Frequency Hopping Charge Pump Settling Time
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Solution Overview
Problem
Charge pumps in radio frequency switch devices face challenges with settling time and spurious emissions, both of which are dependent on the clock signal frequency, necessitating a solution to reduce settling time and minimize power consumption while controlling spurious emissions.
Innovation Solution
An energy management core circuit is introduced, featuring a frequency generator that provides a high initial frequency for rapid settling and then transitions to lower frequencies to reduce power consumption and spurious emissions, utilizing a counter and oscillator to generate non-overlapping clock signals and adjust frequencies through a dithering cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a high clock signal frequency is used to reduce settling time, then the settling time is reduced, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the clock signal frequency variable rather than fixed. The frequency generator dynamically adjusts the clock frequency based on operational phase: using a first (higher) frequency during initial operation to reduce settling time, and transitioning to a second (lower) frequency during steady-state operation to reduce power consumption. This dynamic adaptation resolves the contradiction between fast settling and low power consumption.
Solution Approach 2:
The patent implements periodic action through frequency hopping, where the clock signal alternates between different frequencies in a controlled sequence. The system periodically switches from a higher frequency to a lower frequency after the charge pump settles, creating distinct operational phases that achieve both rapid settling and reduced power consumption at different times in the cycle.
2Loss of time
If a high clock signal frequency is used to reduce settling time, then the settling time is reduced, but spurious emissions increase
Solution Approach 1:
The patent applies dynamics by making the clock signal frequency variable rather than fixed. The frequency generator dynamically adjusts the clock frequency based on operational phase: using a first (higher) frequency during initial operation to reduce settling time, and transitioning to a second (lower) frequency during steady-state operation to reduce power consumption. This dynamic adaptation resolves the contradiction between fast settling and low power consumption.
Solution Approach 2:
The patent implements periodic action through frequency hopping, where the clock signal alternates between different frequencies in a controlled sequence. The system periodically switches from a higher frequency to a lower frequency after the charge pump settles, creating distinct operational phases that achieve both rapid settling and reduced power consumption at different times in the cycle.
3Use of energy by moving object
If a low clock signal frequency is used to reduce power consumption, then power consumption is reduced, but settling time increases
Solution Approach 1:
The patent applies preliminary action by using a higher clock frequency during the initial settling phase before transitioning to a lower frequency. The system performs the settling operation first with adequate frequency headroom, then reduces frequency for normal operation. This preliminary high-frequency action ensures fast settling is achieved without compromising steady-state power consumption.
Solution Approach 2:
The patent implements periodic action through frequency hopping, where the clock signal alternates between different frequencies in a controlled sequence. The system periodically switches from a higher frequency to a lower frequency after the charge pump settles, creating distinct operational phases that achieve both rapid settling and reduced power consumption at different times in the cycle.
4Object-generated harmful factors
If a low clock signal frequency is used to reduce spurious emissions, then spurious emissions are reduced, but settling time increases
Solution Approach 1:
The patent applies preliminary action by using a higher clock frequency during the initial settling phase before transitioning to a lower frequency. The system performs the settling operation first with adequate frequency headroom, then reduces frequency for normal operation. This preliminary high-frequency action ensures fast settling is achieved without compromising steady-state power consumption.
Solution Approach 2:
The patent implements periodic action through frequency hopping, where the clock signal alternates between different frequencies in a controlled sequence. The system periodically switches from a higher frequency to a lower frequency after the charge pump settles, creating distinct operational phases that achieve both rapid settling and reduced power consumption at different times in the cycle.
Data Source
AI summary
Embodiments provide, among other things, a circuit including a frequency generator and a charge pump. In embodiments, the frequency generator may be configured to provide the charge pump with a clock signal at a first frequency for a predefined period of time. Thereafter, the frequency generator may provide the charge pump with a clock signal at one or more other frequencies. In embodiments, the first frequency may enable the charge pump to settle in a reduced period of time when compared with the one or more other frequencies.