Low power analog to digital converter
First Claim
1. A sample and integrate circuit, comprising:
- a first switching device having a first state and a second state, the first switching device including a first terminal and a second terminal, wherein the first terminal of the first switching device is configured tocommunicate with a first input voltage in response to the first switching device being in the second state, andcommunicate with a first voltage reference in response to the first switching device being in the first state;
a first capacitance in communication with the second terminal of the first switching device;
a second capacitance;
a second switching device having a first state and a second state, the second switching including a first terminal and a second terminal, wherein the first terminal of the second switching device is configured tocommunicate with a second input voltage in response to the second switching device being in the first state, andcommunicate with a second voltage reference in response to the second switching device being in the second state;
a third capacitance in communication with the second terminal of the second switching device;
a fourth capacitance; and
an amplifier having a first input and a second input, whereinthe first input of the amplifier is in communication with the first capacitance and the second capacitance, andthe second input of the amplifier is in communication with the third capacitance and the fourth capacitance.
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Abstract
A sample and integrate circuit includes first and second switching devices. A first terminal of the first switching device communicates with a first input voltage when the first switching device is in the second state. The first terminal of the first switching device communicates with a first voltage reference when the first switching device is in the first state. A first capacitance communicates with the second terminal of the first switching device. A first terminal of the second switching device communicates with a second input voltage when the second switching device is in the first state. The first terminal of the second switching device communicates with a second voltage reference when the second switching device is in the second state. A first input of an amplifier communicates with the first capacitance and a second capacitance. A second input of the amplifier communicates with a third capacitance and a fourth capacitance.
39 Citations
11 Claims
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1. A sample and integrate circuit, comprising:
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a first switching device having a first state and a second state, the first switching device including a first terminal and a second terminal, wherein the first terminal of the first switching device is configured to communicate with a first input voltage in response to the first switching device being in the second state, and communicate with a first voltage reference in response to the first switching device being in the first state; a first capacitance in communication with the second terminal of the first switching device; a second capacitance; a second switching device having a first state and a second state, the second switching including a first terminal and a second terminal, wherein the first terminal of the second switching device is configured to communicate with a second input voltage in response to the second switching device being in the first state, and communicate with a second voltage reference in response to the second switching device being in the second state; a third capacitance in communication with the second terminal of the second switching device; a fourth capacitance; and an amplifier having a first input and a second input, wherein the first input of the amplifier is in communication with the first capacitance and the second capacitance, and the second input of the amplifier is in communication with the third capacitance and the fourth capacitance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification