Shared cycle LSB generation for an array of successive approximation analog-to-digital converters
First Claim
Patent Images
1. An apparatus for converting a plurality of analog signals to a plurality of digital signals, comprising:
- a plurality of successive approximation (SAR) analog-to-digital converters (ADCs) each including a first input configured to receive a respective one of the plurality of analog signals, a second input configured to receive a cycle LSB signal, and an output configured to provide a respective one of the plurality of digital signals; and
a shared cycle LSB generator coupled to the plurality of SAR ADCs and configured to provide the cycle LSB signal shared by the plurality of SAR ADCs.
2 Assignments
0 Petitions
Accused Products
Abstract
An example apparatus for converting a plurality of analog signals to a plurality of digital signals includes: a plurality of successive approximation (SAR) analog-to-digital converters (ADCs) each including a first input configured to receive a respective one of the plurality of analog signals, a second input configured to receive a reference signal, and an output configured to provide a respective one of the plurality of digital signals; and a shared cycle LSB generator coupled to the plurality of SAR ADCs and configured to provide the reference signal shared by the plurality of SAR ADCs.
-
Citations
24 Claims
-
1. An apparatus for converting a plurality of analog signals to a plurality of digital signals, comprising:
-
a plurality of successive approximation (SAR) analog-to-digital converters (ADCs) each including a first input configured to receive a respective one of the plurality of analog signals, a second input configured to receive a cycle LSB signal, and an output configured to provide a respective one of the plurality of digital signals; and a shared cycle LSB generator coupled to the plurality of SAR ADCs and configured to provide the cycle LSB signal shared by the plurality of SAR ADCs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An integrated circuit (IC), comprising:
-
a plurality of analog front ends (AFEs) configured to provide a plurality of analog signals; a plurality of successive approximation (SAR) analog-to-digital converters (ADCs) each including a first input configured to receive one of the plurality of analog signals, a second input configured to receive a cycle LSB signal, and an output configured to provide a digital signal; a shared cycle LSB generator coupled to the plurality of SAR ADCs and configured to provide the cycle LSB signal shared by the plurality of SAR ADCs; and a processing system configured to process the digital signal output from each of the plurality of SAR ADCs. - View Dependent Claims (12, 13, 14, 15, 16, 17)
-
-
18. A method of converting a plurality of analog signals to a plurality of digital signals, the method comprising:
-
providing the plurality of analog signals to a plurality of successive approximation (SAR) analog-to-digital converters (ADCs) each including a first input configured to receive a respective one of the plurality of analog signals, a second input that configured to receive a cycle LSB signal, and an output configured to provide a respective one of the plurality of digital signals; and generating the cycle LSB signal using a cycle LSB reference generator shared by the plurality of SAR ADCs. - View Dependent Claims (19, 20, 21, 22)
-
-
23. A method of converting a plurality of analog signals to a plurality of digital signals, the method comprising:
-
providing the plurality of analog signals to a plurality of successive approximation (SAR) analog-to-digital converters (ADCs) each including a first capacitor that receives a respective one of the plurality of analog signals, a reference input circuit that receives a cycle LSB signal and is coupled to the first capacitor, and a comparator that is coupled to the first capacitor and provides a respective one of the plurality of digital signals; and each of the SAR ADCs controlling a voltage at the first capacitor to be α
[k](V[k−
1]−
D[k−
1]·
LSB[k]), where D[k] is a voltage output from the comparator in a kth cycle, LSB[k] is a voltage of the cycle LSB signal in the kth cycle, α
[k] is a scale factor for the kth cycle, D[k−
1] is the voltage output from the comparator in a k−
1th cycle, and V[k−
1] is the voltage at the first capacitor at the k−
1th cycle. - View Dependent Claims (24)
-
Specification