A-D encoder and D-A decoder system
US4700362A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1984 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | Aug 21, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/62
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An encoder converts an analog input signal to a digital signal. The encoder comprises a circuit for generating a control signal with a predetermined bandwidth from the input analog signal. The control signal indicates the desired optimum step-size to be applied in the encoder. The encoder further comprises a converter for converting the analog input signal to a digital signal. The converter is responsive to the control signal representing step-size so that the digital signal will be generated in accordance with the step-size information. Since the generation of a limited bandwidth control signal requires time, the encoder also includes a circuit for introducing time delay to the analog input signal, so that the delayed input signal reaches the converter when the control signal is available for digital encoding. A decoder generates an analog output signal from a digital signal received from an encoder through a transmission medium. The digital signal received includes a digital representation of an analog input signal to the encoder and step-size information which was used to digitally encode the analog signal in the encoder. The decoder comprises a converter responsive to a second …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.