Voltage converter
OwnerPing-Ying Wanginventor
Life of this patent
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Abstract
A voltage converter for converting an analog input signal into a digital signal is provided. The pulse width of the digital signal is relative to the voltage level of the analog input signal. The voltage converter includes a comparator and a feedback module. After comparing the analog input signal and an analog feedback signal, the comparator generates the digital signal. When the analog input signal is higher than the analog feedback signal, the digital signal has a first voltage level. When the analog input signal is lower than the analog feedback signal, the digital signal has a second voltage level, which is different from the first voltage level. Based on the digital signal, the feedback module adjusts the analog feedback signal toward the analog input signal.
Claims20
A voltage converter for converting an analog input signal to a digital signal, the pulse-width of the digital signal being related to the amplitude of the analog input signal, the voltage converter comprising:
- a comparator for comparing the analog input signal and an analog feedback signal, so as to generate the digital signal;
- when the analog input signal is higher than the analog feedback signal, the digital signal having a first voltage level;
- when the analog input signal is lower than the analog feedback signal, the digital signal having a second voltage level different from the first voltage level;
- and
- a feedback module for resetting the analog feedback signal to an initial feedback voltage before the comparator starts to compare the analog input signal so that the pulse width of the digital signal is directly proportional to a difference of the analog input signal and the initial feedback voltage, and for adjusting the analog feedback signal based on the digital signal, so as to make the analog feedback signal approach the analog input signal.
A voltage converter for converting an analog input signal to a digital signal, the pulse-width of the digital signal being related to the amplitude of the analog input signal, the voltage converter comprising:
- a comparator for comparing the analog input signal and an analog feedback signal, so as to generate the digital signal;
- when the analog input signal is higher than the analog feedback signal, the digital signal having a first voltage level;
- when the analog input signal is lower than the analog feedback signal, the digital signal having a second voltage level different from the first voltage level;
- a feedback module for adjusting the analog feedback signal based on the digital signal, so as to make the analog feedback signal approach the analog input signal;
- and
- a level-adjusting module for adjusting the pulse width of the digital signal to be larger than a threshold value.
A voltage converter for converting an analog input signal to a digital signal, the pulse-width of the digital signal being related to the amplitude of the analog input signal, the voltage converter comprising:
- a comparator for comparing the analog input signal and an analog feedback signal, so as to generate the digital signal;
- when the input signal is higher than the analog feedback signal, the digital signal having a first voltage level;
- when the analog input signal is lower than the analog feedback signal, the digital signal having a second voltage level different from the first voltage level;
- a feedback module for adjusting the analog feedback signal based on the digital signal, so as to make the analog feedback signal approach the analog input signal;
- a reference signal module for providing a default reference signal as the analog input signal;
- an error estimating module for measuring the digital signal generated based on the default reference signal and comparing the digital signal with a standard digital signal, so as to generate an estimated error;
- and
- a correcting module for correcting the digital signal based on the estimated error.
Dependencies are inferred from the claim text.