Buffer circuit device supplying a common mode voltage applicable to a next-stage circuit receiving output signals of the buffer circuit device
US7098699B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2003 |
| Grant date | Aug 29, 2006 |
| Priority date | — |
| Expiry date | Nov 20, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0292
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A buffer circuit device, which receives differential input signals and outputs differential output signals, has a buffer circuit, a common mode level generator circuit, a common mode voltage detection circuit, and a bias voltage adjusting circuit. The buffer circuit receives the input signals and outputs the output signals, and the common mode level generator circuit outputs a specific level of a common mode voltage of the output signals to be output from the buffer circuit. The common mode voltage detection circuit detects a common mode voltage of specific signals, and the bias voltage adjusting circuit adjusts a bias voltage to be supplied to the buffer circuit by comparing an output signal of the common mode level generator circuit with an output signal of the common mode voltage detection circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.