Digital signal processing apparatus for analog signals having wide frequency and dynamic ranges
US4740744A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1985 |
| Grant date | Apr 26, 1988 |
| Priority date | — |
| Expiry date | Sep 18, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3607
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A digital signal processing apparatus for operating upon analog signals having wide dynamic and frequency ranges is described. The invention includes a digital section and an analog section, the digital section providing digital words representative of analog signals to be transmitted, and receiving digital representations of analog signal received from the test subject, and processing said digital representations. The analog section transforms the digital representations of the signals to be transmitted into analog form and applies them to the test subject by way of a balanced output driver. The analog section includes a receiving section which receives analog signals from the test subject and transforms the analog signals into digital representations thereof. The digital section also provides control information to the analog section. The data and control information being communicated between the analog and digital sections are transferred by way of optical isolators. Further, the analog section is powered by a floating power supply. As such the analog section presents an input and an output port to the test subject which are transformer-like; i.e. floating and balanced. Further…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.