NOISE SHAPING IN A DIGITAL-TO-ANALOG CONVERTOR
First Claim
Patent Images
1. A method for shaping low frequency noise comprising:
- converting a binary input to a thermometric code;
extracting signal information from the thermometric code;
decimating the signal information;
converting the signal information into a lower bit-count signal;
upsampling the lower bit-count signal;
applying mismatch shaping on a plurality of unit elements in the lower bit-count signal at a first DAC; and
outputting from the first DAC a signal component of the lower bit-count signal.
1 Assignment
0 Petitions
Accused Products
Abstract
Systems and methods are disclosed for a signal convertor comprising a resistor or current source coupled to a positive virtual ground node and a negative virtual ground node, wherein the resistor or current source is configured to switch from the positive virtual ground node (VGP) to the negative virtual ground node (VGN), wherein the switching of the resistor or current source results in a shaping of the low frequency noise from the resistor.
-
Citations
20 Claims
-
1. A method for shaping low frequency noise comprising:
-
converting a binary input to a thermometric code; extracting signal information from the thermometric code; decimating the signal information; converting the signal information into a lower bit-count signal; upsampling the lower bit-count signal; applying mismatch shaping on a plurality of unit elements in the lower bit-count signal at a first DAC; and outputting from the first DAC a signal component of the lower bit-count signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A signal convertor, comprising:
-
a first resistor; a first transistor; a second transistor coupled to the first transistor and to the first resistor, the first transistor coupled to a positive virtual ground node and the second transistor coupled to a negative virtual ground node; an element selection logic module coupled to the first and second transistors, the element selection module configured to switch a binary input from the positive virtual ground node (VGP) to the negative virtual ground node (VGN) through; conversion of the binary input to a thermometric code; extraction of signal information from the thermometric code; decimation of the signal information; conversion of the signal information into a lower bit-count signal; upsampling of the lower bit-count signal; application of mismatch shaping on a plurality of unit elements in the lower bit-count signal at a first digital-to-analog convertor (DAC); and cause the first DAC to output a signal component of the lower bit-count signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. A signal convertor comprising:
-
a digital-to-analog convertor comprised of a plurality of unit elements, wherein each of the unit elements comprises; a first resistor; a second resistor; a first transistor; a second transistor; a third transistor; and a fourth transistor;
whereinthe first transistor is coupled to the first resistor at a virtual positive ground node and the second transistor coupled to the first resistor at a virtual negative ground node; and the third transistor is coupled to the second resistor at the virtual positive ground node and the fourth transistor is coupled to the second resistor at the virtual negative ground node. - View Dependent Claims (20)
-
Specification