Transdermal drug delivery device with waveshape generator
US5499967A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1994 |
| Grant date | Mar 19, 1996 |
| Priority date | — |
| Expiry date | Jan 13, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/157
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The device comprises a switched-mode power supply (1) equipped with an electronic switching member (T.sub.1), the closing of which controls the power supply to an inductor (L.sub.1) which discharges, when the member reopens, into a capacitor (C.sub.1) at the terminals of which the output voltage of the device appears, characterized in that it comprises (a) storage means for recording a sequence of image numbers of successive segments of the predetermined waveform, (b) a clocked digital counter (2) and (c) means (3) for successively loading this counter (2) with each of the numbers of this sequence considered as a bound of the count performed by the counter (2), the latter cyclically controlling the closing of the switching member (T.sub.1) for a predetermined time interval, each time the count performed reaches the limit thus fixed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.