D/A converter with means to prevent output signal instability
US5319371A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1992 |
| Grant date | Jun 7, 1994 |
| Priority date | — |
| Expiry date | Dec 28, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/765
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A D/A converter of the type provided with an amplifier to produce the analog output signal and formed as an IC chip. The chip includes a power voltage monitor to sense when the applied DC voltage is above a preset lower level and below a preset upper level. When that condition is sensed, the monitor activates a control circuit which in turn opens a transmission gate between the amplifier output circuit and the converter output terminal, and closes a transmission gate between the output terminal and ground. When the DC voltage goes above the preset upper level, and a valid digital word is loaded into the converter register and presented for conversion, the condition of the transmission gates is reversed to provide for normal operation of the converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.