Input circuit for an output stage
US6456108B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2001 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | May 23, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/16
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Described is a control circuit for an output stage for suppressing electrical and electromagnetic interference having a signal input (I), a signal output (O), and a ground terminal, two switch stages (1; 2) which are connected to the signal input (I) and the ground and which have one control terminal and one output terminal each, each switch stage (1; 2) switching over from a first state in which the potential at the output terminal follows the potential at the signal input (I) to a second state in which the potential at the output terminal is drawn to ground when a first or second threshold value (Uin1, Uin2) is exceeded at its control terminal, the control terminal (4) of the first switch stage (1) being connected to an intermediary potential, which is between the potential at the signal input (I) and ground, the output terminal (5) of the first switch stage (1) forming the control terminal of the second switch stage (2), the output terminal of the second switch stage forming the signal output (O) of the control circuit, and the threshold value (Uin1) of the first switch stage being higher than the threshold value (Uin2) of the second switch stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.