US 2003/0080784 A1 · Comparing circuit, comparator, level determining circuit and threshold voltage setting method

Abstract

In a comparing circuit, an input signal switching circuit has a first input terminal, a second input terminal, a first output terminal and a second output terminal. The input signal switching circuit is configured to receive a first input signal inputted to the first input terminal and a second input signal inputted to the second input terminal. The input signal switching circuit is also configured to output the first input signal to switchably one of the first and second output terminals and the second input signal to other thereof in accordance with a switching signal. A comparator has a reverse input terminal and a non-reverse input terminal and configured to receive through the reverse input terminal a first signal outputted from the first output terminal, and receive through the non-reverse input terminal a second signal outputted from the second output terminal.

Claims15

Dependent claims

A comparing circuit comprising:

an input signal switching circuit having a first input terminal, a second input terminal, a first output terminal and a second output terminal, and configured to receive a first input signal inputted to the first input terminal and a second input signal inputted to the second input terminal,
said input signal switching circuit being configured to output the first input signal to switchably one of the first and second output terminals and the second input signal to other thereof in accordance with a switching signal;
and
a comparator having a reverse input terminal and a non-reverse input terminal and configured to receive through the reverse input terminal a first signal outputted from the first output terminal, and receive through the non-reverse input terminal a second signal outputted from the second output terminal.

1 more element

A comparator comprising:

a first input terminal;
a second input terminal;
an output terminal;
a differential amplifier including a first differential input transistor, a second differential input transistor connected thereto and a load circuit connected to the first differential input transistor and the second differential input transistor;
an amplifier connected between the differential amplifier and the output terminal;
and
an input signal switching circuit connected to the first input terminal and the second input terminal and configured to supply, in accordance with a switching signal, a first signal to switchably one of the first differential input transistor and the second differential input transistor,
said first signal being inputted to the first input terminal,
said input signal switching circuit being configured to supply, in accordance with the switching signal, a second signal to switchably other of the first differential input transistor and the second differential input transistor,
said second signal being inputted to the second input terminal.

7 more elements

Dependencies are inferred from the claim text.

Comparing circuit, comparator, level determining circuit and threshold voltage setting method

Life of this patent

Comparing circuit, comparator, level determining circuit and threshold voltage setting method

Life of this patent

Abstract

Claims15