Sampling circuit and control method
OwnerWen-Chung Yehinventor
Life of this patent
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Abstract
An embodiment provides a sampling circuit, which has a sampling capacitor and a voltage compensation circuit. The voltage compensation circuit has a reference capacitor and a compensation circuit. The sampling capacitor samples a voltage signal and memorizes the signal as a sampling signal. The reference capacitor memorizes a reference signal with a predetermined value. The compensation circuit changes the reference signal with a recovery amount to recover the reference signal to the predetermined value, and simultaneously changes the sampling signal with an adjustment amount.
Claims16
A sampling circuit, comprising:
- a sampling capacitor, for sampling a voltage signal to store a sampled signal;
- and
- a voltage compensation circuit, comprising:
- a reference capacitor, for storing a reference signal having a predetermined voltage level;
- and
- a compensation circuit, for recovering the voltage level of the reference signal back to the predetermined voltage level with a recovering level, and simultaneously adjusting a voltage level of the sampled signal with an adjusting level;
- wherein the recovering level and the adjusting level have a constant ratio.
A control method, for controlling a switching-mode power supply, the switching-mode power supply comprising a transformer, coupled to an input voltage source, controlled by a switch to charge or discharge for generating an output voltage source, the control method comprising:
- providing a sampling capacitor;
- sampling a voltage signal with the sampling capacitor and storing a sampled signal accordingly;
- adjusting a voltage level of the sampled signal stored in the sampled capacitor with an adjusting level prior next sampling the voltage signal;
- and
- adjusting a voltage level of the output voltage source according the adjusted sampled signal.
A control method, comprising:
- providing a sampling capacitor;
- sampling a voltage signal with the sampling capacitor and storing a sampled signal accordingly;
- and
- adjusting a voltage level of the sampled signal stored in the sampled capacitor with an adjusting level prior next sampling the voltage signal.
Dependencies are inferred from the claim text.