US 12,744,544 B2 · Pipelined analog-to-digital converter (ADC) and residual voltage generation circuit and generation method thereof

Abstract

A pipelined analog-to-digital converter (ADC) and a residual voltage generation circuit and generation method thereof are provided. A common mode voltage ADC is configured to convert a common mode voltage of an input signal into a first digital signal; a digital signal processing module is configured to receive the first digital signal and a second digital signal obtained by rough conversion of the input signal by an ADC and output a third digital signal and a fourth digital signal based on the first digital signal and the second digital signal, respectively; a sub-digital-to-analog converter (DAC) is configured to receive the input signals and a switching control signal and output a residual voltage; and based on the third digital signal and the fourth digital signal, a common mode voltage of the residual voltage is approximately equal to a set threshold voltage.

Claims20

Dependent claims

A residual voltage generation circuit, applied to a pipelined analog-to-digital converter (ADC), comprising:

a common mode voltage ADC, configured to receive an input signal and convert a common mode voltage of the input signal into a first digital signal;
an ADC, configured to receive the input signal and convert the input signal into a second digital signal;
a digital signal processing module, configured to receive the first digital signal and the second digital signal and output a third digital signal and a fourth digital signal;
and
a sub-digital-to-analog converter (DAC), configured to receive the input signal and a switching control signal and output a residual voltage, wherein the switching control signal is generated based on the third digital signal and the fourth digital signal;
wherein based on the third digital signal and the fourth digital signal, a common mode voltage of the residual voltage generated by the sub-DAC is approximately equal to a set threshold voltage.

3 more elements

A residual voltage generation method, comprising the following steps:

converting, by a common mode voltage ADC, a common mode voltage of an input signal into a first digital signal;
converting, by an ADC, the input signal into a second digital signal;
receiving, by a digital signal processing module, the first digital signal and the second digital signal, and outputting a third digital signal and a fourth digital signal;
and
receiving, by a sub-DAC, the input signal and a switching control signal generated based on the third digital signal and the fourth digital signal, and outputting a residual voltage;
wherein based on the third digital signal and the fourth digital signal, a common mode voltage of the residual voltage generated by the sub-DAC is approximately equal to a set threshold voltage.

3 more elements

Dependencies are inferred from the claim text.

Pipelined analog-to-digital converter (ADC) and residual voltage generation circuit and generation method thereof

Life of this patent

Pipelined analog-to-digital converter (ADC) and residual voltage generation circuit and generation method thereof

Life of this patent

Abstract

Claims20