Analog-to-digital converter, adc, circuit and a method for controlling said adc circuit
AssigneeStichting IMEC Nederland
InventorsStan VAN DER VEN, Yao-Hong LIU, Yuming HE
Life of this patent
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Abstract
A method for predictive level-crossing, LC, in an analog-to-digital converter, ADC, is provided. The method comprises the steps of comparing a first input signal sampled during a first sampling period with one of an upper threshold level and a lower threshold level to determine if a level crossing has occurred during said first sampling period. Which one of said two threshold levels that is compared with said first input signal is based on if a level crossing occurred during a prior sampling period directly prior to the first sampling period, and which one of the two threshold levels was compared to a prior input signal sampled during said prior sampling period.
Claims15
A method for predictive level-crossing, LC, in an analog-to-digital converter, ADC, comprising the steps of:
- comparing a first input signal, Vin, sampled during a first sampling period, T1,2,3,4, with one of an upper threshold level, Vup, and a lower threshold level, Vlow, to determine if a level crossing has occurred during said first sampling period, and
- wherein which one of said two threshold levels that is compared with said first input signal is based on:
- if a level crossing occurred during a prior sampling period directly prior to the first sampling period, and
- which one of the two threshold levels was compared to a prior input signal sampled during said prior sampling period.
An analog-to-digital converter, ADC, circuit comprising:
- at least one threshold level comparator configured to:
- compare an input signal, Vin, with an upper threshold level, Vup, to determine if an up level crossing has occurred, and compare an input signal, Vin, with a lower threshold level, Vlow, to determine if a down level crossing has occurred;
- and
- wherein the ADC circuit is configured to:
- compare a first input signal sampled during a first sampling period with one of said two threshold levels and determine if a level crossing has occurred during said first sampling period;
- wherein the ADC circuit is further configured to determine which one of said two threshold levels that is compared with said first input signal based on:
- if a level crossing occurred during a prior sampling period directly prior to the first sampling period, and
- which one of said two threshold levels was compared to a prior input signal sampled during said prior sampling period.
Dependencies are inferred from the claim text.