AC/DC coupling input network with low-power common-mode correction for current-mode-logic drivers
US7224189B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2005 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | May 17, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/09432
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An input network is provided within an integrated circuit for interfacing with signals produced by an external CML driver apparatus. The input network includes an input for receiving the signals, and this input is coupled to a terminating impedance, a DC attenuator and an AC attenuator. A common-mode correction loop is coupled to the AC attenuator and the DC attenuator for rejecting common-mode noise generated by the CML driver apparatus. The common-mode correction loop can also provide a common-mode voltage suitable for facilitating high-speed operation of low-voltage devices in the internal data path of the integrated circuit. An amplifier can be provided to compensate for signal attenuation in the input network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.