Variable level periodic excitation circuit for a capacitive load
US5343084A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 1992 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Apr 29, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B2201/55
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A predetermined frequency and adjustable level excitation circuit for a capacitive load (B) having a first terminal connected to a reference voltage (G). The circuit includes two switches (S1, S2) connected in series between a supply voltage (Vcc) and the reference voltage (G). The junction (S) of the two switches is coupled to the second terminal (A) of the load. The two switches are not simultaneously closed. A circuit (10) periodically controls the closing of the switch connected to the supply voltage. A regulation circuit (R2, R3, 12) acts on the control circuit to trigger opening of one of the switches when the voltage across the load reaches a predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.