US 7,609,094 B2 · Input circuits and methods thereof

Abstract

An input circuit comprising a level-determining unit and an output unit is provided. In a first period controlled by a first enable signal, the level-determining unit receives an input signal at an input terminal of the input circuit and determines a voltage level of the input signal. The output unit is coupled to the input terminal. In the first period, the output unit outputs the input signal with the determined voltage level at an output terminal of the input circuit to serve as an output signal. In a second period following the first period, the output unit latches the determined voltage level of the input signal according to a second enable signal and outputs the input signal with the determined voltage level at the output terminal to serve as the output signal.

Claims24

Dependent claims

An input circuit, comprising

a level-determining unit for receiving an input signal at an input terminal of the input circuit and determining a voltage level of the input signal, wherein the level-determining unit receives a reference voltage and determines the voltage level of the input signal as a voltage level of the reference voltage when the input terminal is in a floating state;
and
an output unit coupled to the input terminal;
wherein in a first period, the output unit outputs the input signal with the determined voltage level at an output terminal of the input circuit to serve as an output signal, the first period being controlled by a first enable signal;
and
wherein in a second period following the first period, the output unit latches the determined voltage level of the input signal according to a second enable signal and outputs the input signal with the determined voltage level at the output terminal to serve as the output signal.

3 more elements

Dependencies are inferred from the claim text.

Input circuits and methods thereof

Life of this patent

Input circuits and methods thereof

Life of this patent

Abstract

Claims24