Duty cycle control circuitry for input/output (I/O) margin control
US11201611B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2018 |
| Grant date | Dec 14, 2021 |
| Priority date | — |
| Expiry date | Dec 12, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/135
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An input/output (I/O) circuit provides a direct current (DC) bias between I/O stages to control duty cycle of the I/O. The I/O circuit can include one or more predriver stages and one or more output stages. The predriver stages can collectively be referred to as a predriver stage, and the output stages can collectively be referred to an output stage. The output stage for a transmitter drives the signal line. The output stage for an input buffer provides a receive signal for processing by the receiver. The I/O circuit includes a control circuit to control the DC bias between the stages to provide trim adjustment of a duty cycle for the output stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.