A/D conversion circuit and test method
First Claim
1. An electric device, comprising:
- first, second and third selectors;
a first node that is coupled to a first input of the first selector;
a second node that is coupled to a first input of the second selector;
a third node that is coupled to a second input of the first selector;
a fourth node that is coupled to a second input of the second selector;
a first switch that is coupled to the first node;
a second switch that is coupled to the second node;
a first capacitor that is coupled between the first switch and the third node;
a second capacitor that is coupled between the second switch and the fourth node;
a fifth node that is coupled between an output of the first selector and a first input of the third selector;
a sixth node that is coupled between an output of the second selector and a second input of the third selector; and
an analog/digital (A/D) converter that is coupled to an output of the third selector.
1 Assignment
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Accused Products
Abstract
An electric device includes first, second and third selectors. A first node connects to a first input of the first selector, a second node connects to a first input of the second selector, a third node connects to a second input of the first selector, and a fourth node connects to a second input of the second selector. A first switch connects to the first node, and a second switch connects to the second node. A first capacitor connects between the first switch and the third node, and a second capacitor connects between the second switch and the fourth node. A fifth node connects between an output of the first selector and a first input of the third selector, and a sixth node connects between an output of the second selector and a second input of the third selector. An A/D converter connects to an output of the third selector.
141 Citations
10 Claims
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1. An electric device, comprising:
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first, second and third selectors; a first node that is coupled to a first input of the first selector; a second node that is coupled to a first input of the second selector; a third node that is coupled to a second input of the first selector; a fourth node that is coupled to a second input of the second selector; a first switch that is coupled to the first node; a second switch that is coupled to the second node; a first capacitor that is coupled between the first switch and the third node; a second capacitor that is coupled between the second switch and the fourth node; a fifth node that is coupled between an output of the first selector and a first input of the third selector; a sixth node that is coupled between an output of the second selector and a second input of the third selector; and an analog/digital (A/D) converter that is coupled to an output of the third selector. - View Dependent Claims (2, 3, 4, 5, 7, 8, 9, 10)
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6. The electric device according to claim I, further comprising:
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an input selection controller that generates first and second signals, wherein the fourth selector switches, in response to the first signal, a connection configuration where the first node is coupled to the first terminal to a connection configuration where the first node is coupled to the reference voltage generator, and wherein the fifth selector switches, in response to the second signal, a connection configuration where the second node is coupled to the second terminal to a connection configuration where the second node is coupled to the reference voltage generator.
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Specification