US 8,928,504 B2 · Multiplying analog-to-digital converter and pipeline analog-to-digital converter using the same

Abstract

A multiplying analog-to-digital converter is provided. A sample-and-hold unit samples an analog signal, to obtain a sample level. A analog-to-digital converting unit converts the analog signal to a digital signal. A digital-to-analog converting unit converts the digital signal to a recovered signal level. A operating unit provides an output signal according to the difference between the sample level and the recovered signal level. A comparator compares a level of the output signal with an upper threshold level and a lower threshold level, and accordingly provides an indicating signal, wherein the upper and lower threshold levels define a predetermined level range. When the indicating signal indicates that the level of the output signal is outside the predetermined level range, a controller shifts a value of the digital signal and accordingly provides an adjusted digital signal.

Claims19

Dependent claims

A multiplying analog-to-digital converter, comprising:

a sample-and-hold unit, for sampling an analog signal to obtain a sample level;
an analog-to-digital converting unit, for converting the analog signal to obtain a digital signal, wherein the level range of the digital signal is between a minimum and a maximum;
a digital-to-analog converting unit, for converting the digital signal to obtain a recovered signal level;
an operating unit, for providing an output signal according to the difference between the sample level and the recovered signal level;
a comparator, for comparing the level of the output signal with an upper threshold level and a lower threshold level and accordingly providing an indicating signal representing the comparison result, wherein the upper threshold level and the lower threshold level define a predetermined level range;
and
a controller, for shifting a value of the digital signal and accordingly providing an adjusted digital signal when the indicating signal indicates that the level of the output signal is outside the predetermined level range.

4 more elements

A multiplying analog-to-digital converter, comprising:

an analog-to-digital converting unit, converting an analog signal to obtain a digital signal, wherein the level range of the digital signal is between a minimum and a maximum;
a switch capacitor circuit, for providing an output signal according to the analog signal and the digital signal;
a comparator, for comparing the level of the output signal with an upper threshold level and a lower threshold level, and providing an indicating signal representing the comparison result, wherein the upper threshold level and the lower threshold level define a predetermined level range;
and
a controller, for shifting a value of the digital signal and accordingly provides an adjusted digital signal when the indicating signal indicates that the level of the output signal is outside the predetermined level range.

2 more elements

Dependencies are inferred from the claim text.

Multiplying analog-to-digital converter and pipeline analog-to-digital converter using the same

Life of this patent

Multiplying analog-to-digital converter and pipeline analog-to-digital converter using the same

Life of this patent

Abstract

Claims19