Analog to digital convertor (ADC) using a common input stage and multiple parallel comparators
First Claim
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1. An Analog to Digital converter (ADC) comprising:
- a first circuitry to sample an analog input signal;
a summation block to iteratively generate a subtraction signal, which is based on a difference between the analog input signal and a feedback signal;
a second circuitry to receive the subtraction signal; and
a plurality of comparison and latch circuitries arranged in parallel, wherein individual ones of the plurality of parallel comparison and latch circuitries is to sequentially receive an output of the second circuitry.
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Abstract
An Analog to Digital (ADC) is provided, where the ADC may include a sample and hold circuitry to sample an analog input signal, and a summation block to iteratively generate a subtraction signal. The subtraction signal may be based on a difference between the analog input signal and a feedback signal. The ADC may further include a common input stage to receive the subtraction signal, and a plurality of comparison and latch circuitries arranged in parallel, where individual ones of the plurality of parallel comparison and latch circuitries may sequentially receive an output of the common input stage.
8 Citations
25 Claims
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1. An Analog to Digital converter (ADC) comprising:
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a first circuitry to sample an analog input signal; a summation block to iteratively generate a subtraction signal, which is based on a difference between the analog input signal and a feedback signal; a second circuitry to receive the subtraction signal; and a plurality of comparison and latch circuitries arranged in parallel, wherein individual ones of the plurality of parallel comparison and latch circuitries is to sequentially receive an output of the second circuitry. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 23)
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13. A system comprising:
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a memory to store instructions; a processor coupled to the memory, the processor to execute the instructions; a wireless interface to allow the processor to communicate with another system; and an Analog to Digital converter (ADC) coupled to at least one of the memory, the processor, the wireless interface, or another component of the system, the ADC comprising; a plurality of comparison and latch circuitries arranged in parallel, wherein the plurality of comparison and latch circuitries is to generate a digital output that is a digital representation of an analog input signal, wherein an individual comparison and latch circuitry is to determine a corresponding bit of a plurality of bits of the digital output, and wherein the plurality of comparison and latch circuitries comprises at least a first comparison and latch circuitry and a second comparison and latch circuitry, and a comparison completion indication circuitry to trigger activation of the second comparison and latch circuitry, in response to a completion of a comparison operation and a latching operation in the first comparison and latch circuitry. - View Dependent Claims (14, 15, 16, 17)
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18. An apparatus comprising:
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a first circuitry to receive a first input signal and a second input signal; and a plurality of second circuitries arranged in parallel, wherein individual ones of the plurality of second circuitries is to sequentially receive an output of the first circuitry, and wherein a circuitry of the plurality of second circuitries comprise; one or more switches to selectively couple the first circuitry; one or more switchable loads, wherein the first circuitry and the one or more switchable loads is to compare the first and second input signals, and output the comparison results in a first output node and a second output node; a latch to regenerate and maintain the comparison result in the first and second output nodes; and a latch reset mechanism to reset the latch prior to the comparison. - View Dependent Claims (19, 20, 21, 22)
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24. An apparatus comprising:
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a plurality of comparison and latch circuitries, wherein an output of an individual one of the plurality of comparison and latch circuitries is to sequentially trigger initiation of a comparison and latch operation by a subsequent comparison and latch circuitry of the plurality of comparison and latch circuitries; and a trans-conductance input circuitry coupled to the plurality of comparison and latch circuitries, wherein the trans-conductance input circuitry is to receive a differential input and generate current for one of the individual one of the plurality of comparison and latch circuitries. - View Dependent Claims (25)
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Specification