Power supply down-conversion, regulation and low battery detection system
US4952864A · kind A · utility
51Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Jun 1, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J2310/23
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A low battery detect circuit shuts down high current circuitry in the system in the event that battery voltage drops to a level such that the regulated output voltage is endangered. The trigger voltage is dependent upon capacitor ratios and a reference voltage. The output of the detection circuitry is a digital signal which can be used to disable high current circuitry in an implantable medical device and, thus, allow the battery voltage to recover. Alternatively, the output of the detection circuitry can be used as a battery status indicator flag.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.