Reduced area active above-supply and below-ground noise suppression circuits
US6252418A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1999 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Sep 23, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/08
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A noise suppression circuit for suppressing noises above and below reference voltages is provided. The noise suppression circuit for suppressing noises includes a clamping transistor, a feedback circuit, and a presetting means for presetting an internal latch of the noise suppression circuit to a predetermined state. The predetermined state is a high state or a low state depending upon the type of noise suppression accomplished by the circuit. After the occurrence of a noise coupling event, the clamping transistor restores the state of a data input of a circuit to which the suppression circuit is providing protection. The feedback circuit then turns off the clamping transistor after a predetermined amount of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.