Methods and systems for reducing transient kickback from an analog-to-digital converter
First Claim
1. Circuitry for reducing input distortion at a buffer due to large signal swings, comprising:
- an analog-to-digital converter configured to convert an analog input to a digital output;
a first buffer coupled to an input node of the analog-to-digital converter;
a low pass filter coupled to an output of a driving circuit and an input to the first buffer; and
a second buffer placed in proximity to the first buffer, an input of the second buffer being connected to an output of the driving circuit and an output of the second buffer being connected to a feedback component of the driving circuit.
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Accused Products
Abstract
Embodiments described herein provide circuitry for reducing input distortion at a buffer due to large signal swings. The circuitry includes an analog-to-digital converter (ADC), a first buffer, a low pass filter, and a second buffer. The ADC is configured to convert an analog input to a digital output. The first buffer is coupled to an input node of the ADC and the low pass filter is coupled to an output of a driving circuit and an input to the first buffer. The second buffer placed in proximity to the first buffer. An input of the second buffer is connected to an output of the driving circuit and an output of the second buffer is connected to a feedback component of the driving circuit.
10 Citations
21 Claims
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1. Circuitry for reducing input distortion at a buffer due to large signal swings, comprising:
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an analog-to-digital converter configured to convert an analog input to a digital output; a first buffer coupled to an input node of the analog-to-digital converter; a low pass filter coupled to an output of a driving circuit and an input to the first buffer; and a second buffer placed in proximity to the first buffer, an input of the second buffer being connected to an output of the driving circuit and an output of the second buffer being connected to a feedback component of the driving circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for reducing input distortion at a buffer due to large signal swings, the method comprising:
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receiving, at an analog-to-digital converter, a first analog signal from a first buffer; converting, by the analog-to-digital converter, the first analog signal into a digital signal; and reducing disturbance to the first analog signal, caused by large signal swings, by; passing a second analog signal from a driving circuit through a low pass filter and the first buffer in sequence to obtain the first analog signal, and passing the second analog signal to a second buffer that is coupled to a feedback component of the driving circuit such that the second analog signal is routed back to an input node of the driving circuit via the second buffer and the feedback component. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for reducing input distortion at a buffer due to large signal swings, the method comprising:
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forming an analog-to-digital converter to convert an analog input to a digital output on a circuit; forming a first buffer connected to an input node of the analog-to-digital converter; forming a low pass filter placed between a driving circuit and the first buffer; and forming a second buffer placed in proximity to the first buffer, an input of the second buffer being connected to an output of the driving circuit and an output of the second buffer being connected to a feedback component of the driving circuit.
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Specification