oscillating Control Signal Generator

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Solution Overview

Problem

Conventional voltage doublers face inefficiencies due to difficulties in timely switching oscillating control signal frequencies, leading to asymmetric duty cycles, oscillation losses, and glitches, which affect the overall performance of the voltage doubling process.

Innovation Solution

A voltage doubler system comprising a charge pump, a comparator, a fundamental oscillation signal generator, and an oscillating control signal generator, where the oscillating control signal is generated by selectively blocking status changes of the fundamental oscillation signal based on comparison results and electric current consumption status, using a logic circuit with rising and falling edge detectors and a D flip-flop oscillator to maintain a symmetric duty cycle and prevent glitches.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a multiplexing design is used to select oscillation signals, then multiple oscillation frequencies can be provided as candidates, but it is difficult to timely switch the frequency without affecting the efficiency of the voltage doubler

Engineering Contradiction:

Improveoscillation frequency selectionVSAvoidswitching timeliness

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent prepares multiple oscillation signals (fx1, fx2) in advance with different frequencies, and the oscillating control signal generator is pre-configured to select from these prepared signals based on system conditions, avoiding the need for real-time frequency synthesis during operation

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent dynamically adjusts the oscillation frequency by switching between pre-prepared oscillation signals based on real-time system state (such as capacitor voltage level and current consumption status), making the system adaptable while maintaining reliable switching through dynamic control

Inventive Principle:

Principle #15Dynamics

2Productivity

If the oscillating control signal has an asymmetric duty cycle, then frequency switching can be achieved, but the efficiency of the voltage doubler is affected

Engineering Contradiction:

Improvevoltage doubling efficiencyVSAvoidduty cycle symmetry

Core Design Contradiction:

ProductivityVSShape

Solution Approach 1:

The patent intentionally introduces asymmetric control signals during specific transition periods to achieve timely frequency switching, while maintaining symmetric duty cycles during steady-state operation to ensure high voltage doubling efficiency, thus applying asymmetry selectively where needed

Inventive Principle:

Principle #4Asymmetry

3Reliability

If the oscillating control signal switches frequency timely, then the duty cycle remains symmetric, but oscillation losses occur during switching transitions

Engineering Contradiction:

Improveduty cycle symmetryVSAvoidoscillation loss

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent anticipates potential oscillation losses during frequency switching by using pre-prepared oscillation signals and smooth transition control mechanisms, cushioning against energy losses before they occur through proactive signal preparation and controlled switching timing

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

4Productivity

If the selection signal switching is synchronized with the falling edge of the oscillating signal, then frequency switching is achieved, but glitches occur due to PVT variations

Engineering Contradiction:

Improvefrequency switching capabilityVSAvoidsignal stability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent employs feedback mechanisms that monitor the actual oscillation signal state and adjust the selection signal timing accordingly, using comparison results and current consumption status to dynamically determine the optimal switching moment, thereby eliminating glitches caused by PVT variations

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS8653883B2Voltage doubler and oscillating control signal generator thereof

Publication Date: 2014.02.18 NAN YA TECH

AI summary

A voltage doubler and an oscillating control signal generator controlling a charge pump (powered by a first voltage to provide a second voltage) of the voltage doubler are disclosed. The oscillating control signal generator includes a first input terminal receiving a fundamental oscillation signal, a second input terminal receiving a comparison result showing whether the second voltage is greater than a target value, a third input terminal operative to obtain an electric current consumption status at an output terminal of the charge pump, and an output terminal outputting an oscillating control signal for the control of the charge pump. Further, the oscillating control signal generator includes a logic circuit. The logic circuit generates the oscillating control signal by selectively blocking status changes of the fundamental oscillation signal according to the comparison result and the electric current consumption status.