Power Supply Circuit System with Dynamic Frequency Control
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Solution Overview
Problem
Conventional power supply circuit systems with charge pump and voltage regulator circuits face issues with large voltage ripples and instability when the loading amount to the load circuit varies abruptly, and are unable to effectively manage current consumption.
Innovation Solution
A power supply circuit system that includes an oscillation circuit, a charge pump circuit, a voltage regulator circuit, and a control circuit to adjust the oscillation frequency based on current consumption, using comparator circuits to detect current levels and control the resistance value of a variable resistance circuit to maintain optimal current consumption within a predetermined range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the operating frequency of the charge pump circuit is adjusted based on the boosted voltage reaching a predetermined voltage, then current consumption is suppressed, but large ripples appear in the output voltage
Solution Approach 1:
The patent implements a feedback control mechanism where the current flowing through the voltage regulator circuit is continuously detected and compared against reference currents. Based on this feedback, the oscillation frequency of the charge pump is dynamically adjusted to maintain current within a predetermined range, thereby suppressing both excessive current consumption and voltage ripples through closed-loop control
Solution Approach 2:
The patent changes the operating parameters of the charge pump circuit by dynamically adjusting the oscillation frequency based on detected current levels. When current exceeds the upper reference, frequency is reduced; when current falls below the lower reference, frequency is increased. This parameter modulation maintains optimal operation while preventing voltage instability
2Reliability
If the charge pump circuit operates at high frequency to meet varying load demands, then output voltage stability is maintained, but current consumption increases
Solution Approach 1:
The patent employs dynamic frequency adjustment of the charge pump circuit based on real-time current detection. The oscillation frequency is not fixed but varies dynamically within a predetermined range to match actual load requirements, enabling the system to maintain voltage stability only when necessary while reducing current consumption during normal operation
Solution Approach 2:
The system dynamically changes the oscillation frequency parameter of the charge pump based on detected current levels relative to upper and lower reference currents, optimizing the balance between power efficiency and voltage stability by adjusting operational parameters in response to actual system conditions
3Device complexity
If the oscillation frequency is kept constant to simplify control, then device complexity is reduced, but the system cannot adapt to abrupt loading changes
Solution Approach 1:
The patent incorporates a feedback control system that detects current through the voltage regulator and compares it against reference currents using comparator circuits. This feedback mechanism automatically adjusts the oscillation frequency in response to loading changes without requiring complex control algorithms, achieving adaptability through simple threshold-based feedback
Solution Approach 2:
The system performs self-adjustment by automatically detecting current levels and modulating the charge pump frequency without external intervention. The control circuit autonomously responds to loading changes by comparing detected current against reference values and adjusting oscillation frequency accordingly, enabling the system to adapt to varying loads while maintaining relatively simple control architecture
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 effectively suppresses current consumption and stabilizes the output voltage, reducing ripples and ensuring stable operation even with abrupt changes in loading, by dynamically adjusting the oscillation frequency of the ring oscillator based on current levels.
Implementation Method 1
an oscillation circuit structured to be capable of controlling an oscillation frequency and outputting an oscillation output signal
Implementation Method 2
a charge pump circuit boosting an input voltage and outputting a boosted voltage in response to the oscillation output signal
Implementation Method 3
a voltage regulator circuit adjusting the boosted voltage from the charge pump circuit to a predetermined voltage
Implementation Method 4
a control circuit outputting a control signal controlling the oscillation circuit so that the oscillation frequency of the oscillation circuit is increased when a first current flowing through the voltage regulator circuit is smaller than a first reference current
Data Source
AI summary
A power supply circuit system includes a ring oscillator provided with a variable resistance circuit, a charge pump circuit outputting a boosted voltage in response to an oscillation output signal from the ring oscillator, a voltage regulator circuit adjusting the boosted voltage from the charge pump circuit, a first current comparator circuit comparing a first current flowing through the voltage regulator circuit with a first reference current, a second current comparator circuit comparing the first current with a second reference current, and a control circuit outputting control signals to control a resistance value of the variable resistance circuit in accordance with a first comparison signal from the first current comparator circuit and a second comparison signal from the second current comparator circuit.