Voltage protection circuit for multi-drop bus of an automated coin vending machine
US6473283B1 · kind B1 · utility
10Cited by
23References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2000 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Jan 12, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F9/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voltage protective circuit for an electronic device comprises a metal oxide varistor for eliminating spikes above a first level, and a Zener diode and a transistor connected in series through a resistor with the metal oxide varistor for eliminating spikes above a second level. The voltage protective circuit can be utilized in a separate, plug-in voltage protector for a vending machine with a multi-drop bus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.