Supply-modulation cross domain data interface
First Claim
1. A method for communicating a data signal within an integrated circuit of a processing system having a first power supply voltage domain and a second power supply voltage domain, wherein at least one of a positive power supply voltage of the second power supply voltage domain and a negative power supply voltage of the second power supply voltage domain are modulated with respect to the first power supply voltage domain, the method comprising:
- receiving the data signal at a first node of the integrated circuit, wherein the first node is within the first power supply voltage domain;
generating a first intermediate differential signal from the data signal via a first conversion circuit of the integrated circuit;
communicating the first intermediate differential signal to a first cross-coupled latch, wherein the first cross-coupled latch generates a first output signal based on the first intermediate differential signal; and
outputting the first output signal from a second node of the integrated circuit, wherein the second node is in the second power supply voltage domain, wherein generating the first intermediate differential signal comprises;
removing effects corresponding to modulation in at least one of the positive power supply voltage of the second power supply voltage domain and the negative power supply voltage of the second power supply voltage domain.
2 Assignments
0 Petitions
Accused Products
Abstract
A method for converting data signals from one power supply voltage domain for use in another power supply voltage domain. The method includes receiving the data signal at a first node of the integrated circuit, wherein the first node is within the first power supply voltage domain. The method also includes generating a first intermediate differential signal from the data signal via a first conversion circuit of the integrated circuit. The method further includes communicating the first intermediate differential signal to a first cross-coupled latch, wherein the first cross-coupled latch generates a first output signal based on the first intermediate differential signal. The method also includes outputting the first output signal from a second node of the integrated circuit, wherein the second node is in the second power supply voltage domain. Other embodiments, such as an integrated circuit, and an input device, are also provided.
18 Citations
30 Claims
-
1. A method for communicating a data signal within an integrated circuit of a processing system having a first power supply voltage domain and a second power supply voltage domain, wherein at least one of a positive power supply voltage of the second power supply voltage domain and a negative power supply voltage of the second power supply voltage domain are modulated with respect to the first power supply voltage domain, the method comprising:
-
receiving the data signal at a first node of the integrated circuit, wherein the first node is within the first power supply voltage domain; generating a first intermediate differential signal from the data signal via a first conversion circuit of the integrated circuit; communicating the first intermediate differential signal to a first cross-coupled latch, wherein the first cross-coupled latch generates a first output signal based on the first intermediate differential signal; and outputting the first output signal from a second node of the integrated circuit, wherein the second node is in the second power supply voltage domain, wherein generating the first intermediate differential signal comprises; removing effects corresponding to modulation in at least one of the positive power supply voltage of the second power supply voltage domain and the negative power supply voltage of the second power supply voltage domain. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method for communicating a data signal within an integrated circuit of a processing system having a first power supply voltage domain and a second power supply voltage domain, wherein at least one of a positive power supply voltage of the second power supply voltage domain and a negative power supply voltage of the second power supply voltage domain are modulated with respect to the first power supply voltage domain, the method comprising:
-
receiving the data signal at a first node of the integrated circuit, wherein the first node is within the first power supply voltage domain; generating a first intermediate differential signal from the data signal via a first conversion circuit of the integrated circuit; communicating the first intermediate differential signal to a first cross-coupled latch, wherein the first cross-coupled latch generates a first output signal based on the first intermediate differential signal; and outputting the first output signal from a second node of the integrated circuit, wherein the second node is in the second power supply voltage domain, wherein communicating the first intermediate differential signal to the first cross-coupled latch further comprises; communicating the first intermediate differential signal to a first current mirror configured to generate a first current mirror signal based on the first intermediate differential signal; and generating the first output signal based on the first current mirror signal. - View Dependent Claims (9)
-
-
10. An integrated circuit comprising:
-
a first power supply voltage domain; a second power supply voltage domain, wherein at least one of a positive power supply voltage of the second power supply voltage domain and a negative power supply voltage of the second power supply voltage domain are modulated with respect to the first power supply voltage domain; and a cross-domain interface circuit, comprising; a first conversion circuit that includes a first node and that is within the first power supply voltage domain, and a second conversion circuit that is within the second power supply voltage domain and that includes a second node and a first cross-coupled latch, wherein the first conversion circuit is configured to receive a data signal at the first node, generate a first intermediate differential signal from the data signal, and communicate the first intermediate differential signal to the second conversion circuit; and wherein the second conversion circuit is configured to receive the first intermediate differential signal at the first cross-coupled latch, generate a first output signal based on the first intermediate differential signal via the first cross-coupled latch, and output the first output signal from the second node, wherein; the second conversion circuit includes a first current mirror configured to generate a first current mirror signal based on the first intermediate differential signal, and the second conversion circuit is configured to generate the first output signal based on the first current mirror signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 18)
-
-
17. An integrated circuit comprising:
-
a first power supply voltage domain; a second power supply voltage domain, wherein at least one of a positive power supply voltage of the second power supply voltage domain and a negative power supply voltage of the second power supply voltage domain are modulated with respect to the first power supply voltage domain; and a cross-domain interface circuit, comprising; a first conversion circuit that includes a first node and that is within the first power supply voltage domain, and a second conversion circuit that is within the second power supply voltage domain and that includes a second node and a first cross-coupled latch, wherein the first conversion circuit is configured to receive a data signal at the first node, generate a first intermediate differential signal from the data signal, and communicate the first intermediate differential signal to the second conversion circuit; and wherein the second conversion circuit is configured to receive the first intermediate differential signal at the first cross-coupled latch, generate a first output signal based on the first intermediate differential signal via the first cross-coupled latch, and output the first output signal from the second node, wherein; the first conversion circuit further includes a pair of alternating-current couplings configured to generate the first intermediate differential signal based on the data signal.
-
-
19. An integrated circuit comprising:
-
a first power supply voltage domain; a second power supply voltage domain, wherein at least one of a positive power supply voltage of the second power supply voltage domain and a negative power supply voltage of the second power supply voltage domain are modulated with respect to the first power supply voltage domain; and a cross-domain interface circuit, comprising; a first conversion circuit that includes a first node and that is within the first power supply voltage domain, and a second conversion circuit that is within the second power supply voltage domain and that includes a second node and a first cross-coupled latch, wherein the first conversion circuit is configured to receive a data signal at the first node, generate a first intermediate differential signal from the data signal, and communicate the first intermediate differential signal to the second conversion circuit; and wherein the second conversion circuit is configured to receive the first intermediate differential signal at the first cross-coupled latch, generate a first output signal based on the first intermediate differential signal via the first cross-coupled latch, and output the first output signal from the second node, wherein the first intermediate differential signal is in the first power supply voltage domain and wherein the first intermediate differential signal is converted into a second intermediate differential signal in the second power supply voltage domain by the first cross-coupled latch. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
-
-
30. An input device, comprising:
-
a plurality of sensor electrodes; and a processing system configured to drive the plurality of sensor electrodes for capacitive sensing, the processing system including an integrated circuit comprising; a first power supply voltage domain; a second power supply voltage domain, wherein at least one of a positive power supply voltage of the second power supply voltage domain and a negative power supply voltage of the second power supply voltage domain are modulated with respect to the first power supply voltage domain; and a cross-domain interface circuit, comprising; a first conversion circuit that includes a first node and that is within the first power supply voltage domain, and a second conversion circuit that is within the second power supply voltage domain and that includes a second node and a first cross-coupled latch, wherein the first conversion circuit is configured to receive a data signal at the first node, generate a first intermediate differential signal from the data signal, and communicate the first intermediate differential signal to the second conversion circuit; and wherein the second conversion circuit is configured to receive the first intermediate differential signal at the first cross-coupled latch, generate a first output signal based on the first intermediate differential signal via the first cross-coupled latch, and output the first output signal from the second node.
-
Specification