US 12,224,766 B2 · Analog digital converter and method for analog to digital converting in the analog digital converter

Abstract

An analog-to-digital converter is provided. An analog-to-digital converter includes a comparator including a first input node receiving an output of a plurality of first unit capacitors and a second input node receiving an output of a plurality of second unit capacitors, a control logic configured to output first and second control signals on the basis of an output signal of the comparator, and a reference voltage adjustment circuit configured to adjust an output voltage provided to the comparator on the basis of the first and second control signals. The reference voltage adjustment circuit comprises a first pull-up circuit configured to apply a first reference voltage to each of the plurality of first unit capacitors and a first pull-down circuit configured to apply a second reference voltage to each of the plurality of second unit capacitors, based on v.

Claims21

Dependent claims

An analog-to-digital converter comprising:

a comparator including a first input node receiving an output of a plurality of first unit capacitors and a second input node receiving an output of a plurality of second unit capacitors;
a control logic configured to output first and second control signals on the basis of an output signal of the comparator;
and
a reference voltage adjustment circuit configured to adjust an output voltage provided to the comparator on the basis of the first and second control signals, wherein the reference voltage adjustment circuit comprises a first pull-up circuit configured to apply a first reference voltage to each of the plurality of first unit capacitors and a first pull-down circuit configured to apply a second reference voltage to each of the plurality of second unit capacitors, based on the first and second controls signals.

1 more element

An analog-to-digital converter comprising:

a first capacitor array including a plurality of thermometer code-based first unit capacitors used to determine upper bits of a digital output signal corresponding to an analog input signal;
a second capacitor array including a plurality of binary-weighted second unit capacitors used to determine lower bits of the digital output signal;
and
a control logic configured to receive a reference voltage from the first and second capacitor arrays to output first and second control signals,
wherein the first and second capacitor arrays comprise first and second operation switches configured to apply first and second reference voltages on the basis of the first and second control signals, respectively.

2 more elements

A method of performing analog-to-digital conversion using an analog-to-digital converter including a comparator including a plurality of nodes to which outputs of a plurality of first unit capacitors and outputs of a plurality of second unit capacitors are connected, a control logic, a pull-up circuit and a pull-down circuit, the method comprising:

outputting, by the control logic, first and second control signals on the basis of an output signal of the comparator;
and adjusting, by the pull-up circuit and the pull-down circuit a reference voltage applied to the plurality of first unit capacitors and the plurality of second unit capacitors on the basis of the first and second control signals,
wherein the adjusting comprises the pull-up circuit applying a first reference voltage to each of the plurality of first unit capacitors, and the pull-down circuit applying a second reference voltage to each of the plurality of second unit capacitors that is different from the first reference voltage.

Dependencies are inferred from the claim text.

Analog digital converter and method for analog to digital converting in the analog digital converter

Life of this patent

Analog digital converter and method for analog to digital converting in the analog digital converter

Life of this patent

Abstract

Claims21