US 12,323,158 B2 · Analog-to-digital converter and method for analog-to-digital conversion

Abstract

An analog-to-digital converter is provided which is configured to output an n-bit signal in response to an analog input signal. n is greater than 1. The converter comprises n comparators, where each comparator is configured to output one bit of the n-bit signal and comprising a first input and a second input. A first comparator is configured to receive the analog input signal at its first input and a reference value at its second input and to output the first, most significant bit of the n-bit signal. For the remaining comparators, an i-th comparator, i=2 . . . n, is configured to output an i-th bit, the analog-to-digital converter comprises a respective i-th input device. The i-th input device is configured to selectively provide one of 2i−1 reference values to one of the first or second input of the i-th comparator and the analog input signal to the other one of the first or second input of the i-th comparator, such that the n-bit signal is a Gray code representation of the analog input signal.

Claims30

Dependent claims

An analog-to-digital converter configured to output an n-bit signal in response to an analog input signal, where n is greater than 1, the analog-to-digital converter comprising:

n comparators, each comparator configured to output one bit of the n-bit signal and comprising a first input and a second input,
wherein a first comparator is configured to receive a reference value at its first input and the analog input signal at its second input and to output the first, most significant bit of the n bit signal,
wherein for an i-th comparator, where i=2 . . . n, configured to output an i-th bit, the analog-to-digital converter comprises a respective i-th input device configured to selectively provide one of 2i−1 reference values to one of the first or second input of the i-th comparator and the analog input signal to the other one of the first or second input of the i-th comparator such that the n-bit signal is a Gray code representation of the analog input signal.

An analog-to-digital converter comprising:

a first comparator operative to receive an analog input signal and a first reference value, the first comparator operative to output a first bit value of a multi-bit signal based on a comparison of the analog input signal to the first reference value;
a second comparator operative to receive the analog input signal and a second reference value, the second comparator operative to output a second bit value of the multi-bit signal based on a comparison of the analog input signal to the second reference value;
and
first signal path switch circuitry operative to control selection of switching between inputting the analog input signal to a first input of the second comparator and inputting the analog input signal to a second input of the second comparator.

1 more element

Dependencies are inferred from the claim text.

Analog-to-digital converter and method for analog-to-digital conversion

Life of this patent

Analog-to-digital converter and method for analog-to-digital conversion

Life of this patent

Abstract

Claims30