ANALOG-TO-DIGITAL CONVERTER
First Claim
1. An analog-to-digital converter (ADC) comprising:
- an input switch;
an array of binary-weighted capacitors, the array of capacitors receiving the input voltage signal via the input switch in an on state of the input switch;
a plurality of switches, each switch connected in series with a respective one of the capacitors at an opposite side compared to the input switch, wherein a VDD signal is applied to each switch in one switching state and ground in another switching state;
a comparator having as one input a voltage from the input switch side of the array of capacitors and as another input a voltage of VDD/2; and
a successive approximation register (SAR) coupled to an output of the comparator for controlling the switches based on the output from the comparator.
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Accused Products
Abstract
An analog-to-digital converter (ADC) and a battery operated electronic device comprising the ADC. The ADC comprising an input switch; an array of binary-weighted capacitors, the array of capacitors receiving the input voltage signal via the input switch in an on state of the input switch; a plurality of switches, each switch connected in series with a respective one of the capacitors at an opposite side compared to the input switch, wherein a VDD signal is applied to each switch in one switching state and ground in another switching state; a comparator having as one input a voltage from the input switch side of the array of capacitors and as another input a voltage of VDD/2; and a switch control unit coupled to an output of the comparator for controlling the switches based on the output from the comparator.
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Citations
14 Claims
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1. An analog-to-digital converter (ADC) comprising:
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an input switch; an array of binary-weighted capacitors, the array of capacitors receiving the input voltage signal via the input switch in an on state of the input switch; a plurality of switches, each switch connected in series with a respective one of the capacitors at an opposite side compared to the input switch, wherein a VDD signal is applied to each switch in one switching state and ground in another switching state; a comparator having as one input a voltage from the input switch side of the array of capacitors and as another input a voltage of VDD/2; and a successive approximation register (SAR) coupled to an output of the comparator for controlling the switches based on the output from the comparator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification